3M(TM) Scotch-Weld(TM) Epoxy Adhesive 2158 is a rigid, two-part epoxy adhesive. 1:1 mix ratio, 2 hour work life and handling strength in approximately 10 hours. This kit contains 1 gal. of part B and 1 gal. of part A 3M(TM) Scotch-Weld(TM) Epoxy Adhesive 2158 adhesive that cures at room temperature. Good adhesion to a variety of substrates including metals and plastics.