... rating is class B1. 6) Sound and heat insulation: Superb sound insulation for freeway barrier and super thermal insulation ... request) 3. Applications: 1) Roofing light sheet and sunshade for office building, department store, hotel, stadium, school, amusement ... center, hospital, etc. 2) Skylight, lighting for corridors, balcony, passages and subway entries, walkways. 3) Do- ...