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CAF 3

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Universal silicone sealant for general sealing and bonding applications.

Universal silicone sealant (1-component, acetic) for general sealing and bonding applications

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  • manufacturer
  • brand
  • network type
  • Number of components
  • mixing ratio
  • UV resistance
  • Paint cured
  • Self-leveling
  • consistency
  • Electrical insulation
  • food contact
  • Suitable for medical use
  • container

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High-temperature resistant Silicone CAF Bluesil Acetoxy Silicone sealant Elkem Industry Swiss warehouse 1K silicone Electrical insulation Sealing

 
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Ships from our Swiss warehouse Shipped within 24 hours Batch certificate 30-day invoice (B2B) Technical support
Shipping & Delivery

Usually 1 to 3 business days

Availability will be confirmed once the order is received.

Express logistics within Switzerland and Europe.

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Product Information

Internal reference: 40-305.TU

HS Code: 39100000

Internal reference: 40-305.TU
HS code: 39100000

CAF 3
CAF 3
CAF · Elkem Silicones · SKU 40-305.TU

CAF 3 is a universal silicone sealant (1-component, acetic) for general sealing and bonding applications.

The Elkem CAF series comprises one-component (1K), moisture-curing acetic silicone sealants—ready-to-use from the cartridge, with high resistance to temperature and chemicals. CAF 3 is designed for specific industrial applications—see below for its key properties and areas of application.

Universal sealant

CAF 3 is the standard industrial silicone sealant for general repair and maintenance applications—a one-component, acetic-curing, ready-to-use product that has proven itself in many industries.

CAF 3 by the Numbers
1K
Acetic
+200 °C
Duration
A 25
Shore hardness
universal
Application

What sets CAF 3 apart

Universal application
Standard silicone sealant for general industrial repair and maintenance.
Acetic cross-linking
1-component system, ready to use — cures with moisture in the air without a mixing system.
Good temperature resistance
Stable over a wide range of industrial temperatures.
Cost-effective choice
A proven standard for applications without special requirements.
Well-established in the industry
A long-standing favorite in workshops and service centers.
Multi-substrate adhesion
Adheres to metal, glass, ceramic, and many plastics.

What is CAF 3 used for?

Industrial Maintenance
General repair and maintenance gaskets for industrial use.
Workshop Universal
Universal adhesive/sealant for all types of workshop repairs.
Equipment Repair
Seals for industrial machinery, pumps, and tanks.
Glass seal
Seals for glass surfaces in industrial and commercial settings.
Ceramic gasket
Seals for sanitaryware and industrial ceramics.
Multi-material joints
Flexible sealant for joining different materials.
Data Sheets & Safety Data Sheets
Complete TDS and SDS in German, English, and French — view online or download.
Go to the documents →

processing

1
Prepare the substrate
Ensure that bonding surfaces are clean, free of grease, and dry—degrease them with acetone or isopropyl alcohol. On copper/zinc: Avoid the acetic acid-based variant (corrosion).
2
Cut the tip of the cartridge
Cut the tip at an angle to the desired bead cross-section. For a 310-ml cartridge: Use a standard caulking gun.
3
Apply
Apply an even bead. For sandwich bonding, apply a thin layer to both sides and join the parts immediately.
4
Smoothing (optional)
Smooth the surface with a smoothing tool or a damp putty knife while the coating is still setting.
5
curing
Skin formation typically occurs in 6–10 minutes; cross-linking reaches 2 mm in 6–8 hours; fully cross-linked after 24–72 hours. Cross-linking is accelerated by heat and higher humidity.

Recommended Accessories

Bluesil Primer 131
Universal bonding agent for stainless steel, aluminum, PMMA, and many metals.
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Bluesil ADD 11013
Thixotropic additive for Bluesil RTV 3428 (polyaddition) — vertical application.
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Important information

Substrate preparation
Ensure that the bonding surfaces are clean, free of grease, and dry. Adhesion is not possible on PE, PP, PTFE, or silicone oils. Conduct a preliminary test for critical material combinations.
Storage & Handling
Store in the unopened original container at 5 to 30 °C in a dry place, protected from direct sunlight. Consult the current SDS before opening.
Corrosion Notice (Acetic)
Acetic cross-linking can corrode copper, zinc, and galvanized steel. For metals susceptible to corrosion, choose the neutral variant (CAF 530, CAF 731, or CAF 730).
Application Consulting
SILITECH can advise you on the best CAF option for your application—substrate pairing, corrosion and temperature requirements, desired appearance, and manufacturing workflow.

CAF 3 Compared to Related CAF Products

Crosslinking, mechanics, and temperature listed side by side — all values taken from the official Elkem TDS. “— ” = not specified in the data sheet.

CAF 3
Current Product		 CAF 1 →CAF 4 →CAF 731 →
Networking System1K Acetic1K Acetic1K Acetic1K Neutral (Alkoxy)
ColorTranslucentredOff-whiteWhite
Shore A hardness26473740
elongation at break260 %200 %290 %420 %
tensile strength1.3 MPa4.4 MPa3.8 MPa3.3 MPa
tear resistance2.5 kN/m6.0 kN/m4.5 kN/m13 kN/m
skin formation time8 min7 min10 min10 min
Continuous operating temperature+200 °C+225 °C+225 °C+150 °C
Peak temperature+225 °C+300 °C+250 °C+180 °C
Main applicationIndustrial MaintenanceElectric heating elementsIndustrial MaintenanceAviation Adhesives
Topics & Areas of Application
Keywords related to this product. Also useful for our search and filter functions.
High-temperature resistant Silicone CAF Bluesil Acetoxy Silicone sealant Elkem Industry Swiss stock 1K silicone Electrical insulation Sealing

Technical Specifications for CAF 3

All 13 Product information 6 Additional features 1 Physical Properties 3 Electrical properties 1 Product approvals 2
product information
manufacturer Elkem Silicones
brand CAF
network type Single-component (relative humidity)
Number of components 1K (single-component)
mixing ratio Single-component
container 100 g
Additional features
UV resistance No
Physical properties
Paint cured Transparent
Self-leveling Yes
consistency Flowable
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 Data Sheets

Click on a document to view a preview, or click the download icon to download it directly.

Technical Data Sheets (TDS) 2
CAF 3 - Technical Data Sheet EN.pdf
803 KB
CAF 3 - Technical Data Sheet (French).pdf
66 KB
Safety Data Sheets (SDS) 4
CAF 3 - Safety Data Sheet (German).pdf
502 KB
CAF 3 - Safety Data Sheet EN.pdf
402 KB
CAF 3 - Safety Data Sheet (French).pdf
601 KB
CAF 3 - Safety Data Sheet (IT).pdf
587 KB

Frequently Asked Questions About CAF 3

Practical questions regarding application and design — answered by SILITECH.

CAF 3: Universal silicone sealant (1-component, acetic) for general sealing and bonding applications. Main applications include industrial maintenance, general workshop use, and equipment repair.

Acetic cure (acetic acid curing) means that the 1K system cures through exposure to atmospheric moisture and releases small amounts of acetic acid during curing—as indicated by its characteristic odor. Acetic systems are well-established, cost-effective industry standards that offer excellent adhesion to glass, ceramics, and many metals. Caution: Acetic acid can cause corrosion on copper, zinc, and electrogalvanized steel—use a neutral variant (e.g., CAF 530, CAF 731, or CAF 730) in these cases.

CAF 3 adheres without a primer to glass, ceramics, many metals (stainless steel, aluminum, copper for neutral variants), and numerous engineering plastics. Adhesion is not possible on PE, PP, PTFE, and silicone oils—these substrates are generally not bondable with silicone. If in doubt, we recommend conducting a preliminary test or consulting SILITECH regarding the specific material pairing.

Prepare the substrate so that it is clean, free of grease, 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 direct 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 different properties—such as different colors, different cross-linking systems (acetic vs. neutral), or different mechanical properties. If you are unsure about the best choice, we would be happy to advise you—please contact SILITECH with your requirements (substrate pairing, temperature, corrosion resistance, and appearance).

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product specifications

product information
manufacturer Elkem Silicones
brand CAF
network type Single-component (relative humidity)
Number of components 1K (single-component)
mixing ratio Single-component
container 100 g
Additional features
UV resistance No
Physical properties
Paint cured Transparent
Self-leveling Yes
consistency Flowable
Electrical Properties
Electrical insulation Yes
product approvals
food contact No
Suitable for medical use No
keywords
keywords
High-temperature resistant Silicone CAF Bluesil Acetoxy Silicone sealant Elkem Industry Swiss warehouse 1K silicone Electrical insulation Sealing
Mechanical properties
Shore A hardness26.0 Shore A
Modulus at 100% elongation0.5 MPa
tensile strength1.3 MPa
elongation at break260.0 %
Tear resistance2.5 kN/m
processing
Viscosity of the mixture140,000 mPa·s
skin formation time8.0 min
Fully cured after 24 hours4.5 mm
Mesh 2 mm layer5.0 h
Physical & Thermal
Density (23°C)1.03 g/cm³
Temperature resistance (duration)-60 to 200 °C
Peak temperature (short-term)225 °C
thermal conductivity0.2 W/(m·K)
Electrical specifications
Dielectric constant ε (1 kHz)2.7
Dielectric strength19.0 kV/mm
Forward resistance1e+15 Ω·cm
Loss factor tan δ0.002
storage
Shelf life in original packaging18 months
Storage temperature2 to 30 °C

Documents and Data Sheets

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