Liquid waterproofing membranes are liquid, applied like paint or spray, etc., which take the form of highly flexible (very high elongation) monolithic (jointless) membranes with excellent waterproofing capabilities. We have developed liquid-applied waterproofing membranes, such as polyurethane waterproofing and sealing membrane, polyurea membrane, hybrid polyurea membrane &, etc., from numerous compounds to fix the leakages.

ELASTOROOF PU: 1K polyurethane waterproofing and sealing membrane
  • Ideally suited for waterproofing slabs of RCC roofs, podiums, parking garages
  • Waterproofing bridge decks, shopping malls, and plaza areas
  • Waterproofing water-retaining structures
  • Waterproofing landscaped areas due to anti-root properties, OHWT, UHWT, ETPs, STPs, etc
  • Suitable for waterproofing under terrazzo or tiles floors, under shower pans, kitchen, and bathroom floors
  • Suitable for water storage tanks and on the inside of elevated swimming pools
  • It can be used for flat and sloping roofs, existing and new
  • As a damp proof course applied under the first layer of bricks or blocks in masonry works
  • Single component and easily applied by brush, roller, wiper, squeegee, airless spray
  • One Pack System. No mixing involved
  • Adheres strongly to the surface of concrete and remains flexible under extreme temperature conditions
  • It provides seamless waterproofing, unlike sheet-type membrane
  • Due to the application procedure, there is a significant reduction in labour costs and application time
  • A strong, thick, flexible membrane eliminates the need for a reinforcing layer
  • It can be directly applied to the primed concrete surface if the concrete is in good, sound condition
  • We recommend that 1.5 kg per sq m be applied for two coats of this type of application
  • Apply the 1st coat of ELASTOROOF PU by brush, roller, airless spray, or squeegee to all surfaces @ 1 kg/sq m
  • The ELASTOROOF PU material should then be allowed to cure until tack free
  • It is recommended that, ideally, this be left overnight
  • Apply the 2nd coat of ELASTOROOF PU by brush or squeegee to all surfaces @ 0.5 kg/sq m
  • It is recommended that this 2nd coat be applied at right angles to the first
  • Sprinkle the sand over the 2nd coat while slightly tacky to make it rough enough for a protective screed
  • Cure the membrane for a minimum of 12 - 48 hours, depending on ambient conditions
  • Protect the membrane with a cement-sand dash coat before laying any tiles or other surfacing 
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ELASTOROOF 2K: 2K polyurethane waterproofing membrane
  • Exposed RCC roofs, decks, slabs, and podiums
  • Car parks and ramps, bridge decks
  • Compactor room floors, plant rooms, and washrooms
  • Sports stadiums, swimming pools
  • Water retaining structures
  • Basements, retaining walls, pile caps
  • Landscaped areas
  • A membrane as protective, impact-resistant flooring for laboratories, sports centres, and gyms
  • Applicable to clean, dry, stable surfaces such as concrete, precast concrete, fibre cement sheet, concrete masonry, brick, render, metals, and plastics.
  • Long-lasting and flexible with technology to preserve plasticizers
  • High mechanical strength
  • Unique damage detection with a twin-colour system
  • Easy application process unaffected by moisture
  • Suitable for both vertical and horizontal surfaces
  • Quick application and curing
  • Strong adhesion to the substrate
  • Monolithic structure for seamless waterproofing
  • Resistant to puncture, damage, and ponded water
  • Reduces labor costs and application time
  • Thick, flexible, and durable membrane
  • UV-resistant and non-yellowing
  • Hard-wearing with a non-slip surface
  • Highly elastic with excellent crack-bridging properties.
  • Excellent chemical resistance
  • Apply ELASTOROOF 2K directly to the primed concrete surface in good condition.
  • Apply 1.5-2.6 kg per sq. m. in two coats.
  • First coat: Use a brush, roller, airless spray, or squeegee. Apply 1-1.3 kg per sq. m. and let it cure overnight.
  • Second coat: Apply 0.5-1.3 kg per sq. m. using a brush, squeegee, or airless spray.
  • Cure for 12-24 hours. Broadcast nonslip aggregate on the wet second coat.
  • Ideally, perform hydro-testing for at least 72 hours to ensure membrane integrity.
  • After testing, protect the membrane with a cement-sand dash coat before installing tiles/another surfacing. Alternatively, limit foot traffic on the exposed membrane.
SUNROOF PU: Waterproofing and sealing membrane
  • Waterproofs all types of RCC surfaces (roofs, chajjas, parapet walls, external walls)
  • Suitable for flat and sloping roofs (existing and new)
  • Used as a damp proof course under the first layer of bricks or blocks in masonry works
  • Strong, thick, flexible membrane eliminates the need for reinforcement
  • Does not stain tiles or marble
  • UV resistant
  • Can be applied on damp, visibly dry surfaces without blistering
  • Suitable for confined areas (non-odorous formulation)
  • Single component, easy brush, and roller application
  • Non-toxic, allows the concrete surface to breathe
  • Environmentally friendly, no harmful fumes or gases
  • New concrete slabs: Allow full curing before application.
  • Old concrete surface: Thoroughly prepare by cleaning, washing, and removing debris.
  • Existing roofs: Check substrate condition and repair damaged areas with polymer-modified mortar.
  • Render: Cure new surfaces for at least 7 days.
  • Remove any bitumen-based waterproofing coating before SUNROOF PU treatment.
  • Identify, clean, and treat surface cracks and construction joints.
  • Priming: Use SUNPRIME adhesion promoter primer before applying SUNROOF PU.
  • Apply SUNROOF PU in two coats, 1 kg/m2 in the first coat and 0.5 kg/m2 in the second coat. Allow 4-6 hours between coats.
  • Apply a thin continuous layer over the waterproofing area.
  • Finish with a client-specified appropriate course to protect the waterproofing membrane.
FLEXIROOF PU: Single component modified polyurethane elastomeric membrane
  • Ideally suited for waterproofing of two-course concrete slab construction for parking garages,
  • Waterproofing decks, shopping malls
  • Suited for waterproofing of two-course concrete slab construction for  plaza areas, bridge decks, etc
  • Suitable for waterproofing under terrazzo or tile floors, under shower pans, kitchen, and bathroom floors
  • Suitable for waterproofing water storage tanks and on the inside of elevated swimming pools
  • Conforms to ASTM C 836
  • Easy to apply by brush, roller, or spray
  • It provides seamless waterproofing, unlike sheet-type membranes
  • Adheres strongly to the surface of concrete and remains flexible under extreme temperature conditions
  • Clean the surface to be coated with a stiff nylon or steel bristled brush.
  • Fill all voids and cracks more than 3mm in depth
  • Level all irregular surfaces with a latex-modified repair mortar screed
  • Allow it to cure for at least 48 hours (fresh cure for at least 7 days) before application.
  • Apply a thin coat of FLEXIROOF PU primer with a brush.
  • Then apply the 1st coat of FLEXIROOF PU, followed by the 2nd coat.
  • Cure for 10 - 14 hours before each application for best results.
  • Sandwich between the layer of cement slurry/screed
  • Allow it to set for 48 hours.
SUNKOTE: Single component liquid applied elastomeric waterproofing membrane
  • Waterproofing for all types of RCC surfaces such as roofs, chajjas, parapet walls
  • Waterproofing external walls, sunken areas, toilets, etc
  • Flat as well as sloping roofs
  • Conforms to IS 101, ASTM D 638, ASTM D 412, DIN 1048
  • A strong, thick, elastomeric, liquid-applied waterproofing membrane system
  • UV resistant
  • Single component and easily brush, roller, or spray applied
  • Non-toxic in nature
  • The membrane allows the concrete surface to breathe
  • Higher tensile strength, tear resistance & adhesion to the substrate
  • Prime the surface using SUNPRIME at the rate of 8 - 10 M2/kg/coat
  • Apply 3 coats of SUNKOTE at the rate of 2.5 - 3.5 M2/kg/coat with an interval of 6 - 8 hours between coats
FLEXITOP POLYUREA: Polyurea membrane
  • General water isolation: Water tanks, pools, swimming pools, ponds, pipes, pipelines, waste water treatments, manholes, and sewer linings.
  • Floors: Industrial floors, hospitals, factories, parking lots, and garages.
  • Truck bed liners.
  • Construction: Roads, bridge decks, railways, high-speed railways, tunnels, airports, and line striping.
  • Marine industry and marine applications.
  • High abrasion applications: Oil and gas industry, refineries, petrochemical industry, mining, secondary containment, and energy industry.
  • Leisure industry: Water parks, aquarium linings, playgrounds, theme parks, and decorative applications.
  • Joint fill and sealant
  • Below ground waterproofing
  • Pipe/pipeline coating
  • Bridge/bridge deck waterproofing
  • Tank coating-sewage treatment plant internal tank lining
  • Marine environment
  • Roof waterproofing
  • Secondary containment
  • Airports and refineries
  • Treats various surfaces: concrete, metal, ceramic, sheets
  • Non-skid coating with light foot traffic in 15 minutes
  • Excellent waterproofing
  • Fast turnaround time
  • Sound dampening
  • High impact and UV resistance, thermal
  • Excellent chemical resistance and puncture stability
  • High friction coefficient
  • Used for containment and secondary containment
  • No cracking or warping
  • Protects against rust and rot
  • Faster production than paint
  • High flexibility and elongation
  • Enhances reinforced concrete durability
  • Low permeability at -30°C to 70°C
  • Seamless and monolithic, including field joints
  • FLEXITOP POLYUREA is sprayed using a 1:1 volume ratio with airless spray equipment.
  • Choose the appropriate primer based on substrate and weather conditions. Allow it to cure as directed.
  • Follow the start-up procedure for the airless spray equipment.
  • Test spray surface for compatibility.
  • Apply the first coat and the second one in the opposite direction using the cross-hatch technique. Each coat should have a typical thickness of 1.5 mm to 3 mm.
  • FLEXITOP POLYUREA coating achieves handling strength within 20 to 30 minutes.
FLEXITOP POLYUREA-H: Hybrid polyurea membrane
  • Waterproof protective membrane for concrete and steel in a wide range of environmental conditions
  • Corrosion-resistant as it provides a tough barrier against moisture, oxygen, and chlorides
  • It can be used in below-grade waterproofing applications
  • General water isolation-water tanks, pools, swimming pools, ponds, pipes, pipelines
  • Wastewater treatments, manholes, sewer linings, roof coatings
  • Floors-industrial floors, hospitals, factories, parking lots, garage
  • Waterproofing of bridge decks, railways, and high-speed railway bridge decks, tunnels, airports
  • Suitable for the marine industry and marine applications
  • Suitable for high abrasion applications-oil and the gas industry, refineries, and petrochemical industry
  • Suitable for mining, secondary containment, energy industry
  • Waterproofing in leisure industry-water parks, aquariums linings
  • Waterproofing playgrounds, theme parks, and decorative applications
  • Roof waterproofing
  • Useful in applications of joint filling and sealing
  • Excellent chemical resistance, thermal stability, and UV resistance (some discoloration will occur)
  • Very fast turn-around time
  • Excellent impact, abrasion, and puncture resistance
  • Seamless and monolithic, including field joints
  • Significantly enhances the durability of reinforced concrete
  • Applicable even on the irregular surface
  • Low permeability values
  • Good anti-rooting properties
  • It can be applied at ambient temperatures from - 30°C to 70°C
  • Anti-root properties
  • Easy to apply
  • Excellent flexibility under low temperatures
  • All concrete surfaces should be clean, dry, and free from contamination
  • The blasting may be used to remove contaminants, laitance, weak concrete, and exposed blowholes
  • The blasting produces a sound concrete surface with adequate profile and surface porosity
  • You can use dry abrasive, wet abrasive, vacuum-assisted abrasive, and centrifugal shot blasting
  • Fill all blow holes and minor surface imperfections with recommended filler before application of primer
  • The surface must be bone dry with less than 4% moisture
  • Check it with a digital moisture meter before the application
  • The surface has to be primed to achieve an even surface and good adhesion
  • A choice of primers is available depending on the type of substrate and weather condition
  • Optionally, lightly spread out with quartz sand over the tacky primer as required
  • The above task gives higher adhesion
  • The task also extends the maximum inter-coat interval of primer before the application of the coating
  • To avoid the formation of blisters, do not spread to excess
  • Open FLEXITOP POLYUREA-H part A and part B container
  • Stir individual containers separately very well to get a homogeneous mixture
  • Add part A and part B proportionally, as given in the technical datasheet
  • Stir it well using a handheld low rpm (200 - 300) stirrer for 2 - 3 minutes until the mixture becomes uniform
  • Use an airless spray gun, roller, or brush  to apply the mixture
  • Apply the mixture as a base coat on the primed surface at the rate of 0.4 - 0.5 Kg/m2
  • Apply 2nd coat at same coverage after 4-6 hour interval
  • For higher thickness, additional coats may be applied
  • Surfaces with higher porosity may be primed with two coats of primer
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SUNDEKOTE MMA: Methylmethacrylate waterproofing membrane
  • Bridge decks, culverts, pedestrian and vehicular trafficked areas
  • Stadium terracing, tunnels, dam structures, offshore platforms, etc
  • Waterproofing membrane for roofs, decks, podiums, and other RCC structures.
  • It provides a complete waterproofing system to protect against water and chloride ions.
  • Sub-grade waterproofing for buildings and civil engineering structures, including underground slabs.
  • Waterproofing for concrete and metal bridges, including under-track ballast for railway bridges.
  • Waterproofing for pedestrian and vehicular trafficked areas (balconies, car parks, etc.).
  • Waterproofing for containment structures, such as reservoirs and storage for waste and contaminated materials.
  • Highly flexible with crack-bridging capability
  • Suitable for horizontal and vertical surfaces
  • Excellent waterproofing
  • High impact and puncture resistance
  • Resistant to stress and substrate movements
  • Strong adhesion to various substrates
  • High bond strength
  • Good chemical and abrasion resistance
  • Applicable in a wide range of temperatures (-10°C to +35°C)
  • No heating is required for spray equipment
  • Easy repair with excellent inter-layer adhesion
  • Flexible overcoating time
  • Fully cured within one hour
  • Long-lasting and effective
  • Solvent-free and fully reactive
  • SUNDEKOTE MMA is spray applied using a 1:1 volume ratio, high-pressure pneumatic airless mixing, and spray equipment.
  • Prime the surface with a suitable primer before applying SUNDEKOTE MMA.
  • Spray apply SUNDEKOTE MMA to achieve a minimum dry film thickness of 2mm.
  • Apply a bond coat over SUNDEKOTE MMA as a waterproofing membrane on road bridges under asphalt surfacing.


Liquid-applied waterproofing is a method used to protect various surfaces from water and moisture damage. It involves applying a liquid-based coating, typically made from polymers like polyurethane or acrylics, directly onto the surface. This coating dries or cures to form a seamless, flexible, and durable waterproof barrier. This method is favored as it is joint free, is able to adapt to surface irregularities and undulations, for its adaptability, strong adherence, and effectiveness in providing long-lasting water-resisting protection.
The best liquid membrane waterproofing depends on the specific requirements of the project, including the type of surface being treated, environmental conditions, and desired durability. However, some of the best ones are SUNPROOF PU 1K, polyurethane waterproofing membrane, SUNKOTE WP+ single component elastomeric waterproofing membrane, POLYALK WP polymeric cementitious waterproof coating, etc.
Yes, a liquid waterproofing membrane is highly effective for protecting various surfaces from water damage. It offers seamless coverage, ensuring no gaps or weak points that can occur with sheet materials. The flexibility of these membranes allows them to adapt to structural movements and temperature changes, preventing cracks. Easy to apply, they are ideal for complex surfaces and challenging areas.
Liquid waterproof membranes can last 10+ years, but lifespan depends on type, application, and exposure. Quality membranes paired with proper installation can even last 60 years! Be sure to choose the right one for your surface and consider reapplying if needed to maintain protection.
Start by thoroughly cleaning and drying the area to be treated. Depending on the product manufacturer’s recommendation, you might need to apply a primer for better adhesion. The liquid membrane can then be applied using a brush, roller, or sprayer, making sure to apply multiple thin coats for optimal effectiveness. Each coat requires a specific amount of drying time, as indicated in the product's instructions. Bear in mind that, based on the type of membrane and environmental exposure, it might be necessary to reapply it every 5 to 10 years.