Sikaflex-505UV Caulk offers excellent UV and weathering resistance to a wide variety of substrates with little or no surface prep. This one-component STP sealant contains no solvents or isocyanates and is non-yellowing. Tack-free in just 60 minutes. SPECIFICATIONS:* Weight: 1.2 lbs.* Manufacturer: AP Products* Model#: 017-415763 Requires little or no surface prep Contains no solvents or isocynates Non-yellowing; tack-free in 60 minutes | AP Products Sikaflex 505 UV Caulk - White