SILTRUST™ SS4004 PRIMER (Pink)
GEE28159
SILTRUST™ SS4004 – (Pink) Universal Primer for Condensation Cure Silicones
SILTRUST™ SS4004 is a one-component, ready-to-use, bright pink primer specifically designed to promote strong adhesion between condensation-cure RTV silicone rubber compounds and a wide range of difficult-to-bond substrates. Its vivid pink colour provides immediate visual confirmation of uniform coverage, ensuring consistent application in manufacturing environments where process control and dependability are critical.
SS4004 is a solvent-based, medium-solids (15%) primer that dries at room temperature to form a reactive film that significantly enhances silicone bonding to metals, porous materials, ceramics, and wood. It is especially recommended for use with Momentive’s one- and two-component condensation-cure RTV systems (e.g., RTV100 Series, RTV500 Series, RTV8000 Series) when maximum adhesion to non-silicone surfaces is essential.
Key Features
- Bright pink colour enables easy visual verification of complete, even primer application.
- Optimized for condensation-cure RTVs – ideal for RTV102, RTV106, RTV1473, RTV157, RTV159, and similar acetoxy-cure systems
- Medium-solids formulation (15%) delivers robust adhesion with minimal overspray or residue.
- Fast room-temperature dry time: Ready for RTV application in 30 minutes
- Simple application by brush, wipe, or dip—ideal for manual or semi-automated processes
- Enhances bond durability on metals, glass, wood, and unglazed ceramics under thermal and environmental stress
Typical Applications
- Bonding silicone gaskets to aluminium or steel housings in automotive, appliance, and industrial equipment
- Pre-treatment of castings, machined parts, or porous substrates prior to RTV sealing
- General-purpose priming in maintenance, repair, and manufacturing, where visual process control is needed
- Use with formed-in-place gasketing (FIPG) systems requiring reliable adhesion to metal flanges.
Substrate Compatibility
SS4004 is recommended for use on:
- Metals (aluminium, copper, steel, stainless steel, brass, galvanised steel)
- Unglazed ceramics and glass
- Wood and other porous materials
- Certain rigid thermoplastics (compatibility testing advised)
Note: As with all solvent-based primers, test for substrate sensitivity to some plastics (e.g., polycarbonate, ABS) may craze. Apply with a single, smooth stroke to minimise risk.
Technical Notes
- Solvent system: Acetone, isopropanol, xylene, n-butanol
- Flash point: –12°C (10°F) – highly flammable
- Dry time: 30 minutes at 25°C (77°F) and ≥25% RH
- Film thickness: 0.01–0.02 mm (0.5 mil) recommended
- Storage: Keep container tightly closed
- Compatible with brush, wipe, or dip application methods.
- Not recommended for spray application due to high volatility.
Certifications & Compliance
- FDA compliant – suitable for use in food-contact applications per FDA regulations
Packaging Options
- Available in a standard solvent-resistant bottle.
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SILTRUST™ SS4004 – (Pink) Universal Primer for Condensation Cure Silicones
SILTRUST™ SS4004 is a one-component, ready-to-use, bright pink primer specifically designed to promote strong adhesion between condensation-cure RTV silicone rubber compounds and a wide range of difficult-to-bond substrates. Its vivid pink colour provides immediate visual confirmation of uniform coverage, ensuring consistent application in manufacturing environments where process control and dependability are critical.
SS4004 is a solvent-based, medium-solids (15%) primer that dries at room temperature to form a reactive film that significantly enhances silicone bonding to metals, porous materials, ceramics, and wood. It is especially recommended for use with Momentive’s one- and two-component condensation-cure RTV systems (e.g., RTV100 Series, RTV500 Series, RTV8000 Series) when maximum adhesion to non-silicone surfaces is essential.