We plan to repair concrete with an epoxy bonding agent but the temperature of the concrete may be too low to be sure of a good job. Is there a good way to warm it?
It is normally a good idea to make certain that the concrete is warm enough so that the surface temperature will not drop below 65°F during the first 4 hours after applying the epoxy. It may be necessary to preheat for several hours with radiant heaters. Another effective way is to use a gas-fired weed burner to warm the surface. The concrete temperature should not be allowed to exceed 200°F at any time during preheating, and it should not be allowed to be higher than 105°F at the time of placing. There are some epoxy bonding agents on the market that are said to be effective even when applied at relatively low temperatures.