Service Temperature: Temperatures <20°F will cause the epoxy to contract and become brittle. Maximum continuous service temperature is 250°F and maximum intermittent temperature is 300°F. Exceeding these temperatures will cause the epoxy putty to become soft and expand. Effect of temperature extremes on fully cured epoxy sticks: 1) At <4°F the epoxy putty becomes more brittle and less flexible. Adhesion strength is not significantly affected. 2) At 176°F the epoxy putty softens. Adhesion strength is not significantly affected. 3) >194°F causes significant softening of the epoxy putty and this would affect the adhesive strength of the epoxy putty.