Shanghai Sepna Chemical Technology Co.,Ltd
Polyurethane Waterproof Coating

Polyurethane Waterproof Coating

Polyurethane Coating SP831 ◆Detailed Product DescriptionPolyurethane coating applied on substrates, to form a film, soft and seamless sealing film by chemical reaction with moisture in the airFeature

    If you are planning to wholesale best cheap and high quality polyurethane waterproof coating China, or hot sale polyurethane waterproof coating in China from professional polyurethane waterproof coating manufacturers and suppliers and factory, please feel free to contact SEPNA, and welcome to check products price with us.

    Polyurethane Coating SP831  

    ◆Detailed Product Description

    Polyurethane coating applied on substrates, to form a film, soft and seamless sealing film by chemical reaction with moisture in the air


    1. Pure polyurethane sealant,environment-friendly.

    2. Contains no asphalt, tar or any solvents, no harm to construction personnel.  

    3. Free from pollution to the environment, No toxity after curing, No corrosion to base material, High solid content.   

    4. One component, convenient for construction, No need of mixing, surplus products should be kept in good airproof package.

    5. Efficient: High strength and elasticity, resistant to acid and alkali, excellent bonding effect with concrete, tile and other substrates.

    6. Cost-effectice: the coating expands a little after curing, which means it turns a little bit thicker after curing.

    7. All items tested exceeds nation standard GB/T19250-2003


    1. Waterproofing for basement, kitchen, bathroom, underground tunnel, deep wells structure and normal decoration.

    2. Leak-proofing and penetrating-proofing of Reservoirs, water towers, swimming-pool, For Bath-pool, fountain pool, impounding reservoir, sewage cleaning pool and irrigation channel.

    3. Used for preventing of leaking, corrosion and penetrating for water tanks, underground Pipeline.

    4.Bonding and moisture-proofing of various floor tiles, marble ,asbestos plank and so on

    ◆Data Table

    Model Number

    SP 831





    Sagging properties(mm)


    Tensile strength(Mpa)


    Elongation at break(%)


    solid content(%)


    Touch dry time(h)


    Pollution properties


    Application temperature(℃)


    Shelf life(month)



    ①All data above ware tested under standardized condition.

    ②All data listed in the chart were for rhe generalized item in the series; please refer to the related datasheet for special items.

    ③Storage condition has a direct impact to the products’ shelf life, Please refer to the instruction for special items’ storing.



    The substrate should be smooth, solid, clean, dry without sharp concave and convex points, honeycomb, pocking marks, peeling, free of bulges, greasy before application. it is better coating 2 times with scraper. When the first coat isn’t sticky, the second coat can be applied, the first layer is recommended being applied in thinner layer for better releasing gas generated during reaction. The second coat should be applied in different direction to the first coat. The optimal coating rate is 2.0kg/m² for thickness of 1.5mm.

    Attention of operation

    Wear suitable protective clothing, gloves and eye/face Protection. After contact with skin, wash immediately with plenty of water and soap. In case of accident or if you feel unwell, seek medical advice immediately

    ◆Package and Storage

    Package                                Storage  

                                                  Keep in cool and ventilative place

    25kilo/pail                              Temperature≤25℃, humidity≤50%RH

    Color: Black, Gray                  Shelf life: 9 months

    ◆Safety Operation Material

    MSDS isn't included here. Please read TDS, MSDS and label carefully before operation. You can get MSDS from SEPNA or other distributors, or mail to service center, or call +86-400-882-1323.

    ◆Product Warranty

    All product properties and application details based on information believe to be reliable and accurate. But you still need to test its property and safety before application. The advices we supply don't apply in any circumstances. SEPNA don't make assurance of any other applications outside the specification until SEPNA supply a special written guarantee. SEPNA is only responsible to replace or refund if this product is defective within the warranty period stated above. SEPNA makes it clear that will not be liable of any accidents.

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