3M™ Impact Resistant Adhesive, 07333, is a two-part epoxy adhesive which helps provide an extended work time, but can be rapidly cured with heat. The adhesive has excellent adhesion to a wide variety of properly prepared automotive substrates including steel and aluminum. It also has a feature indicating when the curing process has begun through colour change technology. The adhesive bead starts silver in colour and changes to purple once curing is underway. Cured product is purple to indicate proper mixing and complete cure.