If you are wondering whether you can use JB Weld on your windshield, the answer is yes. The epoxy resin that is mixed with the catalyst is adhesive and goes on the entire surface of the windshield, so it bonds to the windshield and to itself. The chemical bonds to the windshield are permanent, so once the epoxy is cured, it is very difficult to remove it from the windshield without damaging it. This means that the chemical bonds are stronger than the bonds created by the adhesive used on the original windshield.