Description

YHPUroof-8109 is a single-component, cold-applied, moisture-cured, aliphatic polyurethane roof waterproof coating. It is especially designed for durable roof waterproofing and is suitable for both new construction and refurbishment projects.

Specifications

**Packing and Specifications**
Item	Data
Appearance	Viscous Liquid
Viscosity/cp	7000±2000
Color	Grey
Density/kg/L	1.45-1.55
Solid Content by Weight	89-92 %
Pot life/h	3
Packing Size	20 kg per metal drum

**Properties**
Description	Test Methods	Typical Values
VOC	ASTM D2369	180 g/L
Tensile Strength	ASTM D412	3.7±0.5 MPa
Elongation at Break	ASTM D412	600±100%
Tear Strength	ASTM D624	22±4 N/mm
Pull-off Adhesion to Concrete	ASTM D7234	2.0±0.3 MPa
Shore A Hardness	ASTM D2240	60±4

Advantages

· Cold-applied and moisture-cured; no mixing, heating, or flame required.

· Maintains elasticity even at low temperatures.

· Good adhesion to most substrates, including tiles, metals, and concretes.

· Resistant to deicing salts, weak acids/alkalis, and molds.

· Aliphatic polymer, with excellent weather and UV resistance for long-term service.

Scope of Application

YHPUroof-8109 is especially designed as a durable exposed waterproofing membrane on flat or pitched roofs with rare pedestrian traffic. It is suitable for both new construction and refurbishment of old roofs.

FAQ

Q1: Can waterborne polyurethane be stored at temperatures below 0 degrees Celsius?

No. Waterborne coatings use water as a solvent. When stored below 0 degrees Celsius, the water in the formulation freezes, causing physical damage to the coating. Freezing may form ice crystals, which disrupt the emulsion structure of the polyurethane, leading to irreversible separation, thickening, or gelation.
Q2: What factors affect the curing speed of polyurethane?

Air temperature, humidity, mixing ratio, coating thickness, air circulation, substrate properties, and atmospheric pressure—all of these factors can affect the curing speed.
Q3: What are the factors that may affect the film-forming quality of moisture-cured one-component polyurethane？

There are several factor affect the drying speed for on-component Substrate profile; Air humidity; Substrate humidity; Coating thickness, etc.
Q4: What are the differences between aliphatic polyurethane and aromatic polyurethane?

The core difference between aliphatic polyurethane and aromatic polyurethane originates from the presence or absence of aromatic groups (such as benzene rings) in their molecular structures. This structural disparity directly leads to significant differences in their properties and application scenarios. The typical raw materials for aliphatic PU are hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), etc. The typical raw materials fo aromatic PU are Toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), etc. Due to the absence of benzene rings, the molecular structure exhibits stronger stability against ultraviolet (UV) light, with excellent weather resistance. It is less prone to photo-oxidative degradation, maintaining color stability and resisting yellowing after long-term exposure to outdoor or light environments.
Q5: What are the uses of exposed polyurethane?

Exposed polyurethane is widely used in scenarios requiring long-term outdoor exposure or harsh environments due to its excellent weather resistance, mechanical properties, and environmental adaptability. Below are its typical application areas and technical analysis: Roof waterproofing and refurbishment, outdoor water tank, footbridges, balconies, terraces, roof walkways, parking garages, and other outdoor waterproof projects with pedestrian and/or vehicular traffic.