Long-lasting 100 percent RTV silicone rubber seals and bonds for automotive and marine maintenance and repair applications. Forms a strong waterproof and weatherproof seal. Stays flexible. Won’t shrink or crack. Resists vibration, expansion and contraction. Endures sunlight and withstands saltwater. 100 percent silicone formula forms a strong, waterproof sealDesigned for use with windows and hatchesMildew resistantPermanently flexibleDries to the touch in 20 minutes