Gasket Sealant All Purpose Sealant 4 oz. Black Temp Range -90 Degrees to 450 Degrees F Specific Gravity 0.85 Viscosity Paste Flash Point 175 Degrees F Begins to Harden Immediate Substrates Aluminum Black Iron Brass Copper Stainless Steel Galvanized Steel and On Plastics Including PVC Flexible Seal Which Will Not Harden Crack Crumble or Shrink Improves Seal on Threads Standards NSF 61 MIL-S-45180 D Includes Brush in Cap