JY-SPU Single Componacent Polyurethane Waterproof Coating

JY-SPU is a reactive moisture-curing polymer waterproof coating. It is formulated with isocyanate and polyether as the primary raw materials, blended with various latent curing agents, plasticizers, and other additives, and produced through specialized processes such as high-temperature dehydration and polymerization. When applied to a waterproof substrate, the -NCO end groups in the polyurethane prepolymer react with moisture in the air, forming a tough, flexible, and seamless rubber waterproof membrane on the substrate surface. This product offers the advantages of on-site immediate use, easy application, excellent elasticity, and strong adhesion, making it an ideal choice for reliable waterproof protection.

Category: Waterproof Coating

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Description

Product Introduction

JY-SPU single-component polyurethane waterproof coating is a high-performance waterproof coating, primarily composed of isocyanate and polyether polyol, with the addition of special additives, fillers, and pigments. It is manufactured using advanced production equipment, ensuring excellent quality and performance. After being applied to a waterproof substrate, it reacts with moisture in the air to form a continuous, seamless, rubber-like waterproof coating on the surface. This coating exhibits extremely strong adhesion and long-lasting durability, providing reliable waterproof protection.

Main Product Information

Application Range	Details
Building waterproofing applications	1.6 kg/m² – 1.8 kg/m² (per mm thickness)
Color	Black / Red
Density	1.3–1.4 kg/L
Pot Life	4H
Physical State	Liqui
Packaging Specification	20 kg/bucke

Performance Characteristics

Single-component moisture-curing film formation: Chemically reacts with moisture in the air to form a flexible, rubber-like waterproof membrane.
Easy application: Ready-to-use, simple construction process. Largely unaffected by moisture content in the substrate; can be applied on relatively damp substrates or in environments with high relative humidity.
Dense coating: Free of pinholes and bubbles. Single-layer coating thickness can reach 1–3 mm.
Excellent mechanical and temperature resistance properties: High tensile strength, large elongation, good rubber elasticity and resilience. Outstanding resistance to both high and low temperatures, with strong adaptability to substrate contraction and deformation cracking.
Strong adhesion: No primer required on various qualified substrates.
Excellent resistance: Resistant to water erosion, chemical corrosion, and mold growth.
Environmentally friendly with good low-temperature flexibility: Contains no toxic solvents such as benzene, toluene, or xylene, and is free of coal tar components. Also exhibits excellent low-temperature bending performance.
Customizable colors: Adjustable colors available to meet customers’ individual requirements for surface color.

Main Technical Performance Indicators

Implemented Standard: GB/T 19250-2013

序列号	物品		技术指标（I型）	技术指标（II型）	技术指标（第三类）
1	固形物含量 % ≥		85
2	干燥时间	表面干燥时间 h ≤	12
2	干燥时间	实际干燥时间 h ≤	24
3	抗拉强度 MPa ≥		2.0	6.0	12.0
4	断裂伸长率 % ≥		500	450	150
5	水不渗透性 0.3MPa 30分钟		防水的
6	低温柔韧性 ℃ ≤		-35
7	粘合强度 MPa ≥		1.0
平整^房产			20分钟后未见明显牙印
a. 此性能不适用于单组分和喷涂产品。

应用范围

JY-SPU Single Component Polyurethane Waterproof Coating is widely applicable to waterproofing construction of various civil and industrial buildings, with outstanding adaptability to both common and complex structural scenarios. Its specific application scope is detailed as follows:

1. Roofing Waterproofing

As a high-performance polyurethane waterproof coating for roof, it is perfectly suitable for waterproofing projects of building roofs (including flat roofs and pitched roofs) in civil residences, commercial buildings, and industrial workshops. It forms a tough, seamless rubber film that resists rain, snow, and temperature fluctuations, providing long-lasting waterproof protection for roof structures.

2. Underground Space Waterproofing

It is highly recommended for waterproofing of basements in civil and industrial buildings. As a reliable polyurethane waterproof coating for concrete, it adheres firmly to concrete substrates (the most common base material for basements) and effectively blocks water seepage from surrounding soil and groundwater. This ensures the dryness of underground spaces (such as residential basements, underground garages, and industrial underground workshops) and maintains structural integrity.

3. Indoor Wet Area Waterproofing

This product excels in waterproofing construction of indoor wet areas like bathrooms and toilets in civil buildings. Its dense, pinhole-free coating can prevent water penetration into walls and floors, avoiding mold growth, decoration damage, and structural deterioration caused by moisture accumulation.

4. Water-Containing Facility Waterproofing

It is widely used for waterproofing of swimming pools in residential communities, hotels, gyms, and other public or private venues. The waterproof film formed by this polyurethane waterproof coating has strong water resistance and durability, withstanding long-term immersion in water without losing its waterproof performance—fully meeting the strict requirements of water-containing facilities.

5. Waterproofing of Complex Structural Parts

It is particularly suitable for waterproofing projects in parts with complex shapes and crisscrossing pipes (such as pipe penetrations in walls/roofs, irregular structural joints, and equipment foundations with multiple pipelines) in both civil and industrial buildings. Thanks to its good fluidity and adhesion, it can fully cover these uneven or intricate areas, forming a continuous, gap-free waterproof layer that effectively solves waterproofing challenges in hard-to-reach or complex structural parts.

Construction Process

This streamlined process retains key operational requirements while ensuring clarity and practicality.

1. Pre-Construction Prep

Materials & Tools

Stir the JY-SPU coating (within shelf life) evenly for 3–5 minutes; no dilution needed. Reference Dosage: 1.3–1.5 kg/m² for 1mm dry film.

Prepare tools: Rubber/plastic scrapers (large areas), brushes (corners/pipes), thickness gauge, and safety gear.

Environmental requirement: Construct at 5–35℃; avoid rain/wind (＞5 m/s); base moisture ≤15%.

2. Base Layer Preparation

Ensure the base (concrete/mortar) is solid, flat, and debris-free. Wipe oil with ethanol; patch cracks (＞0.3mm with mortar).

Corner Treatment: Internal corners (radius ＞50mm) and external corners (radius ＞10mm) must be arc-shaped to prevent cracking.

For pipes/joints: First apply a 0.5mm "reinforcement coat" with a brush.

3. Coating Application

Large-Area Construction

Use scrapers for even coating; total thickness 1.5–2.0mm via 3–4 perpendicular coats (apply next only after previous cure).

Underground floors: Embed a reinforcing membrane between coats.

Scene-Specific Thickness

Scene	Thickness Requirement
Underground Engineering	1.2–2.0mm (typically 1.5mm)
Bathrooms/Toilets	≥1.5mm
Exposed Roofs (Multi-coat)	Each coat ≥1.2mm
Exposed Roofs (Single-coat, Class Ⅲ)	≥2mm
Roofs with Membrane	≥1.0mm (under); ≥0.5mm (above)

4. Finishing & Curing

After the final coat (pre-cure), sprinkle clean sand grains to boost decor layer adhesion.

Cure fully for 24–48 hours (20–25℃, 50–70% humidity); avoid contact during curing.

5. Inspection & Protection

Quality Check

Visual: No pinholes/bubbles; Thickness: Meet scene standards; Adhesion: No peeling (grid test); Waterproof: 24h immersion (no seepage).

Post-Construction

Add an isolation protective layer (per design) to avoid UV/mechanical damage. Repairs need 50mm overlap with original film.

About Geart Ocean Waterproof

Great Ocean Technology Co., Ltd. (formerly Weifang Juyang New Waterproof Materials Co., Ltd.) is located in Taitou Town, Shouguang City—the largest waterproof material base in China. Founded in 1999, we are a high-tech professional waterproof enterprise integrating scientific research, production, and sales in the waterproof industry.

我厂占地26000平方米。经过多年的发展和创新，我们在中国拥有多条先进的卷材、片材和涂料生产线。我们的主要产品涵盖数十个类别，例如聚乙烯聚丙烯（聚酯）聚合物防水卷材、PVC防水卷材、TPO防水卷材、高速铁路用CPE防水卷材、聚合物自粘防水卷材、非沥青基反应型预铺聚合物自粘膜防水卷材、排水防护板、改性沥青防水卷材、防根穿刺防水卷材、单组分聚氨酯防水涂料、双组分聚氨酯防水涂料、JS复合防水涂料、水泥基毛细结晶防水涂料、喷涂式快干橡胶沥青防水涂料等等。

资格认证

我们拥有雄厚的技术实力，配备专业的技师团队、先进的设备和全面的检测仪器，确保产品质量稳定可靠。我们的产品已通过国家权威检测机构的认证。我们荣获中国农业部颁发的“符合综合质量管理体系”称号，并获得质量保证体系认证。此外，我们还获得了中国质量检验协会颁发的“国家认可检测合格产品”证书、“山东省工业建筑产品注册证书”和“工业产品生产许可证”等多项认证。值得一提的是，我们提供防水产品的定制尺寸服务，以满足不同建筑项目的特定需求。如有任何定制需求或业务咨询，欢迎随时与我们联系。