SILTRUST™ SS4044 PRIMER (Light Yellow)
GEE28160
SILTRUST™ SS4044 – (Light Yellow) Universal Primer for Condensation-Cure Silicones
SILTRUST™ SS4044 is a one-component, ready to use, light yellow (nearly clear) primer specifically formulated to promote strong adhesion between condensation cure RTV silicone rubber compounds and difficult to bond substrates without causing discolouration. It is virtually identical in performance to the pink SS4004 primer but is designed for applications where aesthetic neutrality or substrate clarity is critical, such as in light coloured, transparent, or finished surfaces.
SS4044 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 (including aluminium, copper, steel, and brass), glass, ceramics, wood, and porous materials. Its near-clear appearance makes it ideal for use in consumer appliances, architectural assemblies, and visible industrial components where primer staining must be avoided.
Key Features
- Light yellow / nearly transparent – preserves the appearance of light or finished substrates.
- 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 visual impact.
- Fast room-temperature dry time: Ready for RTV application in 30 minutes
- Simple application by brush, wipe, or dip, ideal for precision or aesthetically sensitive processes
- Enhances bond durability on metals, glass, and porous substrates under thermal and environmental stress
Typical Applications
- Bonding silicone gaskets to visible or finished metal housings in appliances and consumer electronics
- Pre-treatment of light-colored castings or polished surfaces, where pink primer would be unacceptable
- General-purpose priming in maintenance or manufacturing, where substrate discolouration must be avoided
- Use with formed-in-place gasketing (FIPG) systems requiring reliable adhesion without visual residue
Substrate Compatibility
SS4044 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
Note: As with all solvent-based primers, test for substrate sensitivity with 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™ SS4044 – (Light Yellow) Universal Primer for Condensation-Cure Silicones
SILTRUST™ SS4044 is a one-component, ready to use, light yellow (nearly clear) primer specifically formulated to promote strong adhesion between condensation cure RTV silicone rubber compounds and difficult to bond substrates without causing discolouration. It is virtually identical in performance to the pink SS4004 primer but is designed for applications where aesthetic neutrality or substrate clarity is critical, such as in light coloured, transparent, or finished surfaces.
SS4044 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 (including aluminium, copper, steel, and brass), glass, ceramics, wood, and porous materials. Its near-clear appearance makes it ideal for use in consumer appliances, architectural assemblies, and visible industrial components where primer staining must be avoided.