1 Roll - 16 feet x 8mm Foam Core Round Roll Butyl Tape. Soft Seal Excellent metal to glass adhesion waterproof sealant Dum-Dum Tape. Sticky all sides good for securing a multitude of applications. This product is to be used on side window tempered bolt in parts / bolt in back glass / Sunroofs frames. Great for older car models, side fixed window applications only. **This product is not to be used for windshield replacements or on any application where urethane adhesive is required.** Even if Butyl Tape was originally used on the windshield in the past it is no longer an acceptable product for that application and urethane must be used. Knowledge of the use of this product is helpful. Got a question? We can help. We have been in the Auto Glass Business since 1975. Other sizes available both in thickness and length see our store. Do not apply to wet surface. Surface must be clean and free from dirt old adhesives or chemicals.