Elastomeric Modified Bitumen SBS Waterproofing Membrane 3mm 4mm For Flat Roof
Sbs Elastomeric Modified Bitumen Waterproof Membrane For Flat Roof
Product Description
SBS Torch Applied Modified Bitumen Waterproofing Membrane is composed of SBS (styrene - butadiene - styrene) thermoplastic elastomer modified asphalt as dip coating material, with high quality polyester tire or glass fiber compound tire cloth as the base, covered with polyethylene (PE Type), fine sand (S Type), mineral aggregate (M Type) as the facing material, applied with torch on waterproofing application.
| No. | Item | Index | ||
| Type I | Type II | |||
| 1 | Soluble matter content /(g/m²) | 3 mm | ≥2100 | ≥2100 |
| 4 mm | ≥2900 | ≥2900 | ||
| 2 | Heat resistance | Test temperature /℃ | 90 | 105 |
| Slip /mm | ≤2 | ≤2 | ||
| Test phenomenon | No flowing, no dripping | No flowing, no dripping | ||
| 3 | Low‑temperature flexibility | No cracking at −20 ℃ | No cracking at −25 ℃ | |
| 4 | Water impermeability | 0.3 MPa, 120 min, no water penetration | 0.3 MPa, 120 min, no water penetration | |
| 5 | Tensile properties | Maximum tensile force /(N/50 mm) | ≥500 | ≥800 |
| Elongation at maximum tensile force | ≥30 % | ≥40 % | ||
| Test phenomenon | During tension test: no cracking of bitumen coating in specimen middle, no delamination from reinforcement substrate | During tension test: no cracking of bitumen coating in specimen middle, no delamination from reinforcement substrate | ||
Construction Methods
Base treatment: Clean the base surface, repair cracks and pits, and form arcs at internal and external corners. The base shall be flat, clean and as dry as possible.
Apply base primer (cold base oil): Apply evenly and allow to dry until non-tacky to touch.
Install reinforcement layers: Lay additional reinforcement layers at internal and external corners, pipe roots and drain outlets.
Snap lines for installation: Lay from low to high following water flow direction. Heat the underside of the membrane with a torch, lay immediately once asphalt melts, and roll with pressure roller to expel air.
Lap joint sealing: Long-side lap ≥100 mm, short-side lap ≥150 mm. Fully heat-fuse lap joints with uniform asphalt extrusion, press firmly for sealing.
Terminal treatment: Fix membrane terminals on parapet walls and vertical surfaces with pressure strips and seal tightly with sealant.
Acceptance: No hollowing or edge lifting. Conduct water-holding / water-spraying test on roof, and install protective layer upon passing inspection.
Scope of Application
It is applicable to waterproof and anti-seepage projects in basement, roof, and other parts of industrial and civil buildings.
Storage and Transport
1. Different types or specifications of products should be separated, not mixed.
2. Keep bitumen torch on membrane dry and ventilated, protected from the sun or rain.
3. Storage temperature should not be higher than 45 ℃. Pile up the membranes flatwise whose stockpile height should not exceed five layers.
4. Prevent tilt or side pressure during transportation, and cover with felt if necessary.
5. Storage time is at least one year from manufacture date if the product is under normal storage condition.
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