CRL 321 Gray Acrylic Latex Silicone 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: 321GRY) is a premium acrylic-silicone caulk engineered for glazing, window and door sealing, trim, and general-purpose sealing. The acrylic base delivers excellent adhesion, UV and oxidation resistance; added silicone improves flexibility and adhesion to glass and ceramic substrates while maintaining easy water clean-up and low shrinkage.

BASIC USES: A versatile, primerless sealant for wood, brick, glass, plastic, vinyl, plaster, drywall, metal, and ceramics. Ideal for window and door frames, siding and trim, tubs and sinks, thresholds, baseboards, and grout repair. Under controlled conditions, suitable for bedding insulating glass units and storm windows in wood frames. Rated for interior or exterior applications—odor-free, mold- and mildew-resistant, and paintable with oil or latex paints. Toolable for ~30 minutes and paintable after approximately 2 hours.

Performs through a wide temperature range: can be applied between 40°F and 120°F (4°C to 49°C) and, after full cure, withstands -17°F to 180°F (-17°C to 82°C). Designed for joints with ±10% movement when installed in a well-designed joint.

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 & PRODUCT WARNING: Not for continuous immersion. Do not expose to water or rain for at least 24 hours after application. Apply only above 40°F (4°C) and protect from freezing until fully cured. Refer to cartridge label and the Specification Data Sheet for additional limitations.

Ready to seal windows, doors, and trim with a paintable, mildew-resistant acrylic silicone caulk? Add CRL 321 (SKU: 321GRY) to your cart now.