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PU Waterproof Coating

Polyurethane (PU) Waterproof Coating

A single-component, reactive-cure polymeric waterproof coating that forms a flexible, seamless rubber-like waterproof membrane after application. High strength and high elongation adapt well to substrate cracking, suitable for water tanks, bridges and underground works.

Single-componentReactive cureHigh elongationSeamless

Key Technical Parameters

The following parameters are based on the official JIANBANG Coatings TDS (JB-B03 single-component polyurethane waterproof coating); solids, film thickness, coverage and drying time follow the full data sheet.

Color
Various colors
Gloss
High gloss
Density
Approx. 1.2 kg/L
Volume Solids
(60±2)%
Standard Film Thickness
1.5–2mm DFTapprox. 2.5–3.3mm WFT
Theoretical Coverage
1.8–2.4 kg/m²based on 1.5–2mm thickness
Full Cure
7 d
Flash Point
33℃

Key Features

Core advantages of the PU waterproof coating.

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Reactive Cure, Seamless

Forms an integral rubber-like waterproof membrane with no lap-seam weak points.

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High Strength, High Elongation

Adapts well to substrate cracking / expansion and contraction.

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Easy Application

Single-component, with clear advantages at complex details.

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Simple Repair

Local damage only requires local repair.

Typical Applications

Suitable for the following typical waterproofing and protection scenarios.

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Water tank / Basement

Waterproofing on positive / negative side.

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Bridge / Marine structures

Waterproofing and anti-seepage for concrete structures.

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Building exterior walls

Waterproofing and decoration of exterior walls.

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Ground / Underground works

Integral waterproof protection.

Recommended Coating System

Apply epoxy sealer primer on concrete substrate first, then the waterproof layer; match specifically to the working condition.

1
Substrate Preparation
Solid, dry substrate free of standing water and oil; fillets at internal/external corners.
2
PU Waterproof Layer
PU waterproof coating applied in multiple passes to design thickness, forming a seamless rubber membrane.
3
Surface Protection
For exposed areas, top with acrylic polyurethane topcoat for UV resistance as needed.
Note: Specific surface preparation grade, number of coats, DFT, recoat interval and drying time, etc., follow the official JIANBANG Coatings TDS; we will match a dedicated system one-to-one based on your substrate and working condition.

Related Solutions

The application area of this product and similar waterproofing products—click to jump directly.

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