CRL Bronze 321 Acrylic-Latex Silicone Caulk - Paintable Sealant

• Suitable for glazing insulating glass units in wood frames
• For exterior or interior use
• Paintable with oil or latex based paints
• Mildew resistant

CRL 321 Acrylic Latex with Silicone (SKU: 321BRZ) is a premium acrylic-latex caulk enhanced with silicone for improved flexibility and adhesion to glass and ceramic. It combines acrylic’s long-term resistance to oxidation and UV with silicone’s flexibility for a durable, weather-resistant seal. Water clean-up and low shrinkage make it easy to use.

Key features & long-tail benefits:

• Primerless adhesion to wood, brick, glass, plastic, vinyl, plaster, drywall, metal, and ceramics
• Suitable for glazing insulating glass units and storm windows in wood frames
• Mildew-resistant, paintable caulk for showers, bathrooms, sinks, kitchens, window and door frames, siding, trim, thresholds, and baseboards
• Easy tooling and water cleanup; can be tooled for approximately 30 minutes
• Paintable after two hours with oil or latex paints
• Capable of ±10% joint movement in a well-designed joint

Performance & application conditions: Apply in temperatures between 40°F and 120°F (4°C to 49°C). After full cure, withstands temperatures from 0°F to 180°F (-17°C to 82°C). Suitable for interior and exterior use; odor-free and weatherable. Not for continuous immersion.

Technical data: Exceeds ASTM C-834-00 for latex sealing compounds and meets ASTM C-920 and TT-S-00230C. Meets California Air Resources Board 2003 VOC requirements and qualifies for LEED® credit.

Limitations & warnings: Do not use where the product will be continuously immersed. Protect from water or rain for at least 24 hours after application. Always apply when temperatures are above 40°F (4°C) and protect from freezing until fully cured. Check cartridge label and the Specification Data Sheet for additional limitations.

Order CRL 321 Acrylic Latex with Silicone (SKU: 321BRZ) for a paintable, mildew-resistant sealant ideal for glazing insulating glass and general exterior/interior caulking — add to cart now