The remarkable bonding properties of QUICK ROOF EXTREME'S Steel-Loc Adhesive are the result of its proprietary blending of unique synthetic co-polymers and butyl rubber. It can be installed without the need for primer at temperatures as low as 20 Degree Fahrenheit , and keeps on sticking from -70 Degree Fahrenheit to 200 Degree Fahrenheit. QUICK ROOF EXTREME is guaranteed not to crack, harden, or shrink. It instantly stops leaks and permanently repairs: all RV roof materials, vents, skylights, slide-outs, windows, awnings, holding tanks, tents and more.