JY-DPU Double Components Polyurethane Waterproof Coating

JY-DPU Two-Component Polyurethane Waterproof Coating

JY-DPU is a two-component polyurethane waterproof coating supplied as components A and B. After mixing at the specified ratio, it cures into a flexible, seamless membrane on a prepared substrate. Contact Great Ocean Waterproof for product selection, mixing guidance and quotations.

The coating consumption is approximately 1.5 kg/m² – 1.7 kg/m² per millimeter of dry film thickness.

Category: Waterproof Coating

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Description

Product Introduction

Compare this two-component system with our single-component polyurethane coating (JY-SPU), or explore the full polyurethane waterproof coating range for product selection and quotations.

JY-DPU Double Components Polyurethane Waterproof Coating is a high-performance, reactive curing waterproofing solution engineered for durable and seamless water protection across diverse surfaces. As a two-component system, it combines the precision of chemical reactivity with the reliability of rubber-like elasticity to deliver long-lasting waterproofing results.

Component A consists of an isocyanate-terminated prepolymer, synthesized through the polycondensation of polyether and isocyanate—laying the foundation for strong adhesion and structural integrity. Component B, a specialized colored liquid, is formulated with a balanced blend of plasticizers, curing agents, thickeners, accelerators, and fillers, designed to enhance flexibility, curing efficiency, and application ease.

When applied, the process is straightforward: simply mix Components A and B in the specified ratio, stir thoroughly to ensure uniformity, then apply the mixture to a prepared waterproof base layer. Through room-temperature cross-linking, the coating cures into a continuous, flexible, and seamless rubber-like elastic film. This film tightly bonds to the substrate, creating an impenetrable barrier that resists water penetration, even under dynamic conditions.

Practical and efficient, JY-DPU offers consistent coverage with a consumption rate of approximately 1.5 kg/m² to 1.7 kg/m² per millimeter of dry film thickness—making it suitable for both small-scale repairs and large-area waterproofing projects. Whether for roofs, basements, balconies, or other critical areas, JY-DPU Double Components Polyurethane Waterproof Coating stands as a trusted choice for robust, long-term water protection.

Key Product Information

Parameter	Details
Construction Usage	1.6 kg/m² - 1.8 kg/m² (per 1mm thickness)
Color	Black / Red
Density	1.3-1.4 kg/L
Opening Hours	4H
Physical State	Liquid
Specifications	20 kg/barrel

Performance Characteristics

JY-DPU Double Components Polyurethane Waterproof Coating stands out as a premium choice in polyurethane waterproofing solutions, boasting a range of performance characteristics that make it ideal for diverse waterproofing needs.

Superior Physical and Mechanical Properties: Crafted from pure polyurethane, this Polyurethane Waterproof Coating delivers exceptional rubber elasticity and resilience, paired with high tensile strength. Its robust structure enables strong resistance to substrate deformation—including shrinkage and cracking—ensuring long-term integrity in dynamic environments.
Exceptional Bonding Performance and Adhesion: Designed for versatility, this double components polyurethane waterproof coating forms strong bonds with various substrates. It can be directly applied to qualified surfaces, achieving a bonding strength of over 1.0MPa, making it a reliable polyurethane-based waterproofing solution for multi-substrate projects.
Excellent Construction Efficiency: As a user-friendly two-component system, this Polyurethane Waterproof Coating simplifies application: mix the two components in the specified ratio, and it’s ready for use. Achieving a 2mm thickness in just 2-3 layers, it forms a dense, pinhole-free, and bubble-free film, streamlining waterproofing workflows.
Outstanding Water and Corrosion Resistance: Through chemical reaction curing, this polyurethane waterproof coating creates a seamless, impenetrable film. It offers superior water resistance, corrosion resistance, and mold resistance, making it particularly suitable for long-term immersion areas—solidifying its role as a top-tier polyurethane waterproofing coating for wet environments.
Excellent Low-Temperature Flexibility: Engineered to perform in extreme conditions, this double components polyurethane waterproof coating maintains flexibility even at -35°C, bending without cracking. This makes it an ideal choice for low-temperature waterproofing projects, ensuring reliable protection year-round.

Key Performance Specification

Index	JY-DPU Specification
Tensile Strength	＞2MPa
Bonding Strength	≥1.2MPa
Low-Temperature Flexibility	-35℃ (no cracking)
Consumption (1mm Thickness)	1.5-1.7kg/㎡

Certified by ISO 9001 and compliant with environmental standards (VOC ≤50g/L), JY-DPU is a trusted 2K polyurethane waterproofing solution for diverse projects.

Main Technical Performance Indicators

Implementation Standard GB/T19250-2013

Serial No.	Item		Technical Indicator
Serial No.	Item		Type I	Type II	Type III
1	Solid Content % ≥		92
2	Drying Time	Surface Drying Time h ≤	12
2	Drying Time	Actual Drying Time h ≤	24
3	Tensile Strength Mpa ≥		2.0	6.0	12.0
4	Elongation at Break % ≥		500	450	150
5	Water Impermeability 0.3Mpa 30Min		Waterproof
6	Low-Temperature Flexibility ℃ ≤		-35
7	Adhesion Strength Mpa ≥		1.0
Levelling Property^a			No obvious tooth marks at 20min
a. This performance is not applicable to single-component and spray-applied products

Construction Process

1. Substrate Preparation for Polyurethane Waterproof Coating

The base must be solid, flat, and debris-free. Shape internal and external corners into arcs: internal corners with a radius ≥50mm, external corners with a radius ≥10mm. This foundational step ensures uniform adhesion and durability for the double components polyurethane waterproof coating.

2. Batching & Dosage of Polyurethane Waterproof Coating

Mix Component A and B in the specified ratio, stirring thoroughly before use. The reference dosage for this polyurethane waterproof coating is 1.3-1.5 kg/m² per 1mm dry film thickness—allowing precise material planning for projects of any scale.

3. Large-Area Application of Double Components Polyurethane Waterproof Coating

Use a rubber or plastic scraper to apply the mixed polyurethane waterproof coating evenly. Aim for a total thickness of 1.5mm-2.0mm, applied in 3-4 coats. Each subsequent coat should be applied perpendicular to the previous one, after the prior layer has fully cured. For underground floor waterproofing, add a reinforcing membrane between coats—an essential step for enhancing the integrity of this double components polyurethane waterproof coating in demanding environments.

4. Film Thickness Specifications for Polyurethane Waterproof Coating

Underground projects: 1.2-2.0mm (typically 1.5mm).
Toilet & bathroom areas: ≥1.5mm.
Exposed roof projects (multi-layer waterproofing): Each layer ≥1.2mm. For Grade III roof (single-layer waterproofing), thickness ≥2mm.
When using a reinforcing membrane: Under-membrane coating ≥1.0mm, over-membrane coating ≥0.5mm.

These standards ensure the polyurethane waterproof coating meets structural and environmental demands across diverse applications.

5. Topcoat Construction for Double Components Polyurethane Waterproof Coating

Before the final coat of this polyurethane waterproof coating cures, sprinkle clean sand evenly on the surface. This step improves adhesion with subsequent finish layers, optimizing the system’s longevity.

6. Protection Layer for Polyurethane Waterproof Coating

Apply an isolation protection layer to the cured polyurethane waterproof coating as per design specifications. This safeguards the membrane from physical damage and UV degradation, extending its service life.

Construction Process

Project Cases

Delhi Duwaka Waterproofing Project: Ocean Non Wovens, as a subsidiary of Great Ocean Waterproof, supplied and installed 18,000 square meters of 1.2 mm thick Ocean Nonwoven Geotextile (PET) for a large-scale waterproofing project in Delhi Duwaka. The project required a waterproofing solution that could prevent groundwater infiltration into underground structures, resist chemical erosion from soil and water contaminants, while ensuring high drainage efficiency and structural integrity. Ocean Nonwoven Geotextile perfectly met the project requirements due to its high permeability and drainage efficiency, excellent tensile strength and durability, chemical and UV resistance, and environmental sustainability.

Marine Industry Waterproofing Projects: Great Ocean Waterproof, as the official authorized agent of Hyundai Heavy Industries in China, specializes in the marketing and after-sales service of MAN and Wingd low-speed diesel engines and Hyundai Himsen medium-speed diesel engines. The company also holds official licenses from Hyundai Marine Solutions (HMS), Hyundai Electric Systems (HEES), and Hyundai Power Systems (HPS). Its clients include Jiangnan Shipyard, Shanghai Waigaoqiao Shipbuilding, and Yangzijiang Shipbuilding. For example, the company signed an agreement with Eltronic FuelTech to market and sell Eltronic FuelTech's supply and safety systems to designated shipyards in China, helping shipowners reduce their environmental footprint and improve efficiency and performance.

Railway Infrastructure Waterproofing Project: In Gadchiroli, Maharashtra, the company used 700 grams per square meter of Ocean geosynthetic composite material to reinforce railway infrastructure, ensuring the long-term stability and safety of the railway tracks by providing stable structural support and excellent waterproofing performance.

About Great Ocean Waterproof

Great Ocean Technology Co., Ltd. (formerly Weifang Juyang New Waterproof Materials Co., Ltd.), the manufacturer of JY-DPU Double Components Polyurethane Waterproof Coating, is headquartered in Taitou Town, Shouguang City—China’s largest waterproof material base. Established in 1999, we are a high-tech enterprise integrating scientific research, production, and sales, dedicated to delivering top-tier waterproof solutions.

Our 26,000-square-meter factory is equipped with advanced production lines for rolls, sheets, and coatings, enabling us to offer over dozens of product categories. These include polyethylene polypropylene waterproof rolls, PVC/TPO waterproof rolls, polymer self-adhesive membranes, and a full range of coatings—from single-component and two-component polyurethane waterproof coatings (like JY-DPU) to JS composite coatings and cement-based capillary crystalline coatings.

Backed by strong technical strength, professional technicians, and complete testing facilities, our products meet rigorous national standards. We hold certifications such as "National Authoritative Test Qualified Product", "Shandong Industrial Construction Product Record Certificate", and "Industrial Product Production License", and comply with ISO quality management systems.

We also provide custom size and specification services for waterproof products to accommodate diverse project needs. For inquiries about JY-DPU Double Components Polyurethane Waterproof Coating, customization requests, or business cooperation, please contact us directly—we are committed to being your trusted partner in waterproofing.