Description
Bostik Cementone SBR Strengthens & Waterproofs Mortar Mixes 25ltr
Bostik SBR is a specially modified Styrene Butadiene Co-polymer Latex designed for use with cement and mortar mixes. This high-performance liquid improves the strength, waterproofing, and abrasion resistance of renders, screeds, and mortar. Ideal for both interior and exterior applications, Bostik SBR serves as a powerful bonding agent and primer, particularly effective in demanding external environments.
Bostik SBR enhances the durability of construction materials by toughening, waterproofing, and increasing resistance to chemicals and abrasion. It is particularly beneficial for waterproof rendering, flooring screeds, and toppings, as well as for bonding renders and controlling suction. When used as directed, it ensures a high-quality, long-lasting finish for a wide range of construction projects.
Features:
- Improves strength, waterproofing, and abrasion resistance of mortar, screeds, and renders.
- Excellent bonding agent and primer, especially for external applications.
- Can be used in waterproof rendering, screeds, toppings, and bonding renders.
- Specially modified Styrene Butadiene Copolymer Latex for superior performance.
- Increases chemical and abrasion resistance for long-lasting results.
- Easy to use and mixes well with cement and mortar.
Technical Data:
- Brand – Bostik
- Range – Cementone
- Product Type – Waterproofing & Strengthening Admixture
- Colour – Milky White
- Size – 25ltr
- Specific Gravity – Approx. 1.0
- Composition – Modified Styrene Butadiene Copolymer Latex
- Application Temperature – +5°C to +40°C
Preparation:
- Shake well before use.
- Do not overmix or over-trowel mixes modified with Bostik SBR.
Application:
- Bonding slurry: For screeds, toppings, renders, and coatings.
- Mix 2 parts cement to 1 part Bostik SBR by volume to achieve a stiff, brushable consistency. Do not add water.
- Apply evenly to a dampened surface, ensuring a thickness of between 1mm and 2mm.
- Apply screed, topping, render, or coating while the slurry is tacky (this usually takes 20 to 40 minutes).
Cleaning:
- Clean tools and equipment immediately after use with water.






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