[screenman]

The first company to produce a repair system was Minnesota Mining and Manufacturing (3M) Company in St. Paul, Minnesota. The 3M Company first introduced a system they called "Scotch Weld" in 1971. This system employed ultra sound vibrations to clean the break and a syringe to inject a resin, or adhesive into the damage. The equipment successfully repaired "bullseye" type damage, but unfortunately was very large (filling the bed of a pick-up truck) and was very expensive to build and thus to lease to others. It is said that 3M did a good job of introducing the concept of windshield repair to insurance companies, but decided to pursue other products when the repair equipment failed to attain the volume that they required.

Why would you want to heat under pressure? I know that for a very short time the damage can open up but not long enough for any resin to penetrate very far. Since I changed to Magnibond I have not had to use heat to fill a star break once.