Sika SikaLatex
Sika SikaLatex
SikaLatex® is a styrene butadiene rubber (SBR) emulsion used as a bonding agent and mortar admixture for cementitious materials. It increases adhesion, reduces shrinkage and cracking, and lowers permeability. Available in 1.2 kg, 4 kg, 18 kg, 20 kg pails and 200 kg drums. Supplied by Wahhing Waterproofing Materials.
SikaLatex® — Water Resistant Bonding Agent and Mortar Admixture
SikaLatex® is a synthetic styrene butadiene rubber emulsion used as an admixture for cementitious bonding bridges and high-quality site-mix mortars. When added to cement-sand mixes, it significantly improves bond strength, reduces shrinkage and cracking, increases abrasion resistance, and reduces permeability for enhanced waterproofing performance.
Key Features
- Increased adhesion to substrates
- Reduced shrinkage and cracking
- Increased abrasion resistance
- Reduced permeability
- Improved workability
- Easy to use on site
Applications
- Grouts and screeds
- Patch repair mortars
- Masonry mortars
- Renders
- Waterproof roof screeds
- External render enhancement
Why Choose SikaLatex?
- Trusted Brand: Sika is a global leader in construction chemicals with over 100 years of expertise
- Climate Suitable: Performs reliably in Hong Kong's hot, humid conditions
- Flexible Packaging: Available in 1.2 kg, 4 kg, 18 kg, 20 kg pails and 200 kg drums for any project size
- Specification Compliant: Widely approved for use in construction projects
Packaging
| Type | Size |
|---|---|
| Small Pail | 1.2 kg |
| Medium Pail | 4 kg |
| Large Pail | 18 kg |
| Large Pail | 20 kg |
| Drum | 200 kg |
Technical Specifications
| Property | Value |
|---|---|
| Chemical Base | Styrene Butadiene Emulsion |
| Appearance / Colour | White liquid |
| Density | ~1.0 kg/l |
| Solid Content | Approx. 47% |
| Total Chloride Ion Content | ≤ 0.1% |
| Shelf Life | 12 months (unopened, stored in dry cool conditions) |
Recommended Dosage and Mix Ratios
Bonding Coat
Mix 1 part SikaLatex® to 1 part fresh Portland cement to produce a stiff bonding slurry. Coverage: approx. 4–6 m²/kg of SikaLatex® (varies with surface profile).
Spatterdash
| Material | Mixing Ratio (by volume) |
|---|---|
| Cement : Sand | 1 : 2 |
| Water : SikaLatex® | ~2.5–4.0 : 1 |
Mortar Additive
| Material | Mix 1 — Render / Screed / Repair | Mix 2 — High Performance Repair | Mix 3 — Heavy Duty Floor Screed |
|---|---|---|---|
| Portland Cement (kg) | 50 | 50 | 50 |
| Sand (kg) | 125* | 125* | 75** |
| Aggregate (kg) | — | — | 75 (3–6 mm gravel) |
| SikaLatex® (kg) | 7 | 9 | 6 |
| Water (L) | Up to 12 | Up to 9 | 12–20 |
| Typical Yield | 0.09 m³ | 0.09 m³ | 0.1 m³ |
| Coverage | ~1.29 m²/kg/10 mm | ~1 m²/kg/10 mm | ~1.67 m²/kg/10 mm |
*Mix 1 & Mix 2: If thickness > 12 mm, add 25 kg extra sand.
**Mix 3: Semi-dry screeds > 25 mm require only 4 kg SikaLatex®.
Note: Keep water content as low as possible. Maximum thickness is 40 mm per layer.
Important Notes
- Never use pure SikaLatex® or SikaLatex®-water mix directly onto the substrate as a bonding bridge — always add cement and sand to the mix
- Substrate must be thoroughly clean, free from dust, loose material, oil, and contaminants
- For bonding bridge application, pre-wet the substrate for approx. 2 hours; keep surface wet but free of standing water
- Finish mortar topping with wood float or steel trowel; prevent rapid drying using polythene or curing compounds
- Store in original sealed packaging in dry, cool conditions away from direct sunlight, frost, and contamination
SikaLatex vs Other Bonding Agents Comparison
| Product | Brand | Type | Key Feature |
|---|---|---|---|
| SikaLatex | Sika | SBR Emulsion | Versatile bonding and mortar admixture |
| Ronafix | Sika Ronacrete | SBR Modified | Since 1969, high compressive strength |
| Nitobond SBR | Fosroc | SBR Latex | Industrial grade improvement |
| Planicrete Latex | Mapei | Synthetic Rubber Latex | Enhanced mechanical performance |
FAQ
What is SikaLatex used for?
SikaLatex is a styrene butadiene emulsion used as a bonding agent and mortar admixture. It is added to cement-sand mixes to improve adhesion, reduce shrinkage, increase abrasion resistance, and lower permeability. Common applications include renders, screeds, patch repair mortars, and masonry mortars.
How do I mix SikaLatex?
The mix ratio depends on the application. For bonding coats, mix 1 part SikaLatex to 1 part cement. For mortar, typically use 7–9 kg SikaLatex per 50 kg cement with sand and water. First mix SikaLatex with water to form a gauging solution, then slowly add the cement-sand mix while stirring until smooth and lump-free. Refer to the mix ratio table above for detailed proportions.
What packaging sizes are available?
SikaLatex is available in 1.2 kg, 4 kg, 18 kg, and 20 kg pails, as well as 200 kg drums — suitable for small domestic repairs through to large construction sites. Contact us via WhatsApp for pricing and availability.
