Product Overview

Fosroc Nitobond SBR is a styrene-butadiene rubber (SBR) synthetic latex emulsion supplied as a ready-to-use, milky-white liquid. It has multiple applications in concrete repair and construction: as a bonding slurry coat (mixed with cement and applied to existing concrete before repair mortar), as an admixture in cement-sand mortars and screeds to improve adhesion, flexibility, and waterproofing, and as a waterproofing additive in cement-sand slurry coats applied directly as a surface waterproofing layer. Its versatility makes it a staple construction chemical used at almost every stage of concrete repair and renovation work.

Typical Applications

• Bonding slurry coat for concrete repair work — applied to prepared concrete before mortar
• Polymer admixture in cement-sand screeds and floor toppings to improve adhesion and flexibility
• Waterproof cement-sand slurry coat for bathrooms, basements, and damp areas
• Mortar admixture for tile bedding to improve bond and reduce shrinkage cracking
• Bond coat under plaster and render on low-suction or smooth concrete surfaces
• Polymer-modified mortar production for improved durability and reduced permeability
• Concrete joint filler and crack sealing slurry compound

Key Advantages

• Versatile Multi-Use Product: Nitobond SBR is used in bonding slurries, modified mortars, waterproof slurry coats, and screed admixtures — a single product that covers a wide range of repair and finishing applications
• Improved Adhesion: SBR polymer chains bridge the old-concrete/repair-mortar interface, creating a mechanical and chemical bond significantly stronger than unmodified cementitious contact
• Flexible Film Formation: Unlike rigid bonding agents, SBR forms a flexible polymer film that accommodates minor movement and thermal cycling without cracking — especially valuable in thin screeds and waterproofing coats
• Waterproofing Action: When mixed in the correct ratio as a cement slurry, Nitobond SBR fills surface pores and capillaries in concrete and masonry, providing effective waterproofing without a separate membrane