Compounds of this type have been tested in an air oven for 96 hours at 180'F., in a weatherometer for twenty cycles, in 45'F. southern exposure for 20 months, and in service for over a year. The results show excellent adhesion and retention of bond with no surface hardening or tendency to crack. Shrinkage was only slight with no tendency to crack or pull away from the surface.
地址：山东省烟台市开发区南昌大街48号
