Exceptionally high strength provides a permanent repair to almost anything. Some of the most common repairs are metal, glass items, ceramics and jewelry. Resists impact, moisture, heat and vibration. J-B Weld MirrorWeld is a specially formulated adhesive specifically designed to bond rear view mirrors to windshields. It can be used to install new mirrors, as well as re-attach existing mirrors that have fallen off. Exceptionally high strength provides a permanent repair to almost anything. Some of the most common repairs are metal, glass items, ceramics and jewelry. Resists impact, moisture, heat and vibration.