LORD P-1291 | Krayden

Main features

RTV Silicone Adhesion Promotion
Condensation- and Addition-Cure Compatibility
30 to 60-Minute Air-Dry

Product Description

LORD® P-1291 Primer is a solvent-based primer designed for electronics applications to improve the adhesion of tin-catalyzed room-temperature vulcanized (RTV) silicone rubbers to most metals and glass. It may also be used with addition-cure silicones, providing a versatile surface treatment that promotes durable silicone bonding and superior hydrolytic stability.

Key Features

Designed to improve adhesion of RTV silicone rubbers to metals and glass.
Compatible with tin-catalyzed condensation-cure RTV silicones and addition-cure silicones.
Provides superior hydrolytic stability for long-term bond durability.
Low-viscosity liquid suitable for brush or spray application.
Forms a chalky primer film after air drying prior to silicone application.

Suitable For

Electronics assembly applications
Bonding RTV silicone rubbers to metals
Bonding RTV silicone rubbers to glass
Surface preparation prior to silicone adhesive or sealant application
Applications using addition-cure silicones

TDS, SDS & Technical Documents

Technical Specifications

General Properties

Appearance

Clear Liquid

Specific Gravity

0.85

Physical Properties

Viscosity

5 mPa.s

Thermal Properties

Flash Point

-8.33 °C

Additional Information

As-Supplied / Before-Processing Properties

Property	Value
Appearance	Clear Liquid
Viscosity	5 cP @ 25°C
Specific Gravity	0.85 @ 25°C
Flash Point	-8.33°C
Recommended Dry Film Thickness	12–25 µm
Drying Time	Air dry 30–60 minutes before applying RTV silicone
Shelf Life	1 year in original unopened container stored at 15–35°C

After-Processing / Final-State Properties

Property	Value
Primer Film Appearance	Chalky film after drying