The recommended ambient application temperature for TotalBoat Fathom epoxy should be 65-75°F for slab pours up to 2", or castings with a maximum pour depth of 3". For slab pours that are under 1", or castings that are less than 1.5" in depth, it is recommended to maintain an ambient temperature of 70-80°F.
Once Fathom has reached its peak exotherm, the ambient temperature for all applications can be increased to 90°F to help promote a faster cure rate as the epoxy hardens.