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  • Berger Dampstop Duo 20L High-Performance Waterproof Primer - berger dampstop duo waterproofing primer 20 ltr - Buy Online at JEM HARDWARE MART

Berger Dampstop Duo 20L High-Performance Waterproof Primer

Dampstop Duo is ideal for both exterior and interior wall applications, providing protection against dampness and water pressure up to 4 bar positive and 2 bar negative. It is perfect for surfaces prone to salt leaching and moisture infiltration.


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Berger Dampstop Duo Waterproofing Primer 20 Ltr is a high-performance coating designed to protect both interior and exterior walls from dampness, water seepage and salt leaching. Ideal for bathrooms, basements, terraces and all moisture-prone areas, it withstands up to 4 bar positive and 2 bar negative water pressure with ease. This advanced waterproofing primer improves adhesion of top coats while preventing peeling, blistering and efflorescence. Homeowners, contractors and painters rely on it for reliable, long-term wall protection in demanding conditions. It is especially useful before painting or tiling where strong, lasting waterproofing is essential. Available near No 36 Tana street Purasawalkam opp apollo medicals for convenient purchase and professional-grade results every time.

Withstands 4 bar positive and 2 bar negative pressure
Protects walls from dampness and water seepage
Resists salt leaching and efflorescence damage
Improves adhesion of subsequent paints and coatings
Suitable for both interior and exterior wall surfaces
Helps prevent peeling, blistering and paint failure

Clean the surface thoroughly to remove dust, loose particles, oil or algae. Repair cracks and holes with suitable filler and allow to dry. Mix Berger Dampstop Duo Waterproofing Primer 20 Ltr as per label directions. Apply evenly with brush or roller in recommended coats. Allow specified drying time between coats before applying topcoat or paint.

Berger Dampstop Duo Waterproofing Primer 20 Ltr is used to protect interior and exterior walls from dampness, seepage and salt leaching. It forms a strong barrier that withstands up to 4 bar positive and 2 bar negative water pressure, helping prevent peeling paint, blistering and surface damage in moisture-prone areas.

Yes, Berger Dampstop Duo is specially formulated for both interior and exterior walls. It can be applied in bathrooms, basements, balconies, terraces and outer walls exposed to rain or moisture. This waterproofing primer enhances durability of paint systems and helps keep surfaces dry, stable and resistant to damp-related damage.

Berger Dampstop Duo Waterproofing Primer 20 Ltr is ideal for surfaces affected by salt leaching and efflorescence. It creates a protective barrier that reduces water movement through the wall, limiting salt migration to the surface. This helps prevent white salt deposits and improves the long-term performance of paints and finishes applied over it.

Generally, two coats of Berger Dampstop Duo are recommended for effective waterproofing, though exact coverage depends on surface condition and porosity. The first coat penetrates and seals the substrate, while the second builds additional protection. Always follow the manufacturer’s instructions on the pack for mixing ratio, coverage and drying time between coats.

Yes, you can paint over Berger Dampstop Duo once it is fully dry and cured. The primer improves adhesion of subsequent coatings, helping the paint bond better and last longer. Ensure recommended drying time is followed, then apply compatible exterior or interior topcoat paints as specified by Berger for best results.
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