Lanco 1 Qt. Siliconizer Crack Filler Smooth Brush Grade Smooth Brush Grade for Permanent Water Resistant Adhesion

Siliconizer Crack Filler Is a 100% elastomeric, styrene/acrylic, silicone modified white mastic for interior and exterior use. Will permanently seal leaks and bridge cracks on smooth surfaces. A flexible mastic that will adhere to any surface and fill cracks of any size. Will not crack, peel or crumble even after exposure to severe weather conditions.