Sika SikaLatex Power
A high-performance SBR latex polymer that turns ordinary site mortar into a waterproof, tough, well-bonded system for repairs, renders and water-retaining structures.
What is it?
A styrene-butadiene rubber (SBR) latex emulsion that is added to the gauging water of cement mortar, concrete or grout to improve waterproofing, adhesion and flexibility.
Where is it used?
Roof slabs, sunken slabs, basements, water tanks, retaining walls, sunshades, plus bonding coats and polymer-modified repair mortars.
Why use it?
One product covers seven site jobs — it makes mortar water-resistant, boosts bond strength above 1.5 N/mm2, and cuts shrinkage cracking without exotic equipment.
How is it applied?
Dilute with water at the ratio for your job, gauge cement or cement-sand into it to a lump-free mix, and apply by brush, trowel or as a mortar within the working time.
About Sika SikaLatex Power
SikaLatex Power is Sika’s higher-solids SBR latex, built for the wet, humid and continuously-damp conditions that defeat plain cement mortar. It is a milky-white liquid emulsion that stays fully soluble in water, so it goes straight into the gauging water rather than needing a separate priming step or special plant. Once the polymer film cures inside the cement matrix, it bridges micro-cracks, blocks water paths and knits new mortar to old concrete — which is why the same drum handles waterproof coatings, bonding slurries, repair mortars, screeds and injection grouts on a single site.
For engineers and contractors across Delhi NCR and the rest of India, its appeal is versatility with predictable numbers. Sika publishes a clear consumption table for each job, the product carries an 18-month shelf life, and the cured mortar develops a tensile adhesion strength of at least 1.5 N/mm2 to EN 1542 with concrete failure — meaning the bond outlasts the parent concrete. Space Arc Engineering supplies it as an authorised Sika distributor and applicator, with dosage guidance matched to the actual substrate and exposure on your project.
The technical insight
The waterproofing and bonding action is physical, not chemical set-acceleration. As the SBR emulsion dries alongside cement hydration, the polymer particles coalesce into a continuous, flexible film that lines the capillary pores of the hardened mortar. That film does two things at once: it discourages water and dissolved salts from migrating through the pore network (which is what curbs leaching and saltpetre efflorescence), and it adds tensile toughness so the mortar flexes slightly instead of cracking under drying shrinkage or thermal movement. Because the latex also lets you cut the water-cement ratio for the same workability, the base matrix is denser and less permeable to begin with — the polymer film then seals what porosity remains. The result is a composite that stays keyed to the substrate and resists water vapour, frost and mild chemical attack far better than the unmodified mix.
Where it is used
- Waterproof coatings for roof slabs, sunken slabs and basements
- Bonding coats between old and new concrete casts
- Waterproof plastering and render on external and wet-area walls
- Polymer-modified repair mortars for spalled or damaged concrete
- Waterproofing of water tanks, retaining walls and sunshades
- Cement grouting, screeds and floor toppings
- Tile fixing, panelling and masonry jointing mortars
- Treatment of leaching and saltpetre (efflorescence) action
Key advantages
- Multipurpose 7-in-1 polymer — one drum covers coating, bonding, repair, screed and grout
- Makes cement mortar genuinely water-resistant and cuts salt permeation
- Tensile adhesion strength of at least 1.5 N/mm2 (EN 1542) with concrete failure at the bond line
- Improves toughness and flexibility, reducing shrinkage and thermal cracking
- Fully water-soluble — mixes into gauging water with no separate primer plant
- Can be diluted with water up to about 6 times depending on the application
- Lets you reduce the water-cement ratio for equivalent workability, giving a denser mix
- Improves frost, water-vapour and mild chemical resistance of the mortar
Limitations & considerations
- It is an admixture, not a stand-alone membrane — performance depends entirely on correct cement, sand and mix ratios on site
- Only bridges fine and micro-cracks; wide, moving structural cracks need a dedicated joint or crack-injection system
- Working time is short — roughly 20 to 30 minutes at +30 C — so mix only what can be placed in that window
- Substrate must be sound, clean and pre-saturated surface-dry before application, or the bond will underperform
- Should not be applied below +5 C or above +40 C substrate or air temperature
- Continuous stirring is needed during use to stop cement particles settling out of the slurry
Selection & best practice
Start with a sound, clean substrate — remove laitance, oil, rust, loose material and old coatings, and mechanically roughen smooth concrete by scabbling or grit-blasting to give a key. Pre-saturate cementitious surfaces to a surface-dry (SSD) condition with clean water at least two hours before you begin. Mix SikaLatex Power with the correct volume of water first to make the gauging solution, then add cement or cement-sand while stirring slowly until the mix is smooth, uniform and lump-free; adjust consistency within the mixing time and mix no longer than about two minutes with a slow-speed drill. Use the published ratio for the job — for example 1:2:6 (Power:water:cement) for a bonding coat, or 1:3:8 for a waterproof coating — apply a mortar or top coat while the bonding layer is still fresh and sticky, and keep the slurry stirred throughout placement. Cure the finished work like any quality cement mortar.
Specifications
| Chemical base | Styrene-butadiene rubber (SBR) latex emulsion |
| Appearance / colour | Milky white liquid |
| Specific gravity | ~1.02 |
| pH value | 8 ± 1 |
| Tensile adhesion strength | ≥ 1.5 N/mm2, concrete failure (EN 1542) |
| Waterproof coating ratio | Power : Water : Cement = 1 : 3 : 8, ~30 g/m2 per coat |
| Bonding coat ratio | Power : Water : Cement = 1 : 2 : 6, ~40 g/m2 |
| Application / working time | ~20 to 30 minutes at +30 C |
| Packaging & shelf life | 250 g to 100 kg containers; 18 months from production |
Industry use cases
Water-retaining structures
Waterproofing overhead and underground water tanks, sunken slabs and basement raft/retaining walls where continuous water contact is a given.
Concrete repair & rehabilitation
Site-batched polymer-modified mortars to patch spalled columns, beams and slabs, bonded tightly to the sound parent concrete.
Roofing & terraces
Waterproof coatings and screeds over roof slabs and sunshades that must resist ponding, thermal movement and monsoon exposure.
Wet-area finishing
Waterproof plaster, tile-fixing and jointing mortars for toilets, kitchens, water-affected facades and efflorescence-prone masonry.
Grouting & screeds
Reduced-viscosity cement injection grouts and polymer-modified floor screeds where bond and low permeability matter.
Frequently asked questions
Is SikaLatex Power a waterproofing membrane on its own?
What dilution should I use?
How is it different from standard SikaLatex SBR?
What adhesion strength can I expect?
How long do I have to work with the mix?
What pack sizes are available and how long does it store?
How we position Sika SikaLatex Power
Within the Sika family, choose SikaLatex Power when the job involves genuine water exposure or structural repair bonding; step down to standard SikaLatex SBR for routine bonding and general admixture duty. Pair it with Sika’s repair-mortar and grout systems on rehabilitation work, or with a dedicated membrane such as SikaTop Seal where a stand-alone waterproof coating is specified rather than a modified mortar. From our other brand lines, Space Arc also supplies comparable SBR polymers from Fosroc and Dr. Fixit, and we cross-match dosage and system build-up to your specification, exposure class and budget rather than pushing a single label.
Fosroc Nitobond SBR — Specify the Fosroc option when the project or consultant standardises on Fosroc systems, or when you want the SBR bonding aid to sit within a matching Fosroc repair-mortar and coating specification.
Related Concrete Repair products
Source Sika SikaLatex Power for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.