New Product Focus | TPR EVA High Molecular Self-Adhering Waterproof Membrane Specification and Installation

Publish Date: 2024-04-13 0Views

Combines the advantages of both EVA and polyester-based high molecular waterproof membranes, featuring high tensile strength and excellent elasticity. It significantly overcomes issues such as bubbling and poor adhesion caused by the hardness of HDPE membranes, making it ideal for industrial and civil building roofs, underground structures, and municipal infrastructure waterproofing projects.

Looking for an eco-friendly, green EVA-type waterproof membrane?

Today, it’s here!

JX180 TPR EVAHigh Molecular Self-Adhering Waterproof Membrane

is based onEVA resinas the base raw material, enhanced with wood fiber fillers and other functional additives, with a single-sided layer of EVA base film and pressure-sensitive adhesive layer, combined with advanced co-polymerization technology to form an improved waterproof membrane. It integrates the superior properties of both EVA and polyester-based high molecular membranes, offering high tensile strength and exceptional elasticity. It effectively addresses common problems like blistering and poor adhesion associated with HDPE membranes due to their rigidity, and is suitable fornon-exposed outdoor applications including industrial and residential roof waterproofing, underground structure waterproofing, and municipal infrastructure projects.It features thickness options of1.2mm / 1.5mm / 1.6mm and other special specifications, with widths of 1m and 2m available upon request.TPR high molecular EVA self-adhering waterproof membrane combines the best characteristics of EVA and polyester materials, delivering unique product advantages.

The membrane exhibits high elasticity and excellent recovery, with a soft, pliable texture that adheres well to substrates, making it highly suitable for complex underground construction environments.Self-adhering membrane usesEVA base film

, strong bonding performance, built-in waterproof effect, and outstanding resistance to aging, water penetration, and environmental degradation. Suitable for various construction environments without risk of delamination.

High strength and excellent resistance to hydrostatic pressure, along with superior durability against abrasion, impact, puncture, aging, and chemical corrosion.
Long edges pre-cut for lapping, using self-adhering technology—no need for hot air welding. Easy installation, time-saving, and quality assured.Cold application, no open flame, no toxic fumes or odors, zero environmental pollution, and safe for health and ecological protection.TPR high molecular EVA self-adhering waterproof membrane is mainly applied via two methods:
Wet-laying method
【Installation Process】
Surface preparation → Apply primer to substrate (optional if substrate is already primed) → Special area treatment → Determine membrane alignment line → Spread waterproof mortar → Lay membrane – roll, vent air → Lapped edge sealing → Head joint sealing → Self-inspection and acceptance → Handover of work surface

【Installation Guidelines】1. Surface Preparation: Remove debris, dust, and foreign matter from the substrate. Ensure the surface is clean, dry, and free of moisture. Pre-wet the surface if necessary.2. Adhesive Mixture Preparation: Mix water-to-cement ratio at 100:(40–45):0.5 (water:cement:EVA powder). First, add EVA powder into a mixing container, then slowly add water while stirring. Finally, add water-based mortar and stir until homogeneous—no lumps, no sediment, no bubbles. Ready for use.3. Determine Coating Thickness Based on Substrate Flatness: Typically 2–3 mm (adjust according to substrate condition). Apply the mortar evenly within the membrane laying area—avoid excessive spreading or edge overflow.4. Peel off the protective release film from the membrane's underside, lay the membrane flat on the freshly coated mortar. After completing the first layer, apply another coat of mortar, then lay the second layer. Continue in sequence. Overlap adjacent membranes flush and parallel.

5. Use a wooden trowel or EVA board to press and roll the membrane surface, removing trapped air and ensuring tight adhesion between membrane and mortar.

6. Curing & Protection: Allow curing for 24 to 48 hours (depending on ambient temperature). Higher temperatures reduce required curing time.

7. When installing vertical wall membranes, temporarily seal the membrane end (using EVA tape or mortar sealant) to prevent premature water leakage during curing.

8. Lap width must be no less than 80 mm. Use full-surface lapping with no gaps.

Dry-laying method

【Installation Process】

Surface preparation → Apply 'self-adhering composite' high-strength adhesive → Special area treatment → Determine membrane alignment line → Lay waterproof membrane → Lapped edge treatment → Joint sealing → Self-inspection and acceptance → Handover of work surface

【Installation Guidelines】

1. Surface Cleaning: Thoroughly sweep and clean the substrate. The surface must be level, clean, and dry.

2. Apply Primer: Use a long-handled trowel to spread the primer evenly over the prepared surface (or brush), ensuring uniform coverage without leaks or pooling.

3. Additional Waterproof Layer Application: Prior to laying the main membrane, apply an additional waterproof layer at critical joints and details per design and specification requirements. Use same-material self-adhering membrane for consistency.

4. Layout Line Marking: On the dry, clean substrate, mark the lap lines according to the selected membrane width. Accurate marking ensures precise alignment during installation.

5. Large Area Installation: Peel off the release film from the membrane’s underside, lay the membrane onto the dry substrate. Lightly roll the surface to expel air and ensure tight adhesion. Multiple workers can coordinate the process. Adjacent membranes are connected using lapping technique, with consistent lap width of 80 mm on both long and short sides.

6. Clean and prepare the lapping edge: Remove any release film residue from the edge of the lower membrane. Wipe clean and dry before applying the lapping treatment. If needed, apply sealing compound to reinforce the bond. Ensure a tight, sealed joint.Jin Xin TPR

Series

Membranes,

In addition to the self-adhering type described above,

there are alsopre-laid typeand

root-resistant EVA self-adhering type

Pre-laid type is suitable for underground basement slabs, interior side walls of external waterproofing, railway tunnels, nuclear power plants, urban utility corridors, open-cut trenches, and concealed tunnels. Root-resistant EVA self-adhering membranes are typically used for rooftop slabs, flat roofs, green rooftops, and other projects requiring plant root resistance.

Choose the appropriate TPR membrane type based on your specific project requirements.

金兴TPR系列卷材，除了本篇介绍的自粘类，还有预铺类和耐根穿刺丁基自粘类。预铺类适用于工民建地下室底板、外防内贴侧墙防水，地铁、核电、城市综合管廊、明挖隧道、暗挖隧道等地下工程防水。而耐根穿刺丁基自粘卷材类则一般适用于工民建有种植要求的车库顶板、平屋面、坡屋面及其它有种植需求的工程。大家可根据现实具体的工程需求，选择合适的TPR卷材类型。

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New Product Focus | TPR EVA High Molecular Self-Adhering Waterproof Membrane Specification and Installation

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