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CAF 1 silicone elastomer

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High-temperature resistant 1K silicone adhesive (red)

High-temperature silicone sealant (1K, red, acetic) for engine gaskets and heating elements

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  • Manufacturer
  • Networking type
  • Number of components
  • consistency
  • Mixing ratio
  • UV resistance
  • Paint has hardened
  • Self-leveling
  • Electrical insulation
  • Food contact
  • Suitable for medical use
  • Container

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High-temperature resistant red silicone CAF BLUESIL Acetoxy silicone sealant ELKEM industrial Swiss bearing 1K silicone motor motor sealant heating element aviation +300°C electrical insulation

 
General Terms and Conditions.

Shipping usually within 1 to 3 business days
(availability will be confirmed after ordering)

. Express logistics. Fast and reliable within Switzerland & Europe.

Shipping from Swiss warehouse within 24 hours. Batch certificate. Invoice within 30 days (B2B). Technical support.
Shipping & Delivery

Usually 1 to 3 working days

Availability will be confirmed after order receipt.

Express logistics within Switzerland & Europe.

General Terms and Conditions →

Product data

Internal reference: 40-301.TU

HS code: 39100000

Internal reference: 40-301.TU
HS code: 39100000

CAF 1 silicone elastomer
CAF 1 silicone elastomer
CAF · Elkem Silicones · SKU 40-301.TU

CAF 1 silicone elastomer is a high-temperature silicone sealant (1K, red, acetic) for engine sealing and heating elements.

The Elkem CAF range comprises one-component (1K), moisture-curing silicone sealants – ready-to-use from the cartridge, with high temperature and chemical resistance. CAF 1 is tailored to specific industrial applications – the most important properties and areas of application are listed below.

Peak temperature up to +300 °C

CAF 1 can be used continuously at +225 °C and withstands temperature peaks up to +300 °C — the established choice for engine seals, electrical heating elements and maintenance applications in aviation and automotive aftermarket.

CAF 1 in numbers
+225 °C
Length of time
+300 °C
Peak
A 47
Shore hardness
7 min
Skin formation

What makes CAF 1 stand out

Excellent temperature resistance
+225 °C continuous, +300 °C peak — the established choice for hot industrial seals.
Rapid skin formation
Skin formation time 7 min — fast processing times in repair and maintenance.
High chemical resistance
Resistant to many aggressive industrial chemicals.
Self-fluidizing variant (Extra Fluid)
CAF 1 Extra Fluid with 7,500 mPa·s — flows into complex geometries and hard-to-reach places.
Acetic Cure
Cross-linked by humidity — no potting time, ready to use.
Proven in Aerospace, Automotive
Established manufacturer standard in maintenance and repair for decades.

What is CAF 1 used for?

Electric heating elements
Sealing of heating cartridges, heating sleeves and electric heaters with high temperature requirements (CAF 1 Extra Fluid).
Aftermarket engine gaskets
In-situ seals in automotive maintenance and service — valve covers, oil pans, gearbox housings.
Aviation maintenance
General maintenance applications in aircraft engineering with high temperature and vibration requirements.
Industrial repair
Repair seals on hot systems — pumps, turbines, industrial furnaces.
Fast repairs
Skin formation time 7 minutes for rapid repair workflows with short waiting times.
Hot water and steam systems
Seals on boilers, heat exchangers and steam pipes.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

processing

1
Prepare the substrate
Clean, grease-free, and dry bonding surfaces — degrease with acetone or isopropanol. On copper/zinc: avoid the acetic acid variant (corrosion).
2
Cut the cartridge tip
Cut the tip at an angle to the desired cross-section of the bead. For 310 ml cartridges: Use a standard cartridge gun.
3
Apply
Apply an even bead. For sandwich bonding, apply a thin layer to both sides and join immediately.
4
Smoothing (optional)
Smooth with a smoothing tool or moistened spatula during the skin formation time.
5
Curing
Skin formation typically takes 6–10 minutes, cross-linking reaches 2 mm in 6–8 hours, and is fully cross-linked after 24–72 hours. Cross-linking is accelerated by heat and higher humidity.

Recommended accessories

Bluesil Primer 131
Universal adhesion promoter for stainless steel, aluminum, PMMA and many metals.
View product →
Bluesil ADD 11013
Thixotropy additive for Bluesil RTV 3428 (polyaddition) — vertical application.
View product →

Important instructions

Substrate preparation
Prepare bonding surfaces to be clean, grease-free, and dry. Adhesion is not possible on PE, PP, PTFE, and silicone oils. Conduct a preliminary test for critical material pairings.
Storage & Handling
Store in the unopened original container at 5 to 30 °C in a dry place, protected from sunlight. Consult the current SDS before opening.
Corrosion warning (Acetic)
Acetic crosslinking can attack copper, zinc, and galvanized steels. For corrosion-sensitive metals, choose the neutral variant (CAF 530, CAF 731, or CAF 730).
Application advice
SILITECH will advise you on the optimal CAF variant for your application — substrate pairing, corrosion and temperature requirements, desired appearance and processing workflow.

CAF 1 compared to related CAF products

Networking, mechanics, and temperature directly next to each other — all values ​​from the official Elkem TDS. “— " = not specified in the datasheet.

CAF 1
Current product		 CAF 3 →CAF 4 →CAF 731 →
Networking system1K Acetic1K Acetic1K Acetic1K Neutral (Alkoxy)
ColorRedTranslucentBroken whiteWhite
Shore A hardness47263740
Elongation at break200 %260 %290 %420 %
Tensile strength4.4 MPa1.3 MPa3.8 MPa3.3 MPa
Tear resistance6.0 kN/m2.5 kN/m4.5 kN/m13 kN/m
Skin formation time7 min8 min10 min10 min
Continuous operating temperature.+225 °C+200 °C+225 °C+150 °C
Peak temperature+300 °C+225 °C+250 °C+180 °C
Main applicationElectric heating elementsIndustrial maintenanceIndustrial maintenanceAviation bonding
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
High-temperature resistant red silicone CAF BLUESIL Acetoxy silicone sealant ELKEM industrial Swiss bearing 1K silicone motor motor sealant heating element aviation +300°C electrical insulation

Technical data for CAF 1 silicone elastomer

All 13 product information 7 Further properties 1 Physical properties 2 Electrical properties 1 Product approvals 2
Product information
brand CAF
Manufacturer Elkem Silicones
Networking type Single-component (humidity)
Number of components 1K (single-component)
consistency Paste
Mixing ratio Single-component
Container 100 g
Other features
UV resistance No
Physical properties
Paint has hardened Red
Self-leveling No
Electrical properties
Electrical insulation Yes
Product approvals
Food contact No
Suitable for medical use No

For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.

Documents and datasheets

Click on a document for a preview or the download icon for a direct download.

Technical Data Sheets (TDS) 3
CAF 1 - Technical Data Sheet DE.pdf
205 KB
CAF 1 - Technical Data Sheet EN.pdf
561 KB
CAF 1 - Fiche Technique FR.pdf
200 KB
Safety Data Sheets (SDS) 4
CAF 1 - Safety Data Sheet DE.pdf
488 KB
CAF 1 - Safety Data Sheet EN.pdf
440 KB
CAF 1 - Fiche de Sécurité FR.pdf
585 KB
CAF 1 - Scheda di Sicurezza IT.pdf
572 KB

Frequently Asked Questions about CAF 1

Practical application and design questions — answered by SILITECH.

CAF 1 Silicone Elastomer: High-temperature silicone sealant (1K, red, acetic) for engine gaskets and heating elements. Main applications include electric heating elements, aftermarket engine gaskets, and aviation maintenance.

Acetic cure (acetic acid crosslinking) means that the 1K system crosslinks through atmospheric moisture and releases small amounts of acetic acid during curing—recognizable by its characteristic odor. Acetic systems are established, economical industry standards with excellent adhesion to glass, ceramics, and many metals. Caution: Acetic acid can cause corrosion on copper, zinc, and electroplated steels—use a neutral variant (e.g., CAF 530, CAF 731, or CAF 730) for these materials.

CAF 1 adheres without primer to glass, ceramics, many metals (stainless steel, aluminum, copper in neutral variants), and numerous engineering plastics. Adhesion is not possible to PE, PP, PTFE, and silicone oils—these substrates are fundamentally incompatible with silicone. If in doubt, we recommend a preliminary test or consulting SILITECH regarding the specific material pairing.

Prepare the substrate to be clean, grease-free, and dry. Apply the sealant evenly from the cartridge or container—refer to the TDS for skin formation and curing times. Store in the unopened original container at 5 to 30 °C, protected from sunlight. Use opened containers promptly—for Acetic systems, reseal tightly immediately after opening. Consult the current Safety Data Sheet (SDS) before use.

In the comparison table above, you will find related CAF products with adapted properties—different color, different crosslinking system (acetic vs. neutral), or different mechanical properties. If you are unsure about the optimal choice, we would be happy to advise you—contact SILITECH with your requirements (substrate pairing, temperature, corrosion requirements, appearance).

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Product specifications

Product information
brand CAF
Manufacturer Elkem Silicones
Networking type Single-component (humidity)
Number of components 1K (single-component)
consistency Paste
Mixing ratio Single-component
Container 100 g
Other features
UV resistance No
Physical properties
Paint has hardened Red
Self-leveling No
Electrical properties
Electrical insulation Yes
Product approvals
Food contact No
Suitable for medical use No
Keywords
Keywords
High-temperature resistant red silicone CAF BLUESIL Acetoxy silicone sealant ELKEM industrial Swiss bearing 1K silicone motor motor sealant heating element aviation +300°C electrical insulation
Mechanical properties
Shore hardness A47.0 Shore A
Modulus at 100% elongation2.0 MPa
Tensile strength4.4 MPa
Elongation at break200.0 %
Tear resistance6.0 kN/m
processing
Viscosity of mixture250,000 mPa·s
Flowability5.0 min
Skin formation time7.0 min
Fully cured after 24 hours4.3 mm
Crosslinking 2 mm layer6.0 h
Physical & Thermal
Density (23°C)1.15 g/cm³
Temperature resistance (duration)-65 to 225 °C
Peak temperature (short-term)300 °C
thermal conductivity0.3 W/(m·K)
Electrical characteristics
Dielectric constant ε (1 kHz)3.0
Dielectric strength20.0 kV/mm
Contact resistance1e+15 Ω·cm
Loss factor tan δ0.003
storage
Shelf life in original packaging24 months
Storage temperature2 to 30 °C

Documents and datasheets

Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: