SEM DOOR SKIN AND SMC ADHESIVE. This DOOR SKIN & SMC ADHESIVE bonds metal door skins to door frames and SMC panels to SMC and metal. The non-sag formulation allows for easy use at any angle, and the epoxy technology provides excellent strength, corrosion protection and a long shelf life. 7 oz. DUAL-MIX cartridge. Color Black. Working time 25-30 minutes @ 70°F (21°C). Set time 1 hour @ 70°F (21°C). Cure time 24 hours @ 70°F (21°C). 39337