Yes. JSW’s iBlok Waterstop Roof Coat or Base Coat can be applied over properly prepared, previously painted surfaces. Surfaces must be cleaned, free of loose material or efflorescence. A sound existing coat allows for excellent adhesion and performance of the waterproofing layer when applied as per the instructions.

JSW recommends at least two coats of its iBlok waterproof base coat, followed by a finishing waterproof topcoat. This three-layered approach comprises a prime coat and a roof coat, and a 3K crystalline system, ensuring optimal crack-bridging, water resistance, and long-term durability when applied correctly.

Look for visible damp patches, salt stains or efflorescence, bubbling or peeling paint, mould or mildew spots, weak plaster, or water seepage on ceilings and walls. These symptoms often indicate moisture ingress due to failed waterproofing or cracks needing repair before painting.

Absolutely. Waterproofing with JSW iBlok products blocks moisture penetration, preventing efflorescence and dampness that cause paint layers to bubble or peel. When applied over a clean, prepared surface, these coatings maintain the integrity and adhesion of the paint for years to come.

If walls or ceilings show dampness, mould, salt buildup, visible cracks, leaking in bathrooms or balconies, or unstable plaster, it’s time to waterproof. Also, if your roof or parapet walls feel damp after rain or you notice internal humidity, proactive waterproofing is advisable.

JSW’s iBlok Roof Coat offers a 10-year waterproofing warranty when applied as prescribed and maintained, subject to PIS guidelines. Interior base coats and crystalline 3K systems typically deliver 3 to 8 years of endurance, depending on exposure and surface preparation.

JSW offers a wide range of waterproofing solutions to tackle different needs. These include iBlok Waterstop 3K, a crystalline waterproofing system ideal for deep protection, iBlok Base Coat, a crack-bridging primer suitable for both interior and exterior applications, iBlok Roof Coat, a fibre-reinforced elastomeric waterproofing layer for roofs, and iBlok Crack Fix, a ready-to-use paste designed to seal cracks up to 3 mm. Together, these products provide comprehensive solutions to prevent water ingress and maintain the durability of your home surfaces.

Apply waterproofing during dry weather with no rainfall forecast for several days. This ensures proper curing. Avoid applying it during rainy or humid monsoon periods. The ideal time is post-monsoon or early dry season pre-monsoon, when surfaces can be fully dried and work completed without moisture interruption.

JSW iBlok systems are water-based and low-VOC, emitting minimal odours. Compared to solvent-based alternatives, they cause little inconvenience during application. A mild smell may occur briefly but dissipates quickly, making them homeowner- and environment-friendly.

Drying depends on the product and conditions. Typically, each coat of JSW iBlok Base or Roof Coat dries in 4–6 hours under dry conditions. Full curing of multiple coats may require up to 2–3 days before testing or exposure to rain. Proper ventilation speeds up curing. sach