Polytech™ ST-Presa waterproofing membrane
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Scope of application
Underground engineering floor and side walls constructed by the external defense and internal sticking method, mining tunnels, etc.
Product specifications
Model | Thickness(mm) | Wide(m) | Length(m) | Lap edges |
Class P (Plastic) |
1.2、1.5、1.7 | 1、2 | 20 | Unilateral self-adhesive Bilateral self-glue |
Product features
1. Mechanical properties: high material strength, high elongation, impact resistance, puncture resistance, scratch resistance;
2. Bonding performance: the polymer self-adhesive film layer has excellent bonding performance, and the pre-laying anti-adhesive method is used to form a full-adhesive waterproof structure with the main body of the post-casting structure, leaving no hidden danger of channeling water;
3. Aging resistance: excellent UV aging resistance, heat aging performance;
4. Marine environment erosion resistance: salinity resistance, chloride ion erosion resistance;
5. Durability: HDPE can maintain good chemical stability and service life in ordinary inorganic, organic acid, alkali, salt, organic solvent and microbial environment;
6. Environmental performance: green building materials, no pollution to the groundwater environment.
Technical indicators
Project | Indicators (P category) | |
Tensile properties | pulling force(/ N/50mm)≥ | 600 |
Tensile strength/MPa≥ | 16 | |
Membrane rupture elongation/%≥ | 400 | |
Phenomenon when stretching | There is no separation between the adhesive layer and the main material or tire base | |
heat tolerance | 80 °C, 2h no slip, flow, dripping | |
Low temperature bending | The main material and adhesive layer are -35 °C, no cracks | |
Low temperature flexibility | Adhesive layer -25 °C, no cracks | |
Oil permeability/number of sheets≤ | 1 | |
Impermeability 0.3MPa, 120min | Impermeable | |
Rate of dimensional change≤ | ±1.5 | |
With post-poured concrete Peel strength(/ N/mm) |
No processing≥ | 1.5 |
Water immersion treatment≥ | 1.0 | |
Sediment contaminates the surface≥ | 1.0 | |
UV treatment≥ | 1.0 | |
heat treatment≥ | 1.0 |
Construction steps
Base layer cleaning → Bullet line positioning → Large surface paving waterproofing membrane → Lap treatment → Detailed node treatment → Self-inspection, repair, acceptance → Lashing steel bars