Larsen SBR Bond (Larcem 25) Polymer Bonding Agent & Admixture | SBR Latex for Mortars, Screeds & Renders
Larsen SBR Bond (Larcem 25) Polymer Bonding Agent & Admixture | SBR Latex for Mortars, Screeds & Renders
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Larsen SBR Bond (Larcem 25) is a premium synthetic rubber polymer emulsion designed to significantly enhance the performance of cement-based mortars, screeds, renders, and repair compounds. Used as both a bonding agent and admixture, this versatile SBR latex improves strength, durability, flexibility, and water resistance in a wide range of construction and refurbishment applications.
When mixed with cement, SBR Bond produces a highly effective bonding slurry that promotes excellent adhesion between existing substrates and new screeds, renders, or repair mortars. As an admixture, it enhances the physical properties of cementitious mixes, allowing the production of high-strength screeds, thin-section screeds, waterproof mortars, patch repairs, and durable rendering systems.
The advanced polymer formulation improves flexural and tensile strength while increasing abrasion and chemical resistance. It also reduces shrinkage and water permeability, helping create more durable and long-lasting construction solutions. Being non-corrosive to steel, Larsen SBR Bond is suitable for use in reinforced concrete repairs and structural applications.
Ideal for contractors, builders, flooring specialists, and repair professionals, Larsen SBR Bond delivers reliable performance across domestic, commercial, industrial, and civil engineering projects.
Key Features
- High-performance synthetic rubber polymer emulsion
- Improves adhesion between substrates and cementitious materials
- Increases flexural strength
- Enhances tensile strength
- Improves abrasion resistance
- Improves chemical resistance
- Reduces shrinkage and cracking
- Lowers water permeability
- Suitable for waterproof mortar systems
- Non-corrosive to steel reinforcement
- Ideal for screeds, renders, repairs and bonding slurries
Specifications
Specifications
General Information
Product Name: Larsen SBR Bond (Larcem 25)
Brand: Larsen Building Products
Product Type: Synthetic rubber polymer emulsion (SBR latex)
Alternative Name: Larcem 25
Suitable Applications
- Bonding grouts
- Floor screeds
- Thin-section screeds
- Cement renders
- Patch repairs
- Concrete repairs
- Waterproof mortars
- Structural repair mortars
- Industrial flooring
- General construction projects
Performance Benefits
- Improves flexural strength
- Improves tensile strength
- Improves abrasion resistance
- Improves chemical resistance
- Reduces shrinkage
- Reduces water permeability
- Enhances adhesion
- Increases durability
- Non-corrosive to steel
Usage Methods
As a Bonding Grout
- Mixed with Ordinary Portland Cement (OPC)
- Promotes strong adhesion between old and new concrete, screeds, or renders
- Suitable for floor and wall applications
As an Admixture
- Added directly to cementitious mixes
- Improves mechanical and durability properties
- Suitable for waterproof and high-performance mortars
Coverage
Bonding Grout
- When diluted 1:2 with OPC, sufficient grout is produced to cover approximately 4m²
Admixture Dosage
- Typical dosage rate: 40–100 litres per m³ depending on application requirements
Packaging
- 5 Litre pack
- 25 Litre pack
Typical Uses
- Bonding new screeds to concrete
- Polymer-modified render systems
- Waterproof cementitious coatings
- Industrial floor repairs
- Structural concrete repairs
- Thin-section screeds
- Patch repair mortars
- External rendering projects
- Civil engineering and infrastructure works
Storage & Handling
- Store in original sealed containers
- Protect from frost
- Keep in dry conditions away from direct sunlight
- Use in accordance with technical application guidelines for best results
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