Product Features

• How to use a roundel
• Construction and operation of non-woven fabric and sheet, respectively, complicated
• Damage to sheet and non-woven fabric due to high heat during fusion of roundel and waterproof sheet
• The sheet is opaque, so precise construction and construction status cannot be checked when heat-fusing the waterproof sheet on the roundel
• Excessive material consumption (thickness t=2.0>t:1.2m/m)