Top Pick Loctite 587 Blue High Performance RTV Silicone Gasket Maker is a one part, formed-in-place, RTV silicone that forms tough, flexible gaskets directly on the flange. Recommended for sealing all types of flanges including stamped sheet metal. Designed for superior bonding properties to oil-contaminated metals. Low odor, non-corrosive, low volatility. Withstands temperatures to 500F (260C) intermittent. Resistant to most chemicals and solvents. Fills gaps to 0.010" (0.25 mm). ABS Approved NSF/ANSI P1 Certified.