SikaRapid-2 KE 5L Concrete Accelerator & Hardening Admixture — Chloride-Free, KEBS Approved | Nairobi, Kenya
SikaRapid-2 KE — Setting Accelerator for Concrete & Mortar
A ready-to-use liquid admixture that makes concrete set faster and gain early strength sooner — so you can strike formwork earlier, finish jobs faster and turn moulds around quicker, without reducing the final strength of your concrete.
Product Overview
SikaRapid-2 KE is a liquid hardening accelerator produced by Sika Kenya for concrete and cement mortars. It speeds up early setting and early strength development, which is a big advantage in cold or wet weather, on tight construction schedules and in precast yards where moulds must be reused the next day.
Because it is chloride-free, it does not promote corrosion of steel reinforcement, making it suitable for reinforced and precast concrete work. For best results it is used together with a Sika superplasticiser (water reducer) in a well-designed concrete mix.
Technical Specifications
Key Benefits
⚡ Faster Setting
Concrete and mortar stiffen and harden sooner, reducing waiting time on site.
💪 High Early Strength
Reach handling and demoulding strength earlier for quicker progress.
🏗️ Earlier Formwork Removal
Strike shutters sooner and reuse them — fewer formwork sets needed.
🔁 Faster Mould Turnaround
Ideal for precast yards producing blocks, kerbs, poles, slabs and culverts.
🛡️ Steel-Friendly
Chloride-free formula — safe for reinforced concrete.
📈 Final Strength Kept
Speeds up early hardening without lowering the long-term strength.
Where to Use It
- Precast concrete — blocks, paving, kerbs, culverts, fence posts, manholes and slabs
- Ready-mix concrete — where early strength or faster finishing is needed
- Site-mixed (in-situ) concrete — slabs, columns, beams and floors
- Slip-forming and fast-track construction where formwork must move quickly
- Cold or damp weather concreting when setting slows down
- Cement mortars and repair work needing quicker hardening
Recommended Dosage
Example: for one 50 kg bag of cement, use about 0.5 kg to 1.0 kg of SikaRapid-2 KE.
Carry out trial mixes with your local cement, sand and aggregates to confirm the best dosage for your job.
How to Use
- Measure the cementWork out the cement quantity in your batch and calculate 1–2% of that weight.
- Add to the mixing waterPour SikaRapid-2 KE into the gauging (mixing) water, or add it at the same time as the water into the mixer.
- Never add to dry cementDo not pour it directly onto dry cement — always dispense with the water.
- Mix thoroughlyMix until uniform. If adding to a transit mixer on site, mix for an extra 1 minute per cubic metre of concrete.
- Place and compact quicklyThe concrete will set sooner, so place, compact and finish without delay.
- Cure properlyStart curing as early as possible using recognised methods (wet hessian, water spraying or curing compound).
Important Precautions
- Do not add to dry cement — always dispense with the mixing water.
- Follow good concreting practice for batching, placing, compaction and curing.
- Do not exceed the recommended dosage without trial mixes.
- Wear gloves and eye protection; wash off skin contact with clean water.
- Keep the container tightly closed and out of reach of children.
Frequently Asked Questions
What does SikaRapid-2 KE do?
It speeds up the setting and early hardening of concrete and mortar, so formwork can be removed and moulds reused sooner.
Will it reduce the final strength of my concrete?
No. It boosts early strength development without lowering the final strength when used at the recommended dosage.
Is it safe for reinforced concrete?
Yes. It is chloride-free, so it does not encourage rusting of steel reinforcement.
How much do I need per bag of cement?
Use 1–2% of the cement weight — about 0.5 kg to 1.0 kg for every 50 kg bag.
Can I mix it with a superplasticiser?
Yes. It works well in combination with Sika superplasticisers for high-quality, fast-setting concrete.
Do you deliver?
Yes — same-day delivery within Nairobi and next-day delivery countrywide, or free pickup at our Rongai and Tuala branches.
Why Buy from Shabbiri Hardware?
Since 1990
Over three decades supplying builders, contractors and homeowners.
100% Genuine Sika
Original products sourced directly — no fakes.
Two Branches
Ongata Rongai and Tuala on Magadi Road.
Delivery & Pickup
Same-day in Nairobi, countrywide next-day.
Visit Our Branches
📍 Ongata Rongai Branch
Magadi Road, opposite Hashi Petrol StationSpecifications
| Brand | Sika |
| Model | sikarapid- 2 ke |
| Category | Waterproofing & Sealants |
| Availability | In stock |
| Sourced by | Shabbiri Hardware Kenya Limited |
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