The Dongfang Yuhong PMB-741 SBS modified asphalt waterproofing membrane product sheet details specifications, performance, and installation guidelines.
The PMB-741 is an SBS‑modified asphalt waterproofing membrane with a polyester base fabric reinforcement and a PE film, sand and mineral particle surface isolation. It offers high tensile strength, good low‑temperature flexibility, and a water‑impermeability of 0.3 MPa.
The membrane is suitable for roof, underground, pool and fire‑water tank waterproofing. Installation can be performed by hot‑melt or hot‑adhesive methods, with a recommended 100 mm overlap and temperature limits of –20 °C to 90 °C. Storage temperature must not exceed 50 °C and the product is stored for up to one year under proper conditions. This manual is written in Chinese.
| Width | 1.0 m |
|---|---|
| Thickness | 3.0–5.0 mm |
| Length | 10 m or 7.5 m |
| Area per roll | 10 m² or 7.5 m² |
| Soluble content (4 mm) | ≥ 2900 g/m² |
| Heat resistance | 105 °C (no flow) |
| Low‑temperature flexibility | -25 °C (no cracks) |
| Water impermeability | 0.3 MPa for 30 min |
| Tensile strength | ≥ 800 N/50 mm |
| Bottom asphalt coating thickness | ≥ 1.0 mm |
The membrane overlap should be 100 mm.
Installation temperatures should be between –20 °C and 90 °C.
The product should be stored at temperatures not exceeding 50 °C.
The membrane provides a tensile strength of at least 800 N per 50 mm width.