Description
CHT QSil Primer #7 Slight Yellow Silicone Primer is an adhesion aid for silicone elastomers used on electronics assemblies and other non-porous parts. The one-component liquid is carried in heptane, dries fast, and leaves a reactive surface layer that helps silicone bond to prepared substrates.
QSil Primer #7 Benefits
- Designed for addition-cure silicone formulations and compatible condensation-cure systems.
- Coats a wide variety of clean, dry substrates used in electronics manufacturing.
- Transparent to pale yellow appearance helps operators see the applied primer film.
- One-part format keeps priming simple at the bench or production cell.
- Heptane carrier flashes off quickly when parts are handled with the correct ventilation and process controls.
This primer fits assemblies where silicone must stay attached to a difficult surface through movement, vibration, or thermal cycling. Use it after the bonding area has been cleaned of grease, oil, dust, and release residue. Apply a thin film by wipe, brush, or another controlled method, then allow the solvent carrier to dry before dispensing the silicone. A light, even primer layer is usually better than flooding the part.
Common Applications for QSil Primer #7
- Electronic module sealing before addition-cure silicone potting.
- Silicone bonding to glass, metal, ceramic, and selected plastic housings.
- Primer work for sensors, LED assemblies, connectors, and display components.
- Process trials where a silicone elastomer needs stronger attachment to a non-porous surface.
Compatible Materials and Handling Notes
- Use on clean, dry, non-porous surfaces after a small test confirms compatibility.
- Keep the container closed between uses to limit solvent loss and contamination.
- Confirm primer dry time and silicone cure behavior on production parts before release.
- Do not apply over uncured release agents, oils, or shop dust.
Technical Specifications
| Property | Value |
|---|---|
| SKU | QTM-PRIMER#7 |
| Product type | One-component silicone primer |
| Carrier | Heptane |
| Appearance | Colorless to pale yellow liquid |
| Cure type | Moisture-assisted condensation reaction after solvent flash |
| Flash point | -13 C |
| Primary use | Primer for silicone adhesion to prepared substrates |
Packaging and Ordering
Order this primer when a silicone bonding process needs better attachment on clean, non-porous parts. Browse related primers and accelerators, and review manufacturer background from CHT.
Need Help?
Need help matching primer selection to a silicone elastomer, substrate, or dry-time process? Call (800) 220-1966 or email [email protected].
