The Butyl Rubber Sealant: Excellent Features: Excellent adhesion to a variety of clean surfaces Superior exterior weathering properties Easy to apply and tool Unique Formula: CRL 777 Butyl Rubber is a special sealant made with a blend of age-resistant polymers, providing excellent weathering properties in extreme temperatures. It adheres well to most clean surfaces and can withstand joint movement of ± 10% without compromising its water-tightness. It also contains a UV fighting agent for extended service life.
Recommended Uses: This sealant is recommended for exterior use and is great for adhering to wood, masonry, glass, concrete, some plastics, and metal surfaces. It is suitable for hidden areas such as under sill cans, thresholds, and around screw heads, as well as for applications between metal building panels, wall-mounted air conditioning units, under aluminum siding, and gutters. The application temperature range is 40° to 120°F (4° to 49°C), and the service temperature range is -20° to 200°F (-29° to 93°C). It requires 24 hours of drying time. Comparative Products: Similar sealants include CRL: 888, Adco: B-100, AP-77, DAP®: Butyl Flex, OSI®: SBR-100, Pecora®: BC-158, PTI: 757, PSI: 301, and Tremco®: Butyl Sealant. Technical Specifications: The product meets the
following federal specifications: TT-S-001657, Type 1, TT-C-1796A, ASTM C 1311, and AAMA 808.3-05; it is also USDA Certified.
Product Warning: This sealant is not recommended for use in sealing horizontal decks, patios, driveways, or terrace joints that are subject to abrasion or physical abuse. It is also not suitable for window glazing applications or hidden joint details that require a non-skinning, non-hardening sealant. Due to its solvent-based curing system, a slight odor of mineral spirits may be detected during application, which is normal. It should not be used in areas where this odor may cause issues, such as refrigeration units that will be stocked soon after construction. Additional limitations are listed on the cartridge label and Specification Data Sheet. Note that all colors are available in bulk packaging.