Polyurethane waterproof coating A STD-939

Polyurethane waterproof coating A STD-939 About

Product Description

The polyurethane prepolymer has a high resin content with excellent ratio of NCO, which can form a highly dense and elastic waterproof membrane after being cured and shaped by the curing agent.Our companys several types of polyurethane prepolymer, with our corresponding curing agent, can reach different levels of waterproof membrane.The mixture is easy to apply, and can be applied by roller application or spray application according to the requriement of the project.

Usage

After mixing the polyurethane prepolymer with its corresponding curing component in the recommended ratio and ensuring thorough stirring,apply it using roller coating or spray coating methods.

parameter

Item	979-A	939-A	911C-A	911D-A
NCO content (%,1)	4.7	6.7	3.3	4.5
Appearance	Colorless or pale yellow liquid
Viscosity (23 2 , mPa. s)	6000-10000	5000-8000	700-1200	4200-4800
The physical properties of the membrane formed after mixing the polyurethane prepolymer with the STD compatible curing component.
STD curing component	979-B	939-B	911C-B	911D-B
Weight ratio(A:B)	1:01	1:02	1:03	1:04
Solid content (%)	98	98	92	92
Tensile Strength (MPa)	3.5	6	2	2
Elongation at Break (%)	450	450	500	500
Tear Strength (N/mm)	25	35	15	15
Impermeability	0.4MPa, 2h	0.4MPa, 2h	0.6MPa, 2h	0.6MPa, 2h
Bonding Strength (MPa)	2.5	2.5	1	1
Note: The physical property data mentioned above are solely based on tests conducted on samples of the membrane formed after mixing the polyurethane prepolymer with the STD compatible curing component and do not represent the physical properties of the polyurethane prepolymer itself.

Product Features

Scientific configuration: High resin content with scientific ratio of NCO, ensuring excellent performance and durability.

High density and elasticity: The forming waterproof membrane that is highly dense and elastic, providing superior protection against water infiltration.

Easy application: The mixture of the polyurethane prepolymer and curing agent is supporting roller or spray application methods for convenient application on different surfaces.

Durable and reliable: The waterproof film formed by the polyurethane prepolymer is durable and reliable, providing long-lasting protection against water damage and leakage.

Packaging

20kg/pail, 200kg/drum

Shelf life

12 months

Storage and Transportation

Storage: Store the polyurethane prepolymer in a dry, cool, and well-ventilated environment, avoiding direct sunlight and exposure to extreme temperatures. The storage temperature is typically between 15C and 25C. Additionally, avoid contact with water, acids, bases, and other harmful substances.

Secure Stacking: Stack the buckets or drums securely to prevent them from falling or rolling. Use appropriate securing devices like straps or brackets to ensure stability during transport.

Leak Prevention: Ensure that the buckets or drums are tightly sealed to prevent any leaks. Leaks can lead to environmental pollution, safety hazards, and loss of product.

Secure Loading: When loading the buckets or drums onto the transport vehicle, ensure that they are properly secured and distributed evenly to avoid any imbalance or overloading.

Emergency Preparedness: Have an emergency response plan ready, including contact information for emergency services and procedures to follow in case of leaks, spills, or accidents.

Powerful Waterproof Protection

Polyurethane Waterproof Coating A STD-939 delivers superior resistance against water infiltration across a variety of construction projects. Its advanced formulation ensures roofs, tunnels, basements, and water tanks are safeguarded from leaks and moisture damage, increasing the longevity of your infrastructure.


Consistent Quality Assurance

Every batch of STD-939 is manufactured under rigorous quality control methods, guaranteeing a uniform standard for industrial applications. Whether you require a small quantity or a bulk order, you can count on product integrity and reliability every time.


Flexible Packaging and Storage

Available in plastic drums and IBC containers, this coating is tailored for large-scale projects and storage flexibility. When stored in original, sealed packaging in cool, dry environments, the coating remains stable and effective for up to 12 months.