Whatsapp: +8615901747869 Email: aaron.zhang@upassfilm.com web: www.upassfilm.com It is specially designed for waterproofing industry, which shall substitute conventional exposed waterproofing material including the film for waterproofing membrane. It also has cost effectiveness , and lasts over 25years of weather resistance. It is used as surface material of waterproofing membrane, butyl tapes and packaging ect.