The Sashco Lexel is an elastomeric synthetic rubber caulk that provides more elasticity than silicone caulk and resists mildew in damp environments for indoor and outdoor applications, such as filling or sealing gaps or cracks up to 2" wide in kitchen and bathroom fixtures, backsplashes, windows, doors, trim, siding, vents, air conditioners, and ductwork. The caulk can be applied to wet and dry surfaces, and it is paintable with latex and oil-based paints, stains, and primers. SpecificationsMaximum widthUp to 2" wideApplication temperature range0 to 120 degrees F (-18 to +49 degrees C)Service temperature range-30 to +200 degrees F (-34 to +93 degrees C)Begins to harden30 minutesTime until cured1 week (dependent on temperature, humidity, and bead size)Compatible materialsWood, brick, ceramic tile, concrete, metal, glass, fiberglass, mortar, stucco, many plasticsPaintabilityPaintable with latex paints, stains, and primers after 24-48 hours; paintable with oil-based paints, stains, and primers after 3-4 weeksVolatile organic compounds (VOC)384 to 395 g/L Caulks and sealants are adhesive materials that fill and seal gaps and cracks to keep out water and air. Water-based acrylics can be painted, can be cleaned with water, and require less surface preparation than solvent- and silicone-based caulks and sealants. Water-based acrylic caulks and sealants have less of an odor than solvent- and silicone-based products. Solvent- and silicone-based caulks and sealants are generally more flexible than acrylics and can withstand more sunlight and temperature extremes. They require solvents to clean, are more difficult to remove than acrylics, and generally cannot be painted. Water-based acrylic caulks and sealants with added silicone offer a variety of features, depending on the specific formula.Sashco manufactures caulks and sealants. The company, founded in 1936, is headquartered in Brighton, CO.