Dr. Fixit Brush Bond
Brush-Applied Elastomeric Bituminous Waterproofing Membrane for Below-Grade and Roof Structures
Authorized Project Distributor — Dr. Fixit by Pidilite | Space Arc Engineering, Ghaziabad
Product Overview
Dr. Fixit Brush Bond is a solvent-based elastomeric bitumen-rubber compound manufactured by Pidilite Industries for cold brush or roller application as a waterproofing membrane on concrete and masonry substrates in below-grade and roofing applications. The product is based on oxidized bitumen modified with synthetic rubber polymers (typically SBR or neoprene) dissolved or dispersed in a hydrocarbon solvent carrier, which provides sufficient flowability for brush, roller, or spray application at ambient temperature. As the solvent evaporates after application, the bitumen-rubber compound consolidates into a thick, seamless, elastomeric membrane adhered directly to the concrete or masonry substrate without the need for heat application. Dr. Fixit Brush Bond is primarily used as a cost-effective, site-applied waterproofing membrane for below-grade concrete elements — foundation walls, retaining walls, basement walls, and the underside of raft slabs — where the membrane will be protected from direct sunlight and physical damage by earth backfill, drainage composite, or protection boards. The below-grade application environment suits bituminous coatings well: UV degradation (a primary weakness of standard oxidized bitumen) is not a concern when the membrane is buried, and the cold flexible temperatures of the subsoil environment maintain the elastomeric flexibility of the rubber-modified bitumen without the flow and softening risk of unmodified bitumen in hot surface applications. The applied membrane is typically 1 to 2 mm thick (2 to 3 coats) and provides good resistance to hydrostatic water pressure, soil moisture, and root penetration (relevant for below-podium and landscaped basement applications). Dr. Fixit Brush Bond is widely used by basement and foundation waterproofing contractors in India as a practical and cost-effective below-grade membrane where torch-on sheet membranes are too expensive or where irregular substrate geometry makes sheet application difficult. Space Arc Engineering supplies Dr. Fixit Brush Bond for foundation waterproofing, basement construction, and structural waterproofing projects throughout Delhi NCR, Ghaziabad, and Uttar Pradesh.
Applications
- Foundation and raft slab base waterproofing — applied to underside before concrete casting on blinding
- Basement and retaining wall external face — below-grade negative-side waterproofing membrane
- Lift pit and underground utility shaft wall waterproofing — below-grade wall exterior treatment
- Flat roof and terrace base coat — first coat bituminous membrane before fibre reinforcement and topcoat
- Pipe trench and culvert exterior waterproofing — brush-applied to buried precast or cast-in-situ elements
- Bridge pier and abutment below-grade waterproofing — below ground level waterproofing of structural elements
Key Advantages
- Cold-applied — no torch or heat equipment needed, safe application at all site conditions
- Elastomeric rubber-modified — flexible membrane accommodates thermal and structural movement
- Seamless — brush or roller applied with no laps or seams that can delaminate under pressure
- Good adhesion to concrete and masonry — bonds directly without separate primer in most applications
- Cost-effective below-grade membrane — economical alternative to torch-on sheet for buried walls
- Thick coating — 1 to 2 mm DFT in 2 to 3 coats provides meaningful hydrostatic resistance
Technical Data
| Type | Solvent-based elastomeric bitumen-rubber compound — cold-applied brush membrane |
| Base | Oxidized bitumen modified with synthetic rubber (SBR or neoprene) in solvent carrier |
| Application Method | Brush, roller, or airless spray — multiple coats to achieve specified DFT |
| Dry Film Thickness per Coat | 0.4 to 0.6 mm — two to three coats to achieve 1.0 to 1.5 mm total system DFT |
| Flexibility at Low Temperature | Passes mandrel bend at minus 5 degrees C — adequate for Indian sub-soil temperatures |
| Solvent Content | Approximately 40 to 50 percent — good ventilation required during application in enclosed spaces |
Get a Quote
+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad
Frequently Asked Questions
When should a contractor choose Dr. Fixit Brush Bond versus a torch-on APP bitumen sheet membrane for waterproofing a new RCC basement wall, and what are the practical limitations of Brush Bond in this application?
Both Dr. Fixit Brush Bond (cold-applied elastomeric bituminous coating) and APP torch-on bitumen sheet membrane systems are viable specifications for RCC basement wall waterproofing, and the choice between them depends on project scale, budget, substrate geometry, labour availability, and performance requirements. Dr. Fixit Brush Bond is the preferred choice in the following situations. Complex geometry: Basement walls with numerous pipe penetrations, corners, step footings, sump pits, and irregular projections are difficult and costly to waterproof with sheet membranes, as each penetration and internal corner requires custom cut shapes and lapped details that are time-consuming and prone to defects. Brush Bond can be applied around all these details without cutting and overlapping. Budget constraint: For small residential basements and individual house foundations, the material cost of Brush Bond is typically 30 to 50 percent lower than equivalent-area torch-on sheet membrane, making it the preferred choice where detailed specification requirements are relaxed. Limited contractor skill: Torch-on sheet membrane application requires trained waterproofing mechanics with LPG torch equipment and experience in lapping, detailing, and quality control. Brush Bond application requires only brushes, rollers, and basic supervision, making it accessible to general civil contractors without specialist waterproofing training. Occupied or fire-sensitive buildings: Torch application near existing structures, combustible materials, or in enclosed basements is a fire and safety risk. Brush Bond eliminates the torch and associated fire risk entirely. Practical limitations of Brush Bond versus torch-on sheet membrane for basement walls: Thickness: Brush Bond applied at 2 to 3 coats achieves 1.0 to 1.5 mm total DFT — significantly thinner than a 3 to 4 mm thick APP torch-on sheet membrane. For high hydrostatic pressure applications (basement below 3 to 4 metres water table depth), the thicker APP sheet provides superior pressure resistance. Reinforcement: Standard Brush Bond has no fabric reinforcement — it relies entirely on the adhesion and thickness of the applied coating. Torch-on sheet membranes have a polyester or glass fibre carrier reinforcement that provides tensile strength across cracks and construction joints. For basements with significant structural cracking risk, the reinforced sheet membrane is superior. UV exposure: Brush Bond must not be left exposed to sunlight for more than 48 to 72 hours before backfilling, as the solvent-based bitumen oxidizes rapidly under UV and loses flexibility. Sheet membranes can tolerate longer UV exposure (though protection is still recommended). For large basement projects where construction programme requires phased backfilling over weeks, the UV sensitivity of Brush Bond requires careful planning of application and backfill sequencing.
Source Dr. Fixit Brush Bond for Your Project
Space Arc Engineering is an Authorized Project Distributor for Dr. Fixit by Pidilite Industries serving Delhi NCR, Ghaziabad, Noida and Uttar Pradesh.
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