polycarbonate greenhouse 1,light transmisson, 2,fire retardancy 3,thermal insulation, 4, ... According to GB8624-1997 the fire retardant classification of POLYGAL project sun sheet is B1.4, Impactresistance Its outstanding toughnes offers ... board .4. Bank ATMS. Bullet resistabce material.5. Conservatories ,agriculturall greenhouse ,zoos ,botanical gradens.6. industrial roofing and glazing.7. Swimming ...