... 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