515 gasket flange sealant seals to 400 degrees F (204 degrees C) and fills gaps to 0.050 in. (1.27 mm) with primer. 50 mL tube. 515 gasket flange sealant seals to 400 degrees F (204 degrees C) and fills gaps to 0.050 in. (1.27 mm) with primer. 50 mL tube. Features Sensor safe with chemical resistance Adds structural rigidity to flanges and eliminates gasket compression set problems Medium strength Temperature range: -55°C to +200°C Specifications Approved to AGA No. 2590 up to 690kPa (100psi) Loctite® 577™ Thread Sealant is a medium strength, general purpose sealant for use on coarse- threaded components. Particularly suitable for use on stainless steel without the need for surface activation. LOCTITE® SI 5970 is a silicone sealant and cures on exposure to moisture in the air to form a tough rubber gasket. The product is designed primarily for flexible flange sealing. It is ideally used where high vibration or flexing occurs. It is tack-free after just 25 min. Buy Loctite 574 Flange Sealant - 50 ml: Gasket Sealants - Amazon.com FREE DELIVERY possible on eligible purchases Loctite SI 5900 heavy body RTV silicone flange sealant is a one-part RTV silicone that has superior flexibility and adhesion. Provides instant seal. Excellent fluid resistance. Non-corrosive, low odor, low volatility. Black in color.