Home improvement bonding agent Sika SikaBond SBR+ Bonding Agent improves adhesion and waterproofing for mortars and cementitious tile adhesives. Professional tilers and ambitious DIYers gain confidence from stronger, more durable bonds on exterior and damp substrates. Is a polymer-modified admixture a better choice than traditional PVA for your next project?
⚡ At a Glance
- • Adhesion Performance: High-strength adhesion to dense concrete, steel and tiles; improves mortar strength
- • Best for: Professional builders, tilers and ambitious DIYers working on exterior and damp substrates
- • Not ideal for: Users preferring PVA for interior, dry-only applications
SBR polymer acts as a flexibiliser and mortar admixture to boost bond strength. Water-resistant formulation improves resistance to salt, chemicals and frost for exterior use.
Flexible Bonding for Timber and Asphalt Floors – with SBR polymer flexibiliser
Styrene-butadiene rubber (SBR) modifies the cement matrix, increasing flexibility and reducing brittleness so adhesive beds can move with substrates. The polymer film forms within the mortar to absorb stresses from substrate movement.
Tiles and repairs stay bonded on wooden and asphalt floors without premature cracking or debonding, making renovations on tricky substrates more reliable.
Waterproof Performance for Exterior Use – thanks to water-resistant formulation
Polymeric chemistry resists breakdown in wet conditions, unlike PVA, reducing water absorption and limiting moisture pathways through the mortar. The formulation also lowers permeability to salts and chemicals.
Suitable for exterior and damp-area applications, delivering a smoother, waterproof finish that stands up to wet weather and exposure.
Stronger, More Durable Mortar – with reduced water-to-cement ratio and high-strength properties
Reducing the water-to-cement ratio produces a denser cement matrix for improved compressive strength, while polymer modification enhances adhesion to dense substrates and improves frost and chemical resistance.
Mortars and repairs cure harder and last longer, making joints and patch repairs less prone to salt damage and freeze-thaw deterioration.
✨ The 4 Key Reasons for Sika SikaBond SBR+ Bonding Agent
- Water-resistant formula - Ensures reliable exterior use and longevity in damp conditions
- Flexibiliser action - Allows tile adhesives to flex on wooden and asphalt floors
- Reduced water-to-cement ratio - Creates denser mortar for higher strength and faster curing
- High resistance to salts and frost - Protects repairs in exposed locations facing freeze-thaw cycles
📋 Technical Details at a Glance
- Product type: General purpose bonding agent and mortar admixture
- Brand: Sika
- Form: Liquid admixture
- Colour: Clear
- Capacity: Available in 5-litre and 25-litre jerry cans
❓ Frequently Asked Questions
Q: Is Sika SikaBond SBR+ suitable for exterior use?
A: Yes. The formulation is water resistant and described as suitable for exterior applications, unlike PVA.
Q: Can Sika SikaBond SBR+ be used with tile adhesives and mortar?
A: Yes. It is suitable as a flexibiliser for cementitious-based tile adhesives and as a general purpose admixture for mortars.
Q: Which substrates will Sika SikaBond SBR+ improve adhesion to?
A: Enhances adhesion to dense concrete, steel and tiles, and supports use on wooden and asphalt flooring when mixed into cementitious tile adhesives.
🏆 Our Verdict
Suitable for professional builders, tilers and serious DIYers who need water-resistant, flexible bonding on difficult substrates. The SBR polymer formulation and broad substrate compatibility make it especially useful for exterior and damp-area repairs. Available in practical 5-litre and 25-litre options, the durable waterproof finish delivers long-term value for medium and large projects.
