Butyl tape

The surfaces to be sealed must be dry, capable of bearing load and free from grease and dust. The application temperature should not be below +5°C. Absorbent and porous surfaces should be pretreated with Würth butyl/bitumen primer. In order to obtain good initial adhesion to the substrate, the tape should be pressed against the substrate with a pressure roller and smoothed. Folds and wrinkles are to be avoided. Butyl has a "cold flow" tendency (flow characteristic of the tape). Therefore, the tape should always be fitted with a press-on profile to prevent the seal from slipping as a result of, for example, the weight of snow or backed-up water. Using excessive contact pressure on the profile will nevertheless cause the sealing compound to be "pushed out". Also, never compress the butyl tape to the zero point (use the supplied disc as a spacer)!