Waterproof sheet with a safe design that is sealed during sheet installation.

You can achieve temporary waterproofing with a protective seal (self-adhesive seal), so you can feel secure even in sudden rain! It guards against not only rainwater but also the intrusion of flames.

The OS-sheets are 1 meter wide and 7 meters long, with a 10 cm wide joint section on the long edge (side lap). Of that, 1 cm is a protective seal (self-adhesive seal section), and the remaining 9 cm is welded using a torch. During the sheet installation, it features a temporary waterproof function sealed by the 1 cm self-adhesive section, allowing the installation work and torch work to be performed separately, enabling the torch work on the side lap to be carried over to the next day. Even in the event of sudden rain, you can work with peace of mind thanks to the temporary waterproof function. Additionally, during the torch work at the sheet joint, the protective seal prevents flames from entering the sheet interior, allowing for safe installation without worrying about the substrate. *Please check the actual waterproof performance in the video on this site.

basic information

■ A hybrid modified asphalt waterproof sheet with two layers: a ventilation layer (under layer) and a waterproof layer (top layer) ■ A safe design that seals during sheet installation ■ Equipped with temporary waterproofing functionality ■ Protects against rainwater and flame intrusion into the sheet with a protective seal ■ Torch application only at the sheet joint to minimize the use of open flames *For more details, please refer to the PDF document or feel free to contact us.*