Sika SikaBond SBR + Waterproof Bonding Agent 5L 443839 for Concrete and Brickwork (SIKASBR5)

Sika SikaBond SBR + Waterproof Bonding Agent 5 Litre

Ref: SIKASBR5 | MPN: 892731 | Barcode: 5055492700476

This multi-purpose styrene butadiene rubber emulsion enhances the performance of cementitious mixes by improving adhesion and workability, transforming ordinary mortars into durable, water-resistant solutions.

Who This Product Is For

This bonding agent is designed for professional builders and contractors working on construction, repair, and waterproofing projects. It also suits serious home improvement users undertaking substantial renovation work.

The product is appropriate for tasks requiring enhanced mortar performance, including external rendering, screeding, concrete repairs, and tile fixing where water resistance and improved adhesion are needed.

Main Features

• Enhanced Adhesion: Improves bond strength for long-lasting results on various surfaces.
• Shrinkage Reduction: Minimises cracking and movement during curing for a more stable finish.
• Improved Waterproofing: Forms a barrier against moisture, making it suitable for external and damp-prone areas.
• Freeze/Thaw Resistance: Maintains integrity in fluctuating temperatures, giving durability in cold climates.
• Abrasion Resistance: Adds robustness to surfaces exposed to wear and tear, extending their lifespan.

Main Benefits

• Boosts the durability of cementitious materials, reducing maintenance needs.
• Improves mortar workability and ease of application.
• Offers flexible uses across a range of construction, repair, and waterproofing tasks.
• Provides reassurance with its ability to withstand harsh environmental conditions.

Practical Applications

This bonding agent is well-suited to numerous tasks, including:

• Creating water-resistant external renders and screeds for outdoor surfaces.
• Improving the strength and adhesion of tile fixing and brick slip mortars.
• Repairing concrete structures by enhancing durability and reducing shrinkage.
• Protecting surfaces from oil, chemical spills, and abrasive forces.

For applying mortar neatly into joints, use a mortar pointing gun.

Its flexible design supports application in both residential and industrial projects, helping to deliver consistent results every time.

How This Fits Into a Typical Job

This bonding agent is typically used during the preparation and application phases of cementitious work. It serves as a primer for surfaces before mortar application, as an additive mixed directly into mortar mixes to enhance their properties, or as a bonding slurry applied between existing and new concrete layers.

The product integrates into workflows where water resistance, improved adhesion, or reduced shrinkage are required. It is applied before or during mortar placement, then allowed to cure as part of the overall construction or repair process.

How to Use

1. Surface Preparation:
   • Make sure all surfaces are clean, dry, and free from dust, grease, and loose material. For porous surfaces, thorough cleaning is essential.
2. Mixing Ratios:
   • For priming: Blend 1 part SBR with 3 parts water.
   • As a bonding agent: Mix equal parts SBR and Portland cement to create a smooth paste.
   • For mortar admixture: Combine 5-7 litres of SBR with 25kg of cement, adjusting for your specific application.
3. Application:
   • Use a brush, trowel, or roller to apply the mixture evenly. For optimal results, apply in thin coats and allow each layer to cure before adding the next.
4. Curing:
   • Allow adequate drying time between coats, depending on temperature and humidity levels.
5. Cleaning Tools:
   • Clean equipment immediately after use with water to avoid material hardening.

When using bonded mortars or resin-based grouts for tile fixing, a mixing nozzle can help achieve a consistent finish.

Specifications

• Product Type: Styrene Butadiene Rubber emulsion bonding agent
• Pack Size: 5 litre container
• Formulation: Water-based
• Primary Functions: Adhesion enhancement, waterproofing, shrinkage reduction
• Compatibility: Cementitious mixes including mortars, renders, screeds, and concrete
• Resistance Properties: Freeze/thaw, abrasion, water penetration

Storage and Maintenance Tips

• Store in a cool, dry place, away from direct sunlight or frost.
• Keep the container sealed tightly to maintain product quality.
• Inspect the product periodically to check it remains free of contamination.

Order the Sika SikaBond SBR today to achieve high-performance results on your next project. Whether you’re repairing concrete, waterproofing screeds, or improving mortars, this product gives consistent, professional results.

• Specification

  Weight	5.6 kg
  Reference Code	892731
  Size	5 litre
  Manufacturer	Sika
  Type	SBR External Grade Water-proofer Bonding Agent Mortar Admixture
  Reference Code sika	443839
  Range	Sikabond

• Product FAQs

  Q: Can this product be used for tile fixing?
  A: Yes, it works effectively as an admixture for tile fixing mortars, improving adhesion and ensuring a secure bond.
  Q: What is the recommended dilution ratio for priming surfaces?
  A: For priming, mix 1 part of the product with 3 parts water. This creates an effective solution for sealing porous surfaces before applying further coatings.
  Q: Is this product suitable for exterior use?
  A: Absolutely. It enhances waterproofing and durability, making it ideal for external renders, screeds, and other outdoor applications.
  Q: How does it improve resistance to freeze/thaw cycles?
  A: The emulsion’s properties reduce water absorption and strengthen the mix, preventing damage caused by freezing and thawing cycles over time.
  Q: Can it be used as a standalone waterproofing agent?
  A: While it significantly improves waterproofing when mixed with cementitious materials, it is not intended as a standalone waterproof coating. Pair it with appropriate materials for best results.
  Q: What types of surfaces can benefit from this product?
  A: It performs well on concrete, masonry, tiles, and other cementitious surfaces, offering enhanced strength and resilience.

• Downloads

  Sika Sikabond SBR Safety Data Sheet
  Sika Sikabond SBR Technical Data Sheet