To obtain optimum heat resistance, Part A should be mixed in the conventional manner on a rubber mill, and then dissolved in the solvent system shown under "A." Part B, the resin and "Maglite" D, should be dissolved in the water and solvent system, and pre-reacted for a minimum of 6 hours prior to blending with Part A. use of "SP-154" will result in excellent heat resistance, as well as a completely non-phasing formulation. "SP-155" will produce formulations with heat resistance slightly less than "SP-154," but with longer open-time. Its phase resistance, while excellent, is not as good as SP-154.