Waterproofs, seals and insulates; will not chip, crack or crumble, stays flexible from -65 to 400 deg F. Adheres to wood, masonry, metal, glass, plastic and fiberglass. 6 to 8 min working time. 45 to 60 min tack-free time, 24 hr cure time. Expose to water in 3 hours. 100% silicone rubber.