WATERPROOF COATINGS Liquid Membrane

Waterproof coatings are liquid-applied materials that cure to form a seamless, continuous waterproof membrane. We offer a complete range including, but not limited to, polyurethane, acrylic, polyurea, epoxy, modified bitumen, and cementitious coatings, with specialized series for classic, damp surface, water-based, high-temperature topcoat, and other conditions. These coatings feature excellent adhesion, flexibility, and weather resistance, adapting to complex substrates and detail joints. Widely used on roofs, bathrooms, balconies, basements, metal structures, and external walls. All coatings meet environmental standards, are easy to apply by spray or roller, making them ideal for detailed waterproofing and complex surface treatment.

TYPES OF WATERPROOF COATINGS

> KINJOYA PU 3H CLASSIC > KINJOYA PU AQR > KINJOYA PU HYD

Polyurethane Waterproof Coating

Reactive coating curing into elastic seamless membrane. Strong adhesion, water and abrasion resistance, accommodating substrate deformation. Available in one-component and two-component series for roofs, bathrooms, basements, and swimming pools.

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> JOYA FN HYDRALIA > KIN ARCOAT M

Acrylic Waterproof Coating

Water-based eco-friendly coating, easy to apply and fast-drying. Weather-resistant with color retention, combining waterproofing and decoration. Good breathability for roof renovation, external walls, metal roofs, and balconies.

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> KINJOYA PUA 3H CLASSIC

Polyurea Waterproof Coating

Spray-applied fast-reactive material with extremely rapid curing and high efficiency. Excellent elasticity, abrasion and chemical resistance, accommodating structural movement. Solvent-free and eco-friendly for high-speed railways and dams.

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> KINJOYA JX CLASSIC > JOYA FN EZSHIELD > JOYA FN EZFLEX

Modified Bitumen Waterproof Coating

Modified bitumen waterproof coating, cold-applied by spray or trowel, low substrate requirements. Available in classic and weather-resistant types, reinforces with polyester fabric. Ideal for roofs, basements, bridges, culverts—new build or maintenance.

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> KINJOYA EPI > KINJOYA EPT

Epoxy Waterproof Coating

Two-component epoxy system curing into dense, hard film with high bond strength and excellent chemical resistance. Non-toxic and odorless for basement slabs, sewage tanks, laboratories, and potable water tanks.

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> KINJOYA POLYMER CEMENT > KINJOYA CMCC

Cementitious Waterproof Coating

Cementitious waterproof coating, suitable for positive and negative side waterproofing of concrete structures. Our formulation includes a classic Polymer Modified Cementitious types and crystalline types, widely used for concrete protection in basements, pools, tunnels, and hydraulic engineering projects.

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Why Choose Waterproof Coatings in Building Waterproofing?

Waterproof coatings are essential complementary materials in building waterproofing systems. With their liquid application and seamless film-forming properties, they perfectly address complex details and irregular areas where membranes are difficult to apply. From roof details to pipe penetrations, bathrooms to balconies, coatings form continuous, dense waterproof layers that work together with membrane systems to create complete protection.

Seamless Film for Complex Details

Waterproof coatings are applied in liquid form, wetting the substrate thoroughly and flowing into fine cracks and depressions. After curing, they form continuous, seamless elastic films. This property makes them ideal for treating complex areas such as corners, pipe penetrations, drains and equipment bases, addressing issues like hollowing or edge lifting common with membranes at these points. Coatings bond firmly to substrates, effectively preventing water migration and ensuring detail reliability.

Flexible Application on Various Surfaces

Coatings can be applied by brush, roller or spray, adapting flexibly to different shapes and working spaces. Whether on vertical walls, around pipes or in tight corners, application is easily accomplished. They adhere well to various materials including concrete, cement mortar, metal and wood, making them suitable for different substrate types. The simple application process is ideal for renovation work and local repairs, requiring no heavy equipment, offering fast construction with minimal impact on surrounding areas.

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Flexible Application on Various Surfaces

Different Coating Types Adapt to Varied Project Conditions

Building waterproofing projects face diverse conditions, with different coating types developing specific performance advantages. Polyurethane coatings offer high elasticity and abrasion resistance ideal for roofs and basements prone to movement, with variants available for moist substrates. Acrylic coatings are water-based and eco-friendly, valued for weather resistance and color retention on exposed surfaces, where light colors can also reflect solar radiation. Polyurea coatings cure extremely fast for high efficiency, forming a strong, chemical-resistant film suited for railways and sewage tanks. Epoxy coatings provide high bond strength and a dense, hard film with outstanding chemical resistance for labs and industrial floors. Cementitious coatings bond well with concrete, offering a breathable yet watertight seal perfect for tanks and tunnels. Finally, rubberized asphalt combines waterproofing with elasticity for self-healing properties and convenient cold application in repairs. Selecting the right coating type is key to project success.

Key Steps in Waterproof Coating Application

Coating quality depends on strict process control. Start with a clean, dry, and sound substrate, applying primer if needed. Mix two-component coatings precisely and stir single-components thoroughly. Apply using multiple thin coats, alternating directions, and allow each to dry fully before the next. Reinforce details like corners and penetrations with fabric or extra coats. Avoid application in wet or humid conditions. Once cured, conduct a water test and protect the finished work from damage. Strict control at every step ensures long-term performance.