• Suitable for Glazing Insulating Glass Units in Wood Frames
• For Exterior or Interior Use
• Paintable with Oil or Latex Based Paints
• Mildew Resistant

This CRL 321 Acrylic Latex with Silicone is a premium quality acrylic caulk with silicone, featuring outstanding properties including adhesion, weather resistance, low shrinkage, water clean-up, and more. The acrylic base offers outstanding adhesion and resistance to oxidation and ultraviolet rays. The silicone feature improves the flexibility and adhesion to ceramic and glass substrates.


BASIC USES: This Acrylic Latex with Silicone is truly a versatile caulk featuring easy tooling and water clean-up. A special blend of silicone and acrylic latex that provides superior primerless adhesion to building materials such as wood, brick, glass, plastic, vinyl, plaster, drywall, metal, and ceramics. The silicone gives it flexibility, the acrylic promotes long life expectancy. Together they form an excellent sealant that can be used around window and door frames, for siding and trim work, caulking tubs and sink tops, thresholds and baseboards. It may be used to grout marble and ceramic tile, repair mortar joints, and, under controlled conditions, to bed insulating glass units and storm windows.

It can be used for interior or exterior applications since it is odor free and offers superior weatherability. Capable of ±10% joint movement in a well-designed joint. Can be applied at outdoor temperatures as low as 40°F to 120°F (4° to 49°C), and withstands extreme temperatures after full cure from 0°F to 180°F (-17° to 82°C). CRL 321 can be used in areas with high moisture, such as showers, bathrooms, sinks and kitchens, since it is mold and mildew resistant, and is paintable with oil or latex based paint. CRL 321 can be tooled for approximately 30 minutes, and can be painted over after two hours with oil or latex based paints.

TECHNICAL DATA: Exceeds the requirements of ASTM C-834-00 Standard Specification for Latex Sealing Compounds, ASTM C-920 and TT-S00230C Meets California Air Resources Board 2003 requirements for Volatile Organic Compound (VOC) content. Qualifies for LEED® (Leadership in Energy and Environmental Design) Green Building Rating System™ credit.

LIMITATIONS: Should not be used in applications that will be immersed in water. Should not be exposed to water or rain for at least 24 hours. Always apply when temperatures are above 40°F (4°C). Protect from freezing until fully cured. Check cartridge label and Specification Data Sheet for additional limitations.


Product Warning:

Should not be used in applications that will be immersed in water. Should not be exposed to water or rain for at least 24 hours. Always apply when temperatures are above 40°F (4°C). Protect from freezing until fully cured. Check cartridge label and Specification Data Sheet for additional limitations.