Lanco 1 Gal Siliconizer Roof Crack Cement

Lanco 1 Gal Siliconizer Roof Crack Cement is a 100% elastomeric styrene/acrylic, silicone-modified, super flexible white mastic designed to permanently seal any leak, bridge and fill any crack, large or small. Excellent for both interior and exterior use. This product is odor-free, 100% sandable and paintable and is made of a non-yellowing formula. Mildew resistant with easy water clean-up.