Best Water-Based Polyurethane Waterproof Coating Manufacturer

Q: How to find a reliable waterproof coating supplier and exporter for my project?

Evaluate suppliers on these five points: TDS & specifications — Should be available before you order, not after. Specialization — A focused waterproofing supplier has better formulation expertise than a general chemical trader. Samples — Test on your actual substrate before committing to bulk. OEM capability — Custom color, packaging, and labeling if you're building your own brand. Export compliance — MSDS, DG classification, and customs documentation for smooth international shipping. At BOSLAI, we provide downloadable TDS and product specifications, support sample shipping and OEM customization, and have export experience across global markets—so you can verify quality firsthand through samples.

BOSLAI Water-Based Polyurethane Waterproof Coating (PU waterproof coating) is an eco-friendly, high-molecular elastic waterproof material, which is non-toxic and odorless. It offers excellent adhesion and breathability. It has strong adhesion to mortar, cement substrates, stone, and metal products, with stable chemical properties. It can withstand long-term sunlight exposure, providing UV protection, and features high strength, large elongation, and good elasticity.

Single-component / Eco Friendly / OEM Accepted / UV Resistant / Brush or Sprayer Applied

Grey Water-Based Polyurethane Waterproof Coating Factory and Exporter

Water-based PU Coating Boslai water-based polyurethane waterproof coating bucket, China waterproof coating manufacturer and factory

Where Can BOSLAI Water-Based Polyurethane Waterproof Coating Be Applied?

1.Building Surfaces: Roofs and terraces, Interior and exterior walls, Balconies.

2.Indoor Spaces: Bathrooms, Warehouses, Kitchens.

3.Special Structures: Basements, Pools, Water tanks.

4.Infrastructure: Tunnels, Bridges, Reservoirs.

What Are the Packaging Options, Coverage Rates, and Warranty?

Specification:	18kg/pail or 50kg/pail
Appearance:	Single component, viscous emulsion, color can be customized.
Coverage:	It is recommended to apply two coats, with each pail covering 13~15m².
Warranty period:	More than 10 years.
Shelf Life:	1 Year

What Are the Technical Specifications?

Item	Data
Tensile Strength, MPa ≥	6.74
Elongation at Break, % ≥	352
Low-Temp Flexibility	-35°C, no cracks
Water Resistance (0.3 MPa 0.5a)	0.3 MPa, 120 minutes, Impermeable
Surface Drying, h	8
Thorough Drying, h	23
Bonding Strength, MPa	1.2
Water Absorption Rate, %	4.3

TDS_Water-Based Polyurethane Waterproof Coating.pdf

TDS_Water-Based Polyurethane Waterproof Coating Download

What are the key features and advantages of BOSLAI water-based polyurethane waterproof coating?

BOSLAI water-based polyurethane waterproof coating offers 5 core advantages that make it versatile for both indoor and outdoor applications:

UV resistance: It can withstand long-term exposure to sunlight, making it suitable for use in any outdoor environment without degradation or peeling.
Weather resistance: Resistant to oxidation and moisture erosion, maintaining waterproofing effectiveness over the long term even in harsh climates.
High elasticity: The coating film has a certain degree of elasticity (elongation at break ≥352%), adapting to minor substrate deformations and resisting cracking.
Excellent waterproof ability: Effectively prevents water penetration, providing reliable waterproofing with impermeability tested at 0.3 MPa for 120 minutes.
Customizable colors: BOSLAI supports OEM polyurethane waterproof coating of any color, such as blue, gray, red, etc., to match project aesthetics or brand requirements.

Customization Service

Customization is available for product color, packaging design, and package sizes.

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Contact us

Address

Building 12, Yun Chao Fu, Hangzhou City, Zhejiang Province, China.

Phone (Whatsapp/wechat)

+86 15231151892
+86 15906641341

info@boslaiwaterproof.com

FAQ

Can water-based polyurethane waterproof coating be applied on wet or damp surfaces?

Yes. BOSLAI water-based polyurethane waterproof coating can be applied on damp cement substrates without needing to wait for full surface dryness. This significantly reduces construction time, especially in humid climates or basement environments where drying is difficult.

Is water-based polyurethane waterproof coating safe for indoor applications?

Yes. BOSLAI water-based polyurethane coating is non-toxic, odorless, and eco-friendly. It contains no volatile organic compounds (VOCs) that pose health risks, making it suitable for bathrooms, kitchens, and other enclosed indoor spaces. Workers can apply it without respiratory protection.

Can this coating be used for swimming pools and water tanks?

Yes, with proper finishing. BOSLAI water-based polyurethane coating is impermeable at 0.3 MPa for 120 minutes and can withstand submerged conditions up to 20 days. For permanent submersion applications such as swimming pools and water tanks, a concrete topping or tile layer must be applied over the coating film.

How many coats are required, and what is the recommended coverage?

Two coats are recommended for standard waterproofing applications. Each 18kg pail covers approximately 13–15 m² per coat. For high-stress areas (basements, tunnels, long-term water exposure), three coats may be required. Allow 4 hours for surface drying and 8 hours for thorough drying between coats.

What surfaces does BOSLAI water-based polyurethane coating adhere to?

BOSLAI water-based polyurethane coating bonds strongly to concrete, mortar, cement substrates, metal, tiles, glass, wood, and existing coating layers. Its bonding strength reaches ≥1.2 MPa. No primer is required on most standard cement surfaces.

How to find a reliable waterproof coating supplier and exporter for my project?

Evaluate suppliers on these five points:
TDS & specifications — Should be available before you order, not after.
Specialization — A focused waterproofing supplier has better formulation expertise than a general chemical trader.
Samples — Test on your actual substrate before committing to bulk.
OEM capability — Custom color, packaging, and labeling if you’re building your own brand.
Export compliance — MSDS, DG classification, and customs documentation for smooth international shipping.
At BOSLAI, we provide downloadable TDS and product specifications, support sample shipping and OEM customization, and have export experience across global markets—so you can verify quality firsthand through samples.

What are the application methods and special usage tips for this coating?

BOSLAI water-based polyurethane coating is designed for flexible application:
1.Can be applied by sprayer, roller, brush, or scraper
2.Can be diluted with water for easier application on large surface areas
3.Compatible with fiber mesh for reinforced waterproofing on high-stress zones
4.Can adhere directly to concrete, metal, tiles, glass, wood, and existing coatings without primer
5.UV resistant—suitable for outdoor exposure without additional protective layer

What is the difference between water-based and solvent-based polyurethane waterproof coating?

Water-based: VOC-free, safe for indoor use, lower odor, slower dry time. Solvent-based: faster dry, stronger odor, higher VOCs, more suitable for industrial settings.

Why Importers Choose BOSLAI

As a dedicated water-based polyurethane waterproof coating manufacturer in China, BOSLAI supplies distributors and contractors across 40+ countries. Our water-based polyurethane formulation is produced in a 10,000-ton facility with strict batch-to-batch consistency. OEM clients receive private-label packaging, custom formulation adjustments, and full export documentation including TDS, MSDS, and COA. Whether you need a reliable water-based polyurethane waterproof coating supplier for ongoing distribution or a factory partner for branded product lines, BOSLAI delivers quality at competitive FOB pricing.