Elastomer body(SBS)modified asphalt waterproof membrane

一、Product Introduction

1. Key Features

• Modifier: Styrene-Butadiene-Styrene (SBS) rubber modified bitumen
• Reinforcement: Polyester felt (PY) / Fiberglass mat (G) for high tensile strength
• Performance advantage：

• Low-temperature flexibility: Crack-resistant at -25℃ (GB 18242 compliant)
• High-temperature stability: No flow at 90℃
• Elongation: ≥30% for substrate movement accommodation

• Structure

• Top surface: Fine sand/Mineral granules/PE film (UV-resistant)
• Core: SBS modified bitumen + Polyester reinforcement
• Bottom surface: PE film/Release paper

‌3. Applications

• Roofs, basements, tunnels (Type I/II, 3-5mm thickness)
• Bridges, hydraulic structures (Reinforced type ≥5mm)

二、Construction Steps

First stage：Substrate Preparation

• Cleaning and leveling

• Remove dust/oil, repair cracks with polymer mortar
• Flatness: ≤5mm gap under 3m straightedge

• Dryness test ‌

• Moisture content: ≤9% (Plastic sheet test: no condensation in 24h)

• Node processing

• Radius ≥50mm at corners, pipe outlets shaped as "dome slopes"

second stage:Membrane Installation

‌Hot-melt: 1.Snap control line

2. Heat membrane underside & substrate with torch (30° angle, 300mm distance)

3. Roll forward when asphalt melts to glossy black

4. Reheat overlaps for 3mm asphalt bead sealing

‌Cold-adhesive:
  1. Apply adhesive (≥0.4kg/m² coverage)
  2. Rest membrane for 5min (solvent evaporation)
  3. Roll to eliminate air pockets

Critical Parameters:

• Overlap: 80-100mm (long side), 150mm (short side / perpendicular to ridge)
• Staggered seams: ≥1/3 width between adjacent joints