Concrete Admixtures · Superplasticizers
Sika® ViscoCrete®-3110 star PK
Concrete Admixture for High Flow/Self-Consolidated Concrete
Sika TDS On demand
View product & data sheet Get price on WhatsApp
Concrete Admixtures · Superplasticizers
Sikament® RB 850
High-Range Water-Reducing & Slump-Retaining Concrete Admixture
Sika TDS On demand
Available on order Not held in stock. Ask us for the current lead time and minimum order.
- Dual Action Works as both a superplasticiser and a water reducer.
- Excellent Slump Retention Maintains workability for prolonged periods.
- Improved Placement Concrete places easily with less vibration.
- Reduced Segregation Improved cohesion allows greater time for placement.
- Water Reduction Impressive water reduction with final strength improvement.
Prices are quoted per project — no prices are shown online.
- Sika products supplierIslamabad & Rawalpindi.
- Get a quote on WhatsAppSend your product and quantity for current pricing.
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Product at a glance
Temperature range
+5 C to +35 C
Key benefits
- Dual Action
- Excellent Slump Retention
- Improved Placement
- Reduced Segregation
- Water Reduction
- Broadly Compatible
Sikament® RB 850 — High-Range Water-Reducing & Slump-Retaining Concrete Admixture
Sikament® RB 850 is a highly effective dual-action liquid superplasticiser that imparts excellent slump retention for prolonged periods. It greatly improves workability and provides impressive water reduction and final strength improvement, and is suitable for hot and tropical climatic conditions. It is used to produce free-flowing concrete for slabs, foundations, walls, columns, piers, piles and slender, densely reinforced components.
Recommended uses
- Free-flowing concrete for slabs and foundations
- Walls, columns, piers and piles
- Slender components with dense reinforcement
- Mixes with microsilica, fly ash and GGBS
Technical information
Technical information
Verified performance data for Sikament® RB 850, taken directly from the Sika Pakistan Product Data Sheet.
| Chemical Base | Organic polymer blend |
|---|---|
| Appearance / Colour | Dark brown liquid |
| Specific Gravity | 1.2 +/- 0.03 |
| pH Value | >= 6 |
| Total Chloride Ion Content | <= 0.2% (EN 934-2) |
| Recommended Dosage | 0.8-2.0% by weight of binder |
| Standards | ASTM C494 Type G; EN 934-2 |
| Shelf Life | 12 months from production |
| Storage Temperature | +5 C to +35 C |
Source: Sika Pakistan Product Data Sheet, Sikament® RB 850 (June 2025, Version 03.03).
Packaging & storage
Packaging & storage
Packaging
5 L jerry can, 20 L can, 200 L drum, 1000 L IBC (bulk tanker on demand)
Storage
Store in undamaged, unopened, original sealed packaging in dry conditions between +5 C and +35 C. Protect from direct sunlight and frost.
Shelf life
12 months from date of production (correctly stored).
Application guide
Application guide (5 easy steps)
- Determine DosageEstablish the exact dosage by trial mixes. As a guide, use 0.8-2.0% by weight of binder; other dosages may suit specific mix designs and climatic conditions.
- DispensingAdd Sikament RB 850 as a separate component, poured into the concrete right after the first 80% of the mixing water (when all solids are wetted). Do not add to dry aggregate.
- MixingMix thoroughly to disperse the admixture and develop full workability and water reduction.
- PlacingEnsure formwork is properly installed and secured for high-workability mixes. Place with reduced vibration.
- CuringCure the fresh concrete properly, especially at high temperatures, using Sika Antisol products or wet hessian to prevent plastic and drying shrinkage.
Follow the official Sika Technical Data Sheet for full application details.
Technical documents
Data sheets for this product
More data sheets in Concrete Admixtures
FAQs
Frequently asked questions
What is Sikament® RB 850?
A dual-action liquid superplasticiser and water reducer with excellent slump retention, used to produce free-flowing concrete.
What is the dosage?
A guide range of 0.8-2.0% by weight of binder; confirm the exact rate by trial mixes.
How does it differ from Sikament RB 850 PK?
They are separate products with separate Sika Pakistan PDS documents and different dosage bases and approvals.
When is it added?
After the first 80% of the mixing water, once all solids are wetted; not onto dry aggregates.
What standards does it meet?
ASTM C494 Type G and EN 934-2.
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