... underlayment is a synthetic roof-sheet which made from polyethelene, aluminum foil, nonwoven, etc PE-Plus A roof underlayment is a ... synthetic roof-sheet which made from polyethelene, aluminum foil, nonwoven, etc. Especially its PE bond layer features ageing ... special clothing, etc. Agriculture, packing, industry and other application Aluminum foil coated with pp nonwoven-PE plus A