Product Overview
High-solids elastomeric moisture-curing membranes engineered for below-grade structures, civil infrastructure, and podium decks. These systems cure into a seamless, monolithic barrier that bonds directly to concrete substrates, accommodating structural micro-movement and continuous hydrostatic pressure. Available in single-component polyurethane and two-component polymer-modified cementitious variants.
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Key Features
Elastomeric Recovery: Accommodates dynamic thermal movement and structural joint shifts without tearing.
Monolithic Application: Cures to a continuous, jointless field layer, removing weak points inherent in pre-formed sheet membranes.
Hydrostatic Pressure Tolerance: Withstands positive and negative water pressure up to 0.5 MPa.
Chemical Durability: Resists ground sulfates, mild acids, and soil alkaline elements.
Moisture Vapor Balance: Blocks liquid water ingress while allowing trapped substrate vapor to vent, preventing blister formation.
Technical Specifications
|
Property |
PU System (Type A) |
Polymer-Cement (Type B) |
Test Standard |
|
Binder Chemistry |
Moisture-curing Polyurethane |
Acrylic Copolymer + Portland Cement |
- |
|
Tensile Strength |
>= 2.5 MPa |
>= 1.8 MPa |
ASTM D412 / EN 12311-2 |
|
Elongation at Break |
>= 600% |
>= 150% |
ASTM D412 |
|
Crack Bridging |
Up to 2.0 mm |
Up to 1.2 mm |
EN 1062-7 |
|
Adhesion to Concrete |
>= 1.5 MPa (Concrete failure) |
>= 1.2 MPa |
ASTM D4541 / EN 1542 |
|
Hydrostatic Resistance |
Pass (0.3 MPa, 30 min) |
Pass (0.3 MPa, 30 min) |
EN 12390-8 |
|
Volume Solids |
>= 92% |
N/A (Liquid-Powder Mix) |
ASTM D2697 |
|
Shore A Hardness |
65 +/- 5 |
- |
ASTM D2240 |
Application Areas
Below-Grade Foundations:
Retaining walls, basement slabs, foundation walls, and lift pits.
Civil Engineering:
Tunnel linings, box culverts, bridge decks, and subway stations.
Podium Decks & Plazas:
Roof slabs and parking structures prior to overburden or landscaping.
Water Containment:
Sewage treatment tanks and industrial secondary containment bunds.
Suitable Substrates
Concrete:
Cast-in-place concrete, precast panels, and structural screeds (minimum compressive strength 25 MPa, moisture content < 4%).
01
Masonry:
Fully grouted concrete block and brickwork finished with a sound leveling render.
02
Metal:
Primed structural steel plates and pipe penetrations.
03
Exclusions:
Unprimed timber, lightweight gypsum boards, and substrates contaminated with curing compounds, oil, or dust.
04
Application Workflow
Substrate Prep -> Epoxy Priming -> Detail Detailing -> Base & Top Coats -> Protection Layer
Substrate Preparation: Shot-blast or scarify concrete to remove laitance, achieving a surface profile of CSP 3 to CSP 5. Repair honeycombs and cracks wider than 0.4 mm using structural epoxy mortar.
Priming: Apply solvent-free epoxy or polyurethane primer at 0.20 - 0.30 kg/m² using a roller to seal surface pores and stop pinhole outgassing. Tack-cure for 4 - 6 hours at 20°C.
Detailing: Embed reinforcing polyester fleece in a wet stripe coat at internal angles, pipe penetrations, and cold joints.
Membrane Installation: Apply the liquid coating in two cross-directional coats using a notched squeegee or airless spray equipment. Monitor wet film thickness to achieve a dry film thickness (DFT) of 1.5 - 2.0 mm.
Protection Placement: Install protection boards, drainage geocomposites, or screeds within 72 hours of final cure to prevent jobsite damage during backfill.
Packaging & Storage
Packaging Configurations:
PU Systems: 25 kg steel pails or 200 kg sealed drums.
Cementitious Polymer Systems: 25 kg multi-wall paper bags (powder) and 10 kg plastic jugs (liquid).
Shelf Life:
12 months from manufacturing date in unopened, original containers.
Storage Environment:
Store indoors in dry conditions between 5°C and 30°C. Keep away from direct sunlight, open flames, and high-humidity areas.
Manufacturing & Quality Control
Production Equipment:
Automated high-speed dissolvers and vacuum-sealed mixing reactors ensuring batch homogeneity and zero air entrapment.
Factory Testing:
Every production batch undergoes internal testing for solid content, viscosity, ash content, and tensile elongation per ASTM D412 before release.
Traceability:
Containers feature laser-etched batch numbers linked directly to raw material lot certificates and factory mixing records.
Quality Framework:
ISO 9001, ISO 14001, and CE compliance standards maintained across manufacturing lines.
OEM & ODM / Customization
In addition to the regular products that we already produce.
Formulation Adjustments:
Viscosity, thixotropic index, and cure rates can be modified for vertical wall applications or manual/spray placement methods.
Private Labeling:
Custom printed pails, multilingual container labeling (English, Spanish, French, Arabic), and co-branded technical data sheets (TDS).
Logistics Optimization:
Pallet configurations engineered for standard 20-foot containerized sea freight to reduce transit footprint.
fAQ
Q: Can this product be installed on damp concrete?
A: Solvent-free polyurethane requires substrate moisture below 4%. For green or damp concrete (> 4% moisture), use our moisture-tolerant two-component cementitious polymer or apply a dedicated vapor-mitigating epoxy primer first.
Q: What is the allowable recoat window between coats?
A: The recoat window ranges between 12 and 24 hours at 20°C. If left longer than 48 hours, solvent wiping and mechanical light abrading are required to ensure interlaminar bond strength.
Q: Is the material UV stable for exposed roof surfaces?
A: Standard aromatic polyurethane formulations require an aliphatic UV-resistant topcoat if exposed to sunlight. For exposed pedestrian decks, specify our aliphatic topcoat option.
Q: What is the minimum order quantity (MOQ) for private labeling?
A: The MOQ for custom packaging and branded labels is 5 metric tons or one standard 20-foot container load (20GP).
As one of the most professional polymer waterproofing systems manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale bulk customized polymer waterproofing systems from our factory. Contact us for more details.
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