Yes, absolutely. We supply a comprehensive inventory of branded waterproofing products suitable for concrete roof slabs, bathrooms, balconies, water tanks, sumps, swimming pools, basements, and exterior blind walls with dependable islandwide delivery.

There is no generic one-size-fits-all product. The best material depends on the root cause of the leak, structural cracks, construction joints, slope, and existing coating. Simply share your slab details or photos with our specialists via Call or WhatsApp, and we will diagnose the situation and recommend the exact system—such as 2K flexible cementitious membranes or elastomeric crack-bridging waterproofing paints.

Not always. Permanent leak prevention requires proper surface preparation, repairing existing cracks with non-shrink polymer mortars, treating construction and expansion joints, and applying the coating at the manufacturer's prescribed thickness and coats. We provide complete step-by-step guidance on all these essential procedures with every purchase.

In certain circumstances, specialized transparent or elastomeric waterproofing systems can be applied over existing, well-adhered tiles without costly demolition. However, the condition of the existing tiles, grout joints, and sub-base must be evaluated first. Contact our team to find out if your surface qualifies for non-destructive waterproofing.

Substrate requirements depend on the chemical chemistry. While solvent-based coatings require a dry substrate, polymer-modified cementitious systems (like 2K HydroGuard) require a Saturated Surface Dry (SSD) condition—meaning thoroughly damp without standing puddles. We always provide clear technical instructions on required substrate moisture for your chosen product.

Yes, but all cracks must be treated beforehand. Hairline and structural cracks should be opened into a neat V-groove, cleaned, and sealed using elastomeric joint sealants or polymer-modified repair mortars before applying the main waterproofing membrane to avoid reflective cracking.

Using alkali-resistant fiberglass mesh is strongly recommended across critical stress zones—such as floor-to-wall junctions, pipe penetrations, corners, and existing crack lines. Embedding mesh between coats significantly enhances tensile strength and prevents tearing caused by building movements.

When premium-grade materials are applied strictly following technical guidelines—including thorough surface cleaning, correct thickness, and proper curing—a professional waterproofing system will protect your building for 10 to 15+ years. UV-resistant topcoats and regular maintenance further extend longevity.

Not at all! That is precisely what Nirmana Constructons is here for. Simply describe your problem, structure type, and dimensions—or share photos via WhatsApp—and our technical experts will select the exact products, calculate required quantities, and explain how to apply them.

Yes. Even the highest-grade chemical will fail if mixed with incorrect water ratios, applied onto a dusty surface, or rushed without proper inter-coat drying. To avoid costly contractor mistakes, we provide detailed application manuals and free verbal guidance directly to your mason, painter, or contractor.

Yes. We supply non-toxic, potable water-certified cementitious waterproofing systems that withstand continuous positive and negative hydrostatic water pressure without leaching harmful substances or chemicals into domestic drinking water.

Successful bathroom waterproofing requires sealing the floor slab, extending the membrane at least 300mm to 1m up the walls, and carefully collar-sealing all plumbing pipe penetrations and drainage outlets with flexible 2K waterproofing coatings before tiling.

Yes, Nirmana Constructons arranges reliable, prompt delivery of waterproofing chemicals, adhesives, sealants, and accessories to construction sites and residences across all districts of Sri Lanka.

You can reach our technical consultation team directly by calling +94 77 441 4279 / +94 76 008 3869 / +94 76 824 6432 or messaging us on WhatsApp at +94 76 824 6432. You are also warmly welcome to visit our showrooms in Kaduwela and Malabe.

Yes, absolutely. We provide 100% free, obligation-free consultation. You can discuss your leakage issue, structure type, and budget with us beforehand so you only buy what is genuinely necessary.

While spot treatment may temporarily patch visible cracks, water frequently travels through concrete capillaries and emerges away from the entry point. For guaranteed long-term protection, coating the entire slab area—with extra reinforcement at corners and parapet junctions—is the safest approach.

Yes, crack repair is a mandatory prerequisite. Waterproofing coatings are designed to prevent moisture penetration, not to act as structural gap fillers. Active and dormant cracks must be properly sealed with polymer repair mortars before membrane application.

Yes. After allowing the waterproofing membrane to cure fully (typically 3 to 7 days), tiles can be safely installed using high-grade, polymer-modified cementitious tile adhesive suitable for outdoor or wet area exposure.

Two-component (2K) systems combine a synthetic acrylic/polymer liquid with a specially formulated cementitious powder. The polymer provides superior flexibility and elongation, while the cementitious component delivers compressive strength and monolithic adhesion to concrete.

Never alter the mixing ratio! Adding extra water or thinning agents weakens the chemical bonds, drastically reduces elasticity, and causes premature cracking or delamination. Always adhere strictly to the ratio specified by the manufacturer.

For critical flat areas such as roof slabs, balconies, and bathrooms, conducting a 24 to 48-hour ponding test (retaining 25-50mm of standing water) is strongly recommended before tiling or screeding to verify 100% watertight integrity.

No. Waterproofing chemicals require adequate drying and curing time. Rain or excess standing moisture will wash away uncured acrylics or disrupt the hydration process. Always plan application during dry weather periods.

No. Substandard or cheap paints offer weak elasticity and quickly break down under tropical heat and monsoon rains, resulting in expensive demolition and re-treatment costs. At Nirmana Constructons, we provide premier branded chemicals at the highest market discounts, ensuring the best value without compromising quality.

No. Different areas face vastly different exposures. An exterior roof slab requires UV and thermal flexibility; a water tank requires potable water certification; an underground retaining wall requires negative pressure resistance. Each area requires an engineered system.

Yes. Simply provide us with the square meter or square feet measurements of your slab, bathroom, or wall, and our team will calculate the exact coverage, number of coats, and pack sizes needed, minimizing wastage and saving you money.

Yes. Exterior blind walls exposed to heavy driving rains can be sealed using high-build elastomeric waterproofing coatings that bridge hairline plaster cracks and resist fungal and algae growth.

Yes. Our exterior products—such as CEYAKRETE AQUASHIELD—are specifically formulated with UV inhibitors and weather-resistant elastomeric polymers engineered to withstand intense tropical sunlight and torrential monsoons.

Not necessarily. While you are always welcome at our Kaduwela and Malabe locations, you can easily receive comprehensive technical guidance, product recommendations, and material estimations over the phone or via WhatsApp with photos and videos.

With over 35 years of trusted experience, Nirmana Constructons is Sri Lanka's dedicated waterproofing knowledge partner. We do not just sell cans off the shelf—we offer genuine branded chemicals, 100% free technical consultation for you and your workers, unmatched market discounts, and prompt islandwide delivery.