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building waterproofing material

Flexible Polyurethane Waterproof Coating


self adhesive roofing waterproof membrane

Short description:

Polyurethane coating(PU coating)
Appearance: Liquid
Main Raw Material: Polyurethane
Packing: 20kg/pail
Colors: Red, blue, white, gray, black, etc
Using Method: Spray
Drying method: Air Drying
Application: waterproofing of rooftop toilet & kitchen waterproofing, underground, basement waterproofing, parking lot waterproofing, bridges, road surface, etc

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Product Details


SINOMTC is one of the largest China manufacturers and suppliers of building waterproofing materials.

SINOMTC Polyurethane Waterproof Coating (PU coating) is a reactive moisture-curing(Waterbased Single part PU Coating) one-component coating and also a kind of polymer waterproof coating. It is a Water-based Single part PU Coating that is made with isocyanate and polyether as the main raw material, mixed with plasticizer, solid agent, and other additives, and produced through the reaction of high-temperature dehydration and polymerization by using advanced production technology. It is widely used for floor waterproofing, roof waterproofing, wall waterproofing works, and many other civil engineering waterproofing and industrial waterproofing construction works.

Product Feature of Flexible Polyurethane Waterproof Coating

1. Eco-Friendly and Easy to use: Single-component polyurethane coating is ready for use on-site which makes the construction simple and fast. Solvent free, consisting of a 100% solids formula. Polyurethane products are considered environmentally friendly.

2. Beautiful appearance: the color is adjustable to customers’ demands.

3. Excellent performance in anti-aging, acid and alkali resistance, fatigue resistance, high and low-temperature resistance, anti-corrosion, mildew resistance, good water resistance, high tensile strength, and elongation, there is no seam after the film is formed.

4. Thermal Stability: Thermal stability to temperature variations. Weather variations hardly influence coating performance or adhesion properties.

5. Chemical Resistance And Mechanical Properties: Impressive chemical resistance and exceptional mechanical properties. Almost no coating can compare to Polyurea when it comes to attainable physical properties.

6. Insensitivity To Humidity: Polyurea is hydrolytically stable so relative humidity or residual moisture has little to no effect on adhesion or coating performance.

7. Ultra Fast Curing: Return to service or to further procession comes many times faster than traditional coatings. Gel time is achieved within seconds.

8. Good Adhesion: Good adhesion to a variety of different substrates (concrete, metals, wood, etc.) even under high humidity and extreme temperatures.

9. Applicable On Vertical And Curved Surfaces: Complicated architectural structures and details can be coated in almost any desired thickness, without sagging.

10. Monolithic, Seamless Membrane After Curing: These membranes are vapor permeable, preventing moisture accumulation.

Application Scope of Flexible Polyurethane Waterproof Coating

1. Widely used in basement waterproofing, roofing waterproofing, kitchen flooring, and wall waterproofing, swimming pools waterproofing, fountains waterproofing, waterproofing of landscape pools, antiseepage of subways, moisture-proof of tunnels, Underground engineering, Aquarium lining, Cold storage areas, and other projects for civil engineering waterproofing and industrial waterproofing construction.

2. Especially good for waterproofing irregular areas of the projects and vertical or horizontal areas of pipelines, as well as sealing and reinforcing treatment of the openings and joints.

Application Methods of Flexible Polyurethane Waterproof Coating

1. The substrate treatment: substrate must be firm, smooth, clean, dry, and free of sharp projections, all the holes need to be repaired by cement mortar, and other defects also should be repaired.

2. The details treatment: inside corner and outside corner should be rounded into a circular arc shape, the inside corner which D is ≥ 50mm, the outside corner which D is ≥ 10mm, brushing a layer of paint, and then non-woven reinforcement layer must be added on it and soaked by the coating completely.  

3. Apply the coating on the bottom of an uneven surface: first, pour the liquid into the container, and stir with a mixer, the stirring time should not be less than 2 minutes, stirring evenly apply the coating with a rubber scraper.

4. Waiting time for application: the coating surface dry time is about 12 hours according to the construction site conditions, and the interval time based on the coating film is not sticky when touched by hand.

5. Sprinkle sand: As for vertical or large slope waterproof layer, in order to increase the bonding strength between the waterproof layer and cement mortar, in front of the final coating curing, sprinkle clean coarse sand (2-3mm in diameter) in the surface.

Application Advice for Flexible Polyurethane Waterproof Coating

1. Once opened, it must be used up, and in case of unused material, it must be completely sealed in time.

2. The construction temperature should be above 5°C, and keep working areas ventilated and avoid fire and rain.

3. Steps and stacking debris are not allowed before the waterproofing layer is dry and completely formed to avoid damage to the waterproof layer.

Transportation & Storage of Flexible Polyurethane Waterproof Coating

  1. The product should be sealed and stored in a dry, ventilated, and cool warehouse.

2. Being Close to the source of fire is strictly prohibited, and the storage period is one year, which is the time passed one-year products must be re-checked before use.

3. Protect against sun and rain during transportation, prevent a collision, keep packing intact, and prohibit access to the fire source.

Performance Test Report of Flexible Polyurethane Waterproof Coating

S/NTest ItemModel IModel II
1Solid content≥ 85%≥ 85%
2Tensile strength≥ 6Mpa≥ 12Mpa
3Elongation at break≥ 450%≥ 250%
4Low-temperature bending-35℃, No crack-35℃, No crack
5Impermeable0.3Mpa 120min, Impermeable0.3Mpa 120min, Impermeable
6Surface dry time≤ 12hrs≤ 12hrs
7Dry time≤ 24hrs≤ 24hrs
8Bonding strength≥1 Mpa≥1 Mpa

If you want to know more about it, please contact us at carlos@onices.com

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