What Is Extreme Sealing Tape And What Is It Used For?

Written by Caleb Shaw.

Extreme sealing tapes are designed to span a joint to prevent water ingress. In this blog, I’ll primarily be focusing on the products designed for use on commercial vehicles, caravans, and roof systems. If you have any questions regarding extreme sealing tape for any other use, please don’t hesitate to contact one of our specialists using the number above and we’ll do our best to help you.

Up until recently, the most common way to seal a truck/trailer roof was to apply a wet sealant around fasteners. However, this can often become a water ingress risk. A more recent method has been ‘flood sealing’ the roof which (when done well and with the right sealant) can be very robust and aesthetically pleasing.

Extreme sealing tapes were developed to speed up the process of creating a flood seal – where wet adhesive could take up to 30 minutes to mask up, the same job can be completed within a matter of minutes.

There are two types of extreme sealing tapes – rubber and acrylic based adhesive.
Rubber adhesive-based tapes has less moisture, chemical, UV and heat resistance, and are therefore only suited for internal applications or temporary patches.
Acrylic adhesive-based sealing tape offers a degree of repositionability when being applied due to the adhesion build up. It also offers extreme temperature resistance ranging between -40C to over 90C.

Tests show that both products perform well in climatic testing. Over 1000 hours show no degradation in adhesion. So, If you’re looking for applications within the bus/coach industry where joints are subjected to a large amount of expansion and/or contraction, extreme sealing tape may be the solution for you.