<p>Waterproofs, seals and insulates; will not chip, crack or crumble, stays flexible from -65 to 400 degrees Fahrenheit. Adheres to wood, masonry, metal, glass, plastic and fiberglass. 6-8 minute working time. 45-60 minute tack free time, 24 hour cure time. Expose to water in 3 hours. 100-percent silicone rubber.</p>