#waterproof liquid for roof
Sunanda Global’s Long-lasting Waterproof Liquid for Roof
Waterproof liquid for roof is an advanced coating technology that creates seamless, flexible membranes directly on roof surfaces. Unlike traditional sheet membranes, liquid-applied systems eliminate joints and seams, providing complete protection against water ingress while accommodating structural movements and thermal expansion. This is crucial for roof protection as liquid waterproofing adapts to complex geometries, penetrations, and details that sheets cannot address. Modern waterproof liquid for roof offers extreme temperature flexibility and long-term durability across diverse climatic conditions. Sunanda Global offers the best chemical solutions for RCC roof slabs, podiums, parking garages, bridge decks, water retaining structures, landscaped areas, terrazzo and tile underlayment, shower pans, kitchen, and external walls.
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SUNPRUFE PU1K: Polyurethane Waterproofing and Sealing Membrane
- Slabs of RCC roofs, podiums, parking garages, and RCC walls
- Bridge decks, shopping malls, plaza area
- Water retaining structures like OHWTs, UGWTs, ETPs, STPs, etc
- Landscaped areas
- Under terrazzo or tile floors, under shower pans, kitchen, and bathroom floors
- Free the surface to be coated of all foreign matter, dirt, dust, paint, oil, grease, etc, using a stiff nylon or steel-bristled brush
- Fill all voids and cracks and level all irregular surfaces with polymer-modified repair mortar.
- Allow it to cure for at least 24 hours
- Prime the surface using SUNPRIME PU
- Air cure for 30 minutes before applying 1st coat of SUNPRUFE PU1K
- The material should be applied in two coats at a dosage of 1.2 – 2.3 Kg/m2 as per the required DFT
- Once the coat is allowed to cure until ‘tack-free’, apply the second coat of SUNPRUFE PU1K
- Allow it to air cure for a minimum of 12-48 hours, depending on the ambient conditions
- Prepare the surface thoroughly by cleaning, washing, and removing dust, dirt, oil, grease, and loose particles.
- Damaged portions of existing roofs must be repaired with polymer-modified mortar.
- Prime the surface with POLYALK WP or SUNPRIME WP
- After the primer is cured, apply two coats of SUNKOTE WP+ with an interval of 24 hours between coats
- The second coat should be applied perpendicular to the first coat which ensures uniform masking & even application
- Allow the membrane to cure for 24-48 hours and carry out a protective screed layer with adequate slope
SUNKOTE WP+: High-Build Acrylic Waterproofing Coating
- All types of RCC surfaces, such as roofs, chajjas, parapet walls, external walls, sunken areas, toilets, etc.
- Can be used for flat as well as sloping roofs, existing and new
- High build, strong, thick, elastomeric, liquid-applied waterproofing membrane system
- Makes for a highly elastic & resilient coating to withstand cracks up to 2 mm as well as accommodate thermal movements
- Resistant to UV with anti-fungal properties
- Higher tensile strength, tear resistance & adhesion to substrate
- Non-toxic in nature, and the membrane allows the concrete surface to breathe
- Prepare the surface thoroughly by cleaning, washing, and removing dust, dirt, oil, grease, and loose particles.
- Damaged portions of existing roofs must be repaired with polymer-modified mortar.
- Prime the surface with POLYALK WP or SUNPRIME WP
- After the primer is cured, apply two coats of SUNKOTE WP+ with an interval of 24 hours between coats
- The second coat should be applied perpendicular to the first coat, which ensures uniform masking & even application
- Allow the membrane to cure for 24-48 hours, then apply a protective screed layer with an adequate slope.
SUNKOTE WP+: High-Build Acrylic Waterproofing Coating
- All types of RCC surfaces, such as roofs, chajjas, parapet walls, external walls, sunken areas, toilets, etc.
- Can be used for flat as well as sloping roofs, existing and new
- High build, strong, thick, elastomeric, liquid-applied waterproofing membrane system
- Makes for a highly elastic & resilient coating to withstand cracks up to 2 mm as well as accommodate thermal movements
- Resistant to UV with anti-fungal properties
- Higher tensile strength, tear resistance & adhesion to substrate
- Non-toxic in nature, and the membrane allows the concrete surface to breathe
- Prepare the surface thoroughly by cleaning, washing, and removing dust, dirt, oil, grease, and loose particles.
- Damaged portions of existing roofs must be repaired with polymer-modified mortar.
- Prime the surface with POLYALK WP or SUNPRIME WP
- After the primer is cured, apply two coats of SUNKOTE WP+ with an interval of 24 hours between coats
- The second coat should be applied perpendicular to the first coat, which ensures uniform masking & even application
- Allow the membrane to cure for 24-48 hours, then apply a protective screed layer with an adequate slope.
POLYALK WP: Polymeric Waterproofing Coating
- Roof slabs – flat or sloping, chajjas, folded plate roofs, vaulted roofs, domes, etc.
- Flooring, external walls
- Sunk and non-sunk portions of bathrooms, toilets, balconies, etc.
- Overhead or underground water tanks and other large reservoirs
- Mortars for filling joints of C.I. or any other drainage pipes
- As a protective coating to RCC floorings, substructures against sulphate attacks
- It can be easily mixed with cement, forming an impermeable co-matrix film
- Alkaline and compatible with concrete
- It does not facilitate carbonation
- It can be applied in moist and damp conditions, e.g., exteriors, and terraces in wet spells of the monsoon
- It can be applied in underground and/or overhead water tanks almost immediately after emptying
- High flexural strength and extraordinary adhesion of the polymer
- It can be used as a base waterproofing coat on external walls, and after curing, it can receive SUNEXT 8
- Surface preparation is significant
- Scrub and clean the surface
- Remove laitance, dirt, paint, loose flakes, particles, foreign matter, etc.,
- For cleaning, you can use a vacuum cleaner, a high-pressure water jet, wet sandblasting, or wire brushing
- Ensure that the concrete surface possesses an open pore surface texture
- Repair any faulty concrete in the form of cracks, honeycombing, etc.
- Fill hairline cracks on plaster/mortar fill the same with POLYFILL AR as per specifications
- Remove all curing compounds and sealers
- Moisten the surface with a water jet 24 hours before applying POLYALK WP
- Mix 1 part of POLYALK WP and 1 or 0.25 parts of fresh white or grey cement
- Continuous hand-mixing to form a lump-free consistency may also be adequate
- Keep the mix continuously stirred
- Apply the slurry by brush/roller to the damp surface
- Apply two/three more coats of similar slurry at 24-hour intervals
- Allow setting for 24-48 hours
- Cure the coating for 2-3 days by sprinkling water on the vertical surface (external walls) three times a day
- Use moist gunny bags on horizontal surfaces (terraces, toilets, etc.).
- Provide a protective screed/plaster for flat surfaces on the POLYALK WP coating
- For external surfaces, provide a protective coating of SUNEXT 8
FAQs
What do you mean by waterproof liquid for roof, and how does it work?
Waterproof liquid for roof is a coating applied directly onto surfaces, forming a seamless, flexible membrane. It penetrates cracks and adheres strongly, creating a watertight barrier that prevents leaks and protects against water damage.
Which type of waterproof liquid for roof is best for the Indian climate?
Polyurethane, polymeric, and acrylic-based liquid membranes work best for Indian climates. They offer excellent resilience and withstand monsoon rains effectively while preventing thermal expansion cracks on concrete roofs.
Can waterproof liquid be applied to old roofs?
Yes, it can be applied to old roofs. After proper surface cleaning, crack repairs, and primer application, the liquid waterproofing bonds strongly to existing surfaces, providing seamless protection without removing old materials or requiring extensive renovation
Is a professional application necessary for roof waterproofing liquids?
While a DIY application is possible for small areas, a professional application ensures proper surface preparation, correct primer usage, uniform coating thickness, and adequate curing time, which are critical factors that determine long-term waterproofing effectiveness and warranty coverage.
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