Description
Momentive SilTrust™ SS4044P Primer is a high-performance, one-component adhesion promoter engineered to enhance the bond strength of RTV silicone rubber adhesives and sealants on hard-to-bond substrates. Designed specifically for applications where substrate discoloration is undesirable, SS4044P offers exceptional clarity and uniform adhesion promotion without affecting surface appearance.
This transparent primer is virtually identical in formulation to Momentive’s pink SS4004P primer, sharing its adhesion performance while offering an aesthetic advantage for visible or sensitive substrates. It is ideal for use on metals (including aluminum, copper, stainless steel, brass, galvanized steel), unglazed ceramics, porous materials, and wood. Its compatibility with both one- and two-part condensation-cure RTV systems makes it a versatile choice for a wide range of industrial bonding applications.
Key Features & Benefits
-
One-component formulation – Ready to use with no mixing required, reducing processing time and waste.
-
Transparent appearance – Maintains the original look of substrates; ideal where visibility or aesthetics are critical.
-
Broad substrate compatibility – Enhances adhesion to metals, ceramics, porous materials, and wood.
-
Room temperature drying – Cures under ambient humidity with no need for ovens or heat-assisted drying.
-
Low processing cost – Easily applied by brush, dip, or wipe with minimal equipment.
-
Reliable performance – Supports strong and durable silicone-to-substrate bonds across demanding environments.
-
FDA-compliant – Can be used in applications where FDA regulations apply, enhancing versatility for regulated environments.
Typical Applications
-
Industrial assembly – For sealing and bonding metal or ceramic housings, enclosures, or panels.
-
Electronics encapsulation – Used as a pre-treatment for substrates in conformal coating or potting operations.
-
Appliance and HVAC manufacturing – Enhances sealant bonding to metal chassis or enclosures.
-
Lighting and optics – Where transparent bonding or sealing is required without visual disruption.
-
Medical and food processing equipment – Where FDA-compliant adhesives are necessary.
Technical Specifications
| Property | SS4044P Primer |
|---|---|
| Color | Light Yellow / Transparent |
| Specific Gravity | 0.85 |
| Solids Content | 15% |
| Solvent System | Acetone, Isopropanol, Xylene, n-Butanol |
| Flash Point (PMCC) | -12°C (10°F) |
| Dry Time | ~30 minutes |
| Application Methods | Brush, Wipe, Dip (Spraying not recommended) |
| Recommended RTVs | 1- & 2-Part Condensation Cure |
| Humidity for Drying | ≥25% RH |
| Shelf Life | 12 months (in original unopened container @ ≤27°C / 80°F) |
| FDA Status | Approved for food contact use |
Compliance & Safety
-
FDA Compliance: SS4044P meets FDA requirements for certain food-contact applications, adding utility in regulated industries.
-
DOT Labeling: Classified as flammable; proper storage and safety protocols must be followed.
-
Handling Guidance: Avoid shaking the container. Decant clear primer only and apply in a thin, uniform coat of 0.01–0.02 mm (~0.5 mil) for optimal performance. Ensure surfaces are clean and dry, using isopropanol or MEK for preparation.
Competitive Advantages
-
Aesthetic Superiority: Unlike many adhesion primers that stain or alter substrates, SS4044P preserves substrate color, making it ideal for exposed or clear-bond applications.
-
Application Flexibility: Offers broad application across diverse materials and processing environments.
-
Trusted Brand: Backed by Momentive’s decades of silicone innovation and reliability in industrial environments.
-
Reduced Inventory Complexity: Compatible with multiple RTVs and surfaces, allowing manufacturers to standardize across lines.
Reviews
There are no reviews yet.