Product Overview

Dr. Fixit NB Coat is a solvent-based, rubberised bitumen waterproofing compound manufactured by Pidilite Industries for the waterproofing of below-grade concrete and masonry building elements including foundations, basement walls, retaining structures, and buried service ducts. It is applied cold by brush or roller to the external face of the concrete or masonry substrate below ground level before backfilling, providing a tough, black, flexible coating that resists groundwater penetration and soil moisture migration into the building structure. The rubber modification of the bitumen binder gives NB Coat a significantly improved flexibility and elongation at break compared to plain oxidised bitumen coatings, enabling the cured coating to accommodate minor substrate movement and hairline cracking without splitting and creating water paths. This rubber-modified flexibility maintains the waterproof integrity of the coating over the temperature range experienced by buried below-grade elements — from the cold January ground temperatures in northern India to the much warmer soil temperatures at shallow depths during summer, where plain bitumen coatings can soften and flow down vertical walls. NB Coat is a widely used, economical, and effective below-grade waterproofing solution for standard residential and commercial building foundations across India. Its cold-applied, brush-on application format makes it accessible to general contractors and mason teams without specialist waterproofing equipment or skills. After application and curing, NB Coat must be protected from physical damage during backfilling by a drainage board, protection sheet, or lean concrete layer, as the relatively soft bitumen coating can be damaged by sharp stone aggregate during backfill compaction. Space Arc Engineering supplies Dr. Fixit NB Coat for residential and commercial building foundation waterproofing, basement wall treatment, and below-grade structure protection throughout Delhi NCR, Ghaziabad, and Uttar Pradesh.

Applications

• Foundation wall and strip footing external face waterproofing — below finished ground level
• Basement retaining wall external face coating before backfilling
• Buried service duct, cable trench, and utility vault waterproofing
• Pile cap and ground beam external waterproofing below ground
• Plinth beam and plinth wall damp-proof course treatment
• Buried culvert and stormwater pipe joint waterproofing

Key Advantages

• Cold-applied by brush or roller — no heating or torching, accessible to general contractors
• Rubber-modified bitumen — flexible coating accommodates minor movement and hairline cracking
• Good adhesion to concrete and masonry without primer on most substrates
• Black colour — easy to verify uniform coverage during application, no holidays
• Economical below-grade waterproofing solution for standard residential and commercial construction
• Effective moisture and groundwater barrier for normal soil conditions