Glossary.
Technical terms from silicone technology, adhesive technology, and potting, explained briefly and clearly. The glossary supports reading technical data sheets and classifying chemical-technical products: from RTV silicones to sealing technology to potting compounds.
Terms
Technical Terms A to Z
General term explanations, not product guarantees. The technical data sheet is binding.
0-9
1K System
Single-component and ready to use, without mixing. Cures through moisture, heat, light, or exclusion of air.
2K system
Two-component: base and hardener are mixed in the correct ratio before use.
A
Shielding Attenuation
Measure of the effectiveness of a shield, expressed in decibels.
Acrylic Sealant
Paintable sealant for interior use and secondary joints. Limited extensibility.
Acrylic resin
Fast-curing resin for model making, repair, and mineral casting. Good dimensional accuracy, often low odor.
Addition crosslinking
Crosslinking type of platinum-catalyzed RTV-2 and LSR silicones. Cures without the release of by-products, resulting in low shrinkage and dimensional accuracy, even in thick layers. Sensitive to inhibition.
Adhesion
Adhesion of the adhesive to the substrate. Depends on surface energy, cleanliness, and pretreatment.
Activator
Additive that accelerates curing or initiates it on passive surfaces, e.g., with cyanoacrylates and anaerobic adhesives.
Anaerobic adhesives
One-component, curing in the absence of air and in contact with metal; they remain liquid in air. Typical for threadlocking, shaft-hub connections, and thread sealing.
Anti-seize
Assembly paste that prevents seizing, cold welding, and corrosion on threaded and plug connections.
Release coating
Surface that reduces the adhesion of media, often based on PTFE or silicone.
Set Time / Tack-Free Time
Time to the first load-bearing strength, from which the parts are fixed. The final strength is achieved later.
ASTM E595
Standard outgassing test for aerospace with parameters TML and CVCM.
Application amount / bead
Applied material quantity, for example as a bead of defined width and height.
Degree of cure
Progress of crosslinking. Incomplete curing reduces properties.
Curing mechanism
The way an adhesive cures, e.g., moisture-, heat-, light-, or anaerobic-induced. Determines processing and application limits.
Dispensing device
Manual, pneumatic, or battery-operated tool for dispensing cartridges.
Avionics
Aerospace avionics. Requires protection against vibration, temperature, moisture, and partly low outgassing.
B
Barcol hardness
Hardness measure for cured resins and laminates. Used for cure monitoring.
Battery Pack Potting
Potting and heat dissipation of cells and modules, often with thermally conductive, flame-retardant compounds.
Etching / roughening
Chemical or mechanical pretreatment that improves adhesion through a larger, activated surface area.
Wetting
Spreading of the liquid adhesive on the surface. Good wetting is a prerequisite for durable adhesion.
Accelerator
Additive that shortens curing or setting time. Dosage affects pot life and final properties.
Bio-based Resin
Resin with partially bio-based raw materials, as a more sustainable alternative to purely fossil-based systems. Properties vary by product.
Refractive index
Optical parameter, important for clear resins and optical encapsulation.
Butyl sealant
Permanently plastic, vapor-tight sealant. Used for sealing against moisture and gases, e.g., in insulating glass construction.
C
Batch number
Identifier that assigns a product to a production batch. Basis for traceability.
CIPG
Sealing bead that fully cures before joining. Results in a pre-compressed, re-openable seal.
COA
Certificate of analysis documenting the measured values of a specific batch.
COC
Certificate of conformity confirming that a delivery meets the specification.
Composite bonding
Bonding of fiber composite components, often with epoxy or MMA structural adhesives and appropriate surface pretreatment.
Conformal Coating
Thin protective coating that replicates the contours of a populated circuit board and protects against moisture, dust, and chemicals. Base depending on type: acrylic, silicone, polyurethane, or parylene.
cSt
Unit of kinematic viscosity, common for silicone oils.
CVCM
Proportion of volatile, condensable constituents according to ASTM E595. The limit for aerospace applications is usually 0.1 percent.
Cyanoacrylate
Instant adhesive that cures within seconds due to traces of atmospheric moisture. High initial strength on small, well-fitting surfaces; weak in gaps, under peel stress, and with prolonged exposure to moisture or heat.
D
Dam-and-Fill
Two-stage process in which a dam is first set and then filled. Allows targeted potting of limited areas.
Permanently elastic vs. permanently plastic
Permanently elastic sealants return to their original shape after deformation, while permanently plastic ones remain deformed. The choice depends on joint movement.
Continuous service temperature
Temperature range for continuous use. Short-term peaks may be higher.
Decontamination resistance
Resistance to cleaning and decontamination media, relevant in defense and medical applications.
Density
Mass per volume. Relevant for weight, yield, and mixing calculations.
Dielectricity
Electrical insulating capability of a material. Fundamental requirement for potting compounds in electronics.
double cartridge
Two separate chambers for 2K material, dispensed through a static mixer.
Dispensing needle
Nozzle for precise application of small quantities.
Dispensing Robot
Automated application of beads, dots, and surfaces with high repeatability.
Dispensing valve
Component for defined, reproducible material dispensing in production.
Dielectric strength
Maximum electric field strength that a material can withstand before breakdown, in kV/mm. Important characteristic value for insulation and potting.
Dynamic mixer
Actively driven mixer for demanding or highly viscous 2K systems.
E
Modulus of elasticity
Measure of stiffness. High E-modulus means rigid, low means flexible.
EDAG
Product line of conductive coatings based on silver, copper, or graphite, e.g., for EMC shielding.
Electrical casting resin
Casting resin specifically for potting electrical and electronic components. Combines insulation and mechanical protection.
EMI/RFI Shielding
Shielding of electromagnetic and high-frequency interference fields through conductive layers, gaskets, or housings.
EMC
Electromagnetic compatibility, i.e., immunity to interference and low interference emission. Shielding and conductive gaskets contribute to this.
Encapsulation / Encapsulation
Encapsulation of a component with a protective layer without completely filling a housing. The distinction from potting is fluid.
Final strength
Strength after complete curing. Achieved within hours to days depending on the system.
Degreaser
Cleaner that removes grease and oils before bonding or coating.
Demolding time
Time after which a molded part or an impression can be removed from the mold. Depends on system, layer thickness, and temperature.
Degas
Removal of entrained air from a material, usually under vacuum, for bubble-free potting.
EP Additive
High-pressure additive that maintains the lubricating film under high load and reduces wear.
Epoxy resin
High-strength, chemical- and temperature-resistant reactive resin composed of resin and hardener. Hard and generally difficult to repair, versatile for potting, bonding, and coating.
Epoxy adhesive 1K
One-component, cures under heat. Very high strength and media resistance, stored refrigerated depending on type.
2K Epoxy Adhesive
Composed of resin and hardener, cures at room temperature or accelerated under heat. Structurally high-strength and chemical-resistant.
Initial sample inspection
Inspection of the first serial delivery against the specification before release.
Exothermicity
Heat released by a reacting resin during curing. With thick layers, self-heating can become critical.
F
Fiber composite / Composite
Material consisting of a resin matrix and reinforcing fibers such as glass or carbon. High strength at low weight, important in lightweight construction.
FDA conformity
Suitability of a material for food contact according to US regulations. Applies product-specifically.
Solid lubricant
Solid lubricant such as MoS2, graphite, or PTFE, which provides load-bearing capacity under high load and boundary lubrication. Also used as an additive in oil.
FIPG
A seal applied as a bead that cures only after joining, often made of RTV-1 silicone. Replaces pre-formed gaskets, e.g., on housings, gearboxes, and pumps.
Flange gasket
Sealing of flat, mating surfaces, classically with FIPG. Adapts to tolerances and surface conditions.
Fluorosilicone
Silicone with fluorinated side groups, resistant to fuels, oils, and solvents. Used where standard silicone swells, such as in aviation and fuel systems.
Mold release agent
Release agent specifically for mold making, depending on the matrix for silicone, resin, or concrete.
Release / Approval
Customer-side approval of a material for a specific application.
Joint sealing
Sealing of component joints against water, air, or sound. Flexibility must match joint movement.
G
Gap Filler
Soft, thermally conductive compound that fills air gaps between a component and a heat sink. Improves heat dissipation.
Container
Packaging unit of a product, from cartridge to drum.
Hazardous goods / ADR
Substances with special transport regulations according to ADR. Concerns labeling and shipping.
Gel Time
Time until a mixed resin transitions from liquid to gel state. Marks the end of workability.
Thread sealing
Sealing of threaded and pipe connections, anaerobic or with PTFE. Pressure-tight and re-releasable depending on type.
Casting resin
Reaction resin for molding and casting in molds. Selection based on pot life, hardness, transparency, and shrinkage.
Glass Transition Temperature (Tg)
Temperature at which a polymer transitions from hard-brittle to tough-soft. Above Tg, mechanical and thermal properties change significantly.
Glob top
Drop-shaped protective encapsulation over a chip and its bond wires. Protects sensitive connections.
Graphite
Solid lubricant for high temperatures, even where oils would carbonize.
Base oil viscosity
Viscosity of the base oil in the grease, determining the load and speed range.
H
Adhesive lubricant
Strongly adhesive, throw-resistant lubricant for open drives such as chains and gears.
Adhesion without primer
Self-adhesion of a sealant without a separate adhesion promoter. Depends on the substrate; if in doubt, verify with a test.
Adhesion modifier
Additive or pretreatment that improves the adhesion of a silicone or adhesive to the substrate.
Hardener
Second component that crosslinks a reactive resin. Type and quantity determine pot life, hardness, and final properties.
cure profile
Temporal and thermal progression of curing, e.g., temperature and hold time.
Skin formation time
Time after which the surface of a reacting sealant or silicone is tack-free. Temperature- and humidity-dependent, reference values according to the data sheet.
HTV
Solid silicone rubber that is vulcanized under heat. Processed into molded parts, profiles, and hoses, usually by compression or injection molding.
Hydrophobization
Water-repellent treatment of a surface, e.g., for protection against moisture.
I
Industrial cleaner
Cleaner for surfaces, tools, and equipment in production.
Inhibition
Disturbance or failure of curing of platinum-catalyzed silicones due to contact with certain substances such as tin compounds, sulfur, amines, or certain plastics and adhesive tapes. Before use, a compatibility test on the original material is recommended.
IP protection class
Degree of protection against dust and water, e.g., IP67. Potting and sealing contribute to this.
ISO 10993
Standard series for the biological evaluation of medical devices. Basis for biocompatible silicones and adhesives.
K
Cartridge
Cartridge for manual or pneumatic dispensing of adhesives and sealants.
Clear resin / optical resin
Transparent casting resin for design objects, embedding, and LED potting. Refractive index and yellowing resistance are important.
Cohesion
The internal strength of the cured adhesive itself. If a bond fails cohesively, the adhesive tears, not the interface.
Condensation curing
Crosslinking type of RTV silicones, usually tin-catalyzed. During curing, a volatile by-product is released, causing slight shrinkage. Robust against critical substrates, common in tool and mold making.
Packing
Repackaging, filling, and container adaptation according to customer requirements, such as sets in the correct mixing ratio.
Contact Adhesive
Apply to both surfaces, allow to flash off, then join under pressure. Immediately load-bearing, suitable for large-area bonding.
Conversion Coating
Chemically produced protective and adhesion layer, e.g., phosphating before painting.
Corrosion protection
Measures and products that protect metal from corrosion, from oil film to coating.
Corrosion protection oil
Forms a temporary protective film against corrosion during storage and transport.
Comparative Tracking Index (CTI)
Resistance of a surface to conductive tracking paths under voltage and moisture. Higher CTI means greater safety.
Refrigerated shipping
Temperature-controlled shipping for products requiring cooling, such as platinum silicones.
L
Storage Temperature
Recommended storage area. Platinum silicones and some adhesives require refrigeration.
Laminating resin
Resin for impregnating fiber mats in composite structures. Low viscosity for good fiber wetting.
Lightweight structural bonding
Bonding instead of riveting or welding to save weight and introduce loads over a large area.
Conductive Coating
Electrically conductive layer for dissipation, contacting, or shielding.
Conductive Silicones
Silicones filled with metal particles that simultaneously seal and provide electromagnetic shielding. Common in electronics, aerospace, and defense.
Low Outgassing
Low outgassing in vacuum, important in aerospace and optics. Evaluated according to ASTM E595, values per data sheet.
LSR
Liquid silicone, an addition-curing two-component system for injection molding. Enables fast, automated production of precise silicone parts, including medical-grade qualities.
M
MIL-Spec
Military specification with defined requirements and tests. Claim conformity only with proof.
Mineral casting
Resin system highly filled with mineral powder for solid, cast-like parts, such as Acrystal. Stiff, cold-curing surfaces.
Mineral oil
Petroleum-based base oil for standard applications. Inexpensive, with limited temperature range.
Mixing Ratio
Ratio of base to hardener in two-component systems, e.g., 1:1 or 10:1, by weight or volume. Accurate adherence is a prerequisite for the specified properties.
MMA adhesive
Structural adhesive based on methacrylate, tough and impact-resistant, with good adhesion to GRP, CFRP, aluminum, and many plastics. Tolerant of slightly oily surfaces.
Module (sealant)
Stress that a sealant builds up at a defined elongation. Low-modulus types stress the adhesion surfaces less.
MoS2
Molybdenum disulfide, solid lubricant for high loads and running-in processes.
mPas
Unit of dynamic viscosity. Water has about 1 mPas.
MS sealant
Sealant based on silane-modified polymer, elastic, paintable, and low-odor. Adheres without primer on many substrates.
MS polymer
Bonds and seals with permanent elasticity, without isocyanate and without silicone. Good adhesion, paintable, weather-resistant.
N
Post-Curing / Tempering
Heat post-treatment after initial curing to achieve final properties, low residual reactivity, and low outgassing. Conditions according to data sheet.
NLGI grade
Classification of grease consistency from soft to firm. Determines pumpability and stand-up behavior.
NSF H1
Registration for lubricants with approved, incidental food contact. Applies product-specifically according to manufacturer documentation.
NSF H2
Approved for applications without possible food contact.
O
Surface energy
Measure of the wettability of a surface. Low-energy plastics such as PP and PE are difficult to bond without pretreatment.
Surface Pretreatment
Cleaning, degreasing, roughening, or activating before bonding. Often decisive for durable adhesion.
Surface resistivity
Electrical resistance along a surface. Characteristic value for dissipative or insulating surfaces.
Obsolescence
Discontinuation of a material or brand. Forces requalification or a second source.
Open Time
Time window after application during which parts can still be joined. Influenced by temperature and humidity.
Optical encapsulation
Transparent, low-yellowing potting compound for LED, sensor technology, and optics. Refractive index and lightfastness are decisive.
P
PAO
Synthetic base oil with good temperature and aging behavior. Basis of many modern lubricants.
Passivation
Creation of a thin, chemically resistant protective layer on metal, e.g., on stainless steel.
PDMS
Polydimethylsiloxane, the most common silicone base polymer. Basis of many silicone oils, elastomers, and sealants. Chain length and crosslinking control viscosity and hardness.
PFPE
Chemically almost inert high-performance lubricant for heat, oxygen, vacuum, and aggressive media. Very resistant, high-priced.
Plasma treatment
Activates and cleans surfaces and increases surface energy for better adhesion.
Platinum Catalyst
Catalyst for addition-curing silicones. Very effective, but sensitive to substances that interfere with curing (inhibition).
Polyester resin
Laminating and casting resin, cost-effective, with noticeable shrinkage and styrene odor. Common in boat building and molded parts.
Polysiloxane
Chemically correct generic term for silicones. The backbone consists of alternating silicon and oxygen atoms with organic side groups, usually methyl. Structure and side groups determine the properties.
Polyurethane resin
Tough-elastic to hard casting resin, impact-resistant and versatilely adjustable. Suitable for mechanically stressed castings and molded parts.
Polyurethane adhesive
Tough-elastic adhesive and sealant for flexible connections of different materials.
Potting
Complete encapsulation of an assembly in a housing. Protects against moisture, vibration, dust, and chemical influences, and provides electrical insulation.
Primary and secondary sealing
Two-stage sealing system in which a secondary seal backs up the primary seal. Common in demanding housings.
Primer / adhesion promoter
Pretreatment that improves adhesion on a substrate, depending on the system for metal, glass, ceramic, or plastic. Selection and flash-off time according to the data sheet.
PTFE
Low-friction plastic used as a solid lubricant and additive as well as in release agents.
PVA release agent
Water-based film former as a barrier layer, especially for polyester resins.
Q
Qualification
Proof through tests and documentation that a material meets the requirements of an application.
R
REACH
EU regulation for the registration and restriction of chemicals, relevant for the SDS.
Elongation at break
Elongation that an elastomer or adhesive withstands until break, in percent.
Repairability / Rework
Ability to reopen a potting compound and replace components. Silicone pottings are often advantageous here, epoxides are rarely repairable.
RoHS
EU Directive on the restriction of hazardous substances in electrical equipment.
RTI
Thermal long-term rating of a material assigned by UL.
RTV
Silicones that cure at room temperature without heat input. Differentiated into one-component (RTV-1) and two-component (RTV-2) systems. Typical applications include sealing, bonding, potting, and mold making.
RTV-1
One-component silicone that cures from the outside inward through atmospheric moisture. Ideal for sealing seams and bonding applications with limited layer thickness. In thick cross-sections, the core cures only slowly.
RTV-2
Two-component silicone consisting of base and hardener that cures throughout the entire volume, independent of ambient humidity. Enables precise, low-shrinkage molding and potting, even in thick layers.
Resilience
Measure of elastic recovery, e.g., in damping applications.
Traceability
Seamless traceability across batch and delivery. Important in regulated industries.
S
Salt spray resistance
Corrosion and aging resistance in salt spray testing, important for maritime and defense applications.
Peel strength
Resistance to edge peeling. Adhesive bonds withstand peeling significantly worse than shearing.
Shear strength
Strength of an adhesive bond under shear load, the most favorable type of load for adhesives. Preferred in design.
Hot melt adhesive
Thermoplastic, applied hot and sets upon cooling. Fast and solvent-free, with limited heat resistance.
Lubricating Grease
Composed of base oil, thickener, and additives. Remains at the lubrication point, suitable for open and hard-to-reach areas.
Lubricating oil
Liquid lubricant for circulating lubrication, hydraulics, and gears. The viscosity determines the application range.
Shock resistance
Resistance to short, high accelerations, e.g., during transport and use in defense technology.
Threadlocking
Anaerobic adhesive that secures threaded fasteners against self-loosening due to vibration and simultaneously seals. Available in strength classes from low to high.
Protection rating through potting
Protection against the ingress of dust and water, achieved through full encapsulation. Contributes to the IP rating.
Shrinkage
Volume loss during curing. Low shrinkage is important for dimensional accuracy and freedom from stress.
SDS
Safety data sheet with information on hazards, protection, and disposal. Legally required.
Sensor encapsulation
Protection of sensors and their electronics through encapsulation, with mechanical decoupling and media protection.
Shelf life
Storage stability from the date of manufacture under defined conditions. After expiry, properties must be re-tested.
Shore hardness A
Hardness measure for soft to medium elastomers, e.g., Shore A 10 to 90. Low values are soft and extensible.
Shore hardness D
Hardness measure for hard elastomers and plastics, above the Shore A range.
Silanol
Reactive silicon-hydroxyl group (SiOH). Involved in condensation curing and in the adhesion of silicones to many substrates.
Silicone
Collective term for synthetic polymers with a backbone of silicon and oxygen (polysiloxanes) and organic side groups. Silicones combine temperature resistance, elasticity, electrical insulation, and UV and weather stability. They occur as oils, greases, resins, sealants, and elastomers.
Silicone sealant
RTV-1 sealant for sealing and bonding, permanently elastic and temperature-resistant. Depending on the type, neutral or acetic acid-curing.
Silicone emulsion
Water-based dispersion of silicone, low in solvents and easy to process. Used as a release agent, lubricant, and for hydrophobization.
Silicone grease
Silicone oil thickened with a thickener. Temperature-stable, oxidation-resistant, and gentle on many plastics and elastomers, e.g., on seals and fittings.
Silicone resin
Highly crosslinking silicone for high-temperature coatings and electrical insulation. Forms hard, heat-resistant films.
Silicone rubber
The crosslinked, elastic silicone (elastomer). Permanently elastic, temperature-resistant, and stable against aging.
Silicone Oil
Linear, non-crosslinked polysiloxane with defined viscosity. Used for lubrication, release, defoaming, and damping, as well as a base material for pastes and emulsions.
Silicone paste
Highly filled silicone with paste-like consistency for assembly, sealing, and separation. Depending on type, resistant to temperature and media.
Gap bridging
Ability of an adhesive to fill and cure gaps between the parts to be joined. Important for parts that do not fit precisely.
Low stress
Property of a potting compound to exert low mechanical stress on sensitive components. Important under thermal cycling.
Non-slumping vs. self-leveling
Describes the flow behavior. Non-slumping types remain on vertical surfaces, while self-leveling types flow out and produce smooth surfaces.
Pot life in the mixer
Time before a 2K system gels in the static mixer and clogs it.
Static mixer
Mixing tube with stationary helical elements that homogenizes 2K material during dispensing without moving parts.
Structural adhesive
High-strength, load-bearing adhesive as an alternative to welding or riveting. Combines strength with a certain degree of toughness.
Substrate / Joining Part
The material to be bonded or coated. The substrate and its surface determine the choice of adhesive.
Synthetic oil
Synthetically produced base oil, more temperature-stable and more resistant to aging than mineral oil.
T
TDS
Technical data sheet with properties, processing, and limit values. Binding source for selection.
Thermally conductive potting compound
Potting compound with fillers that dissipate heat from components. Higher conductivity usually at the expense of viscosity and elasticity.
Thermal management
Targeted heat dissipation in assemblies via gap fillers, pastes, and thermally conductive potting compounds.
Thixotropy
Property of becoming thinner under shear and stiffening again at rest. Prevents running off vertical surfaces.
TIM
Generic term for thermal interface materials between a heat source and a heat sink, such as pastes, pads, and gap fillers.
TML
Total mass loss of a specimen in vacuum according to ASTM E595. For low outgassing, the limit is usually 1 percent.
Pot life
Time span during which a mixed two-component system remains workable. Highly dependent on temperature and batch size; reference values per data sheet.
Release Lacquer / Sealing
Seals porous molds before the actual release agent is applied.
Release agent
Prevents adhesion during casting and molding and ensures clean demolding.
Release Wax
Wax-based release agent that is polished to provide glossy surfaces.
Dropping point
Temperature at which a grease becomes liquid. Reference value for the upper service temperature.
U
UAV / Drone
Unmanned aerial vehicle. Material topics include lightweight potting, structural bonding, sealing, and sensor protection.
UL94
Classification of flammability of plastics, e.g., V-0, V-1, HB. Important in electronics and rail.
Underfill
Low-viscosity resin that fills the gap under flip-chip or BGA components. Distributes mechanical stresses and increases reliability.
USP Class VI
Biocompatibility class of the US Pharmacopeia, often specified for medical-grade polymers.
UV Resistance / Lightfastness
Resistance to yellowing and degradation by UV radiation. Silicones usually have an advantage here.
UV Curing (Equipment)
Lamps or chambers that cure UV adhesives and coatings. Wavelength and dose must match the material.
UV adhesive
Cures under UV or visible light in seconds. For transparent substrates in glass, optics, and electronics, requires light access to the bond line.
V
Vacuum mixing
Mixing under vacuum to avoid air entrapment from the outset.
Vacuum potting
Casting under vacuum to avoid air inclusions. Important for high voltage and dense assemblies.
Processing temperature
Recommended temperature range for material and component during processing.
Potting compound
Curing compound based on epoxy, polyurethane, or silicone for potting. Selection based on temperature, hardness, thermal conductivity, and repairability.
Crosslinker
Component that triggers the three-dimensional network formation of silicone or resin. Type and amount influence hardness, elasticity, and curing speed.
Crosslink density
Measure of the number of network crosslinks. Higher density usually means higher hardness and lower elongation.
Vibration damping
Protection of components from vibration through elastic potting compounds and adhesives.
Viscosity
Measure of the viscosity of a fluid. Determines processing, flow, and drip behavior.
Volume Resistivity
Electrical resistance through the material volume. High values indicate good insulators.
Volumetric Dosing
Precise metering independent of pressure and viscosity, e.g., via screw or piston.
Vulcanization
Curing of a silicone or rubber into an elastic network. Depending on the system, at room temperature (RTV) or under heat (HTV).
W
Kneading Penetration
Measure of the consistency of a grease after mechanical stress.
Coefficient of thermal expansion (CTE)
Measure of how much a material expands per degree. Large differences between potting and component create stress.
Thermal Conductivity (Lambda Value)
Measure of how well a material conducts heat, in W/mK. Higher values indicate better heat dissipation.
Thermal paste
Non-curing, thermally conductive medium for the transition from component to heat sink. Apply thinly and evenly.
Water absorption
Moisture absorbed by a material. Affects insulation, mass, and strength.
Tear resistance
Resistance of an elastomer to further tearing from a notch. Important for thin-walled molds.
Shaft-Hub Connection
Anaerobic joining of cylindrical mating parts such as bearings, bushings, and shafts. Transmits high forces without a press fit.
Z
Time-pressure dispensing
Dispensing quantity based on set pressure and opening time. Simple, but dependent on temperature and viscosity.
Tensile Strength
Strength under tensile load perpendicular to the surface. Important material property of adhesives, elastomers, and resins.
Second Source
Alternative, qualified supplier for supply security, e.g., Elkem as an alternative to Dow, Wacker, or Momentive.
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