Flexible Seal Roof Sealant.
Flexible Seal Roof Sealant fills cracks up to 1/4 inch wide and sticks firmly to steel, glass, aluminum, concrete, wood, brick, clay, tile, and asphalt - even in the rain, says the maker. Available in seven colors (including clear), the single-component, solvent-based elastomeric is sold in a 10.6-ounce cartridge for $7. The brush-grade version costs $17 a quart and $50 a gallon. Epmar Corp.,