Aremco-Bond 657 is a stainless steel-filled, two-part (1:1) high temperature epoxy paste for special purposes to 400°F (204°C). Provides high corrosion resistance.Aremco-Bond 657 should be mixed thoroughly in 1:1 ratio (by weight) to a uniform consistency. Requires curing for 2 hours at 200°F (recommended) or for 24-48 hours at room temperature. In most cases, the epoxy should be applied to both surfaces maintaining a glue line of less than 10 mils.On the picture Pyro-Putty 657 repairs defects in cast iron.