When pouring multiple layers of Fathom, it is very important to wait until the previous layer has cooled sufficiently to prevent yellowing, surface distortion, or other negative consequences of excessive heat from the cure.

• Conservatively, the safest interval is to wait a minimum of 36 hours for Fathom to cure prior to applying more, regardless of pour depth and ambient temperature.
• For applications where it is important to build layers as quickly as possible, wait at least 24 hours and use an infrared thermometer to measure the temperature at the center of the epoxy mass, where the highest temperature will be recorded.
• The previous layer should be below 85°F and firm enough that it will not distort when more epoxy is poured over it.
• Always follow the maximum pour depth based on the volume of Fathom in the technical data sheet.