FAQ.
Frequently asked questions about silicones, adhesives, potting compounds, and lubricants, answered professionally and concisely: from RTV-1 and RTV-2 to anaerobic threadlocker and NSF H1 lubricant. The technical data sheets remain binding for product selection; our team is available to assist with any further questions.
Answer
Frequently Asked Questions
What is the difference between RTV-1 and RTV-2?
RTV-1 comes ready-to-use from the cartridge and cures with atmospheric moisture from the outside in: ideal for sealing and bonding in limited layer thicknesses. RTV-2 is mixed from two components and cures throughout its entire volume: the first choice for mold making, formwork, and potting. Details and selection criteria can be found in the Silicones section.
Which Shore hardness is the right one?
As a rule of thumb: Shore A 10 to 30 for flexible molds and seals, Shore A 40 to 60 for general-purpose applications, and Shore A 70 and above for dimensionally stable and abrasion-resistant parts. Crucial factors are load, resilience, demoldability, and geometry.
Which adhesive bonds metal without welding?
Two-component epoxies or MMA structural adhesives are used; for threaded and shaft-hub connections, anaerobic adhesives are employed. Bonds withstand shear significantly better than peeling: design, surface preparation, and suitability testing on original parts determine the outcome.
When anaerobic, when epoxy
Anaerobic bonding in narrow metal gaps: screw locking, fits, thread sealing. Epoxy for structural surface bonding, even across different materials and in larger gaps.
Epoxy, silicone or polyurethane, which should I choose?
In simplified terms: epoxy for strength and media resistance, polyurethane for tough, impact-resistant potting compounds, silicone for temperature fluctuations, UV exposure, and repairable electronics. The decisive factor is the requirements profile as shown in the datasheet comparison.
What does thermally conductive mean?
Filled potting compounds dissipate heat from components; the key parameter is thermal conductivity in W/mK. The higher the value, the better the heat dissipation, but usually also the higher the viscosity and stiffness of the system.
When to use silicone lubricant, and when to use PFPE lubricant?
Silicone lubricants for material-friendly standard applications on plastics and elastomers, such as O-rings and fittings. PFPE is used when chemicals, high temperatures, or oxygen preclude the use of conventional oils. Compatibility and temperature range are detailed in the data sheet.
What is an H1 lubricant?
An NSF H1 registered lubricant may be used where occasional, technically unavoidable food contact is possible, such as on conveyor chains or filling lines. This registration is product-specific and does not replace approval for continuous contact.
contact
Question not answered?
Describe the application, material, and load. Our technical team will review suitable products, data sheets, and possible alternatives.