New: Kerala distributor meet recap
Read
ROOFBOND SBR 401
- Bond new concrete to old
- Repair mortar for plaster
- Waterproofing slurry coat
- Heavy-duty floor screeds
ROOFBOND SBR is a high-performance Styrene Butadiene Rubber (SBR) latex polymer bonding agent for high-quality cementitious repairs and structural restoration. A multifunctional, single-component liquid for both internal and external surfaces, it also provides high-performance waterproofing — a universal repair product for concrete and masonry works.
Specifications
Figures are controlled laboratory results. Actual site performance varies with substrate, temperature, humidity, application method and workmanship — please confirm the current product datasheet before specification.
Where to use ROOFBOND SBR 401: SBR latex bonding agent for repair work
ROOFBOND SBR 401 is an SBR latex bonding agent, a single-component white emulsion of Styrene Butadiene Rubber polymer. It is applied as a bond coat mixed with cement, or added to the mortar mix itself, for cementitious repairs on internal and external surfaces. It also gives waterproofing, so one product covers most concrete and masonry repair jobs.
Bond Coat for Old-to-New Concrete
Mixed 1:1 with cement and applied on the prepared old surface.
Waterproofing Slurry
Used as a waterproofing slurry on internal and external surfaces.
Repair Mortar & Masonry Plaster
Added to repair mortar and plaster mixes for masonry.
Structural Repairs
Typically 10 litres per 50 kg bag of cement for structural repairs.
Heavy-Duty Floor Screeds
Dosed at 5–9 litres per 50 kg bag of cement.
Tile, Granite, Marble & Stone Joint Filling
Used in the cement mix for filling tile and stone joints.
If you are asking how to bond new concrete to old, use it as a bond coat in equal parts with cement. That covers 40–65 sq.ft per litre per coat, depending on the substrate. As an SBR polymer for repair mortar in a 1:3 mix with 10 litres per 50 kg bag of cement, it reaches 63 MPa compressive, 9.0 MPa flexural and 3.5 MPa tensile strength at 28 days. Solid content is 42%. Place the repair mortar while the bond coat is still tacky.
Armstrong Chemicals supplies ROOFBOND SBR 401 to sites across Telangana, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu, including Hyderabad, Vijayawada, Bengaluru, Kochi and Chennai.
One Admixture, Five Engineered Mix Designs
An SBR latex polymer bonding agent that turns ordinary cement mortar into a 63 MPa structural repair material — with documented mix ratios for bond coats, waterproofing slurry, repair mortar, structural repairs, and heavy-duty floor screeds.
Get a QuoteWhy Plain Cement Mortar Fails in Repairs
Unmodified cement mortar bonds poorly to old concrete, stays permeable to water and chemicals, and lacks the tensile and flexural strength repair work demands.
The ROOFBOND SBR Advantage
An SBR latex admixture that boosts bond strength, reduces permeability, and lifts mechanical properties to 63 MPa compressive / 9.0 MPa flexural — turning ordinary mortar into a structural repair material.
Engineered for Strength
Delivers 63 MPa compressive, 9.0 MPa flexural and 3.5 MPa tensile strength at 28 days in a 1:3 repair mortar — increased dosage and reduced water further improve mechanical performance.
One Admixture, Five Mix Designs
From bond coats to heavy-duty floor screeds, this brochure documents five distinct, ready-to-use mix ratios for site teams — no guesswork on proportions.
Trusted on India's Toughest Infrastructure
Five Documented Recipes, From the Brochure TDS
As a Bond Coat
- •Apply to a clean, well-prepared surface.
- •Place fresh concrete/mortar immediately while the bond coat is still wet.
Engineered for Repair, Built for Strength
A bonding agent that turns site-mixed mortar into a structural repair material.
Engineered Mechanical Strength
63 MPa compressive, 9.0 MPa flexural, and 3.5 MPa tensile strength at 28 days in a standard repair mortar mix.
Reduces Permeability & Chemical Attack
Lowers mortar permeability, reducing the rate of attack from aggressive chemicals, acid gases and water.
Non-Toxic & Cement-Compatible
Eco-friendly, non-toxic, and compatible with all types of cement — easy to gauge on site to the job at hand.
Five Engineered Mix Designs
One admixture for bond coats, waterproofing slurry, repair mortar, structural repairs, and heavy-duty floor screeds.
Applicable Areas
Packing & Storage
Supplied in 1, 5, 20, 30 & 210 Litre barrels. Shelf life of 24 months from manufacture date.
Health & Safety Precautions
Avoid skin and eye contact; do not swallow. Wear protective gloves and goggles. If skin contact occurs, wash with soap and water. For eye contact, rinse thoroughly with clean water and seek medical advice. If swallowed, seek medical attention immediately — do not induce vomiting. Non-flammable.
Cleaning of Tools
Tools and equipment should be cleaned with water immediately after use.
Product Brochure
Download Technical Datasheet
Full specifications, application systems, layering guides, and coverage tables.
Frequently Asked Questions
Ready to protect your structure?
Request a quote and your nearest Armstrong distributor will contact you directly.
You may also need
ROOFBOND EP is a two-component, solvent-free epoxy resin bonding agent for producing excellent bond strength between old and new concrete and cementitious surfaces. Brush-applied in a thin film, it cures to a high-strength epoxy bond layer with an open overlay window of 2–3 hours at 30°C and 5–6 hours at 20°C. It delivers 52 N/mm² compressive, 36 N/mm² flexural and 25 N/mm² tensile strength. Suitable for both damp and dry surfaces. Approved and extensively used across CPWD, PWDs, APGENCO and government infrastructure projects.
View DetailsStops water flow, sets in 30 seconds. For underwater plugging to stop leakage and seepage.
View DetailsAcrylic Emulsion Modified concrete Bonding Agent and Admixture. High quality modifier and multi-functional product providing highly durable and impermeable cementitious concrete and mortar. Excellent weather resistance for structural repairs and restoration. Can be used as bond coat (1:1 with cement) or admixture.
View Details