How does GE Silicone II Window and Door with BioSeal save you money and hassle of repairing water damage? By combining silicone"s low shrinkage, maximum UV resistance and perma-flex properties with better adhesion, lower odor, and greater surface compatibility. Silicone II Window and Door is the gold standard in the sealant category. For sealing interior and exterior windows, replacing windowpanes, sealing cracks in the door jam or window seal. Outstanding adheres to a broad range of surfaces: wood, masonry, metal, glass, vinyl siding, drywall/plaster and plastic.