Clear silicone caulking.
AM Conservation Group’s weatherization sealant product is 100% silicone. This energy efficient sealant remains permanently flexible, will not shrink or crack, is waterproof and can be applied in temperatures of -30 to 140 degrees. Withstands temperatures of 400 degrees Fahrenheit. This weatherization product is ideal for windows, doors, sills, baseboards and other gaps and openings where a long lasting professional grade sealant is needed. Meets the performance requirements of specification MIL-A-46106, TT-S001543A (COM-NBS) Class A, TTS-00230C (Class A ASTMC920-79), Type S grade NS, Class 25, DOE, USDA and FDA requirements.
Apply it using a caulking gun like the one we sell.
Ships to US lower 48 only.