Skip to content
Concrete Admixtures · Superplasticizers

Sikament® RB 858

Official name Sikament® RB 858 PK

Dual-Action Superplasticiser & Water-Reducing Concrete Admixture

Sika TDS On demand
Available on order Not held in stock. Ask us for the current lead time and minimum order.
Brand
Sika
Packing
Drums / IBC / bulk (refer to current packaging / price list)
  • Dual Action Works as a superplasticiser and water reducer.
  • Improved Workability Greatly improved workability and easy placement.
  • Water Reduction Impressive water reduction with strength improvement.
  • Slump Retention Maintains workability for prolonged periods.
  • Reduced Segregation Improved cohesion reduces the risk of segregation.

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.
  • Technical support from MCTOur team helps you choose the right solution.
  • DeliveryContact our team to confirm delivery and lead times to your location.

Key benefits

  • Dual Action
  • Improved Workability
  • Water Reduction
  • Slump Retention
  • Reduced Segregation
  • Hot-Climate Suitable

Sikament® RB 858 PK — Dual-Action Superplasticiser & Water-Reducing Concrete Admixture

Sikament® RB 858 is a highly effective dual-action liquid superplasticiser and water reducer with excellent slump retention. It greatly improves workability, is especially suitable for slender components with densely packed reinforcement, reduces the need for vibration and improves cohesion to reduce segregation. Suitable for hot and tropical climatic conditions.

Recommended uses

  • Free-flowing / rheoplastic concrete
  • Slabs, foundations, walls and columns
  • Slender components with dense reinforcement
  • Ready-mixed and pumped concrete
  • Slabs, foundations, walls, columns, piers and piles

Tags

Technical information

Technical information

Verified performance data for Sikament® RB 858 PK, taken directly from the Sika Pakistan Product Data Sheet.

Sikament® RB 858 PK — technical data
Chemical BaseOrganic polymer blend
Packaging05 ltr jerry can 20 ltr plastic can 200 ltr drum 1000 ltr IBC Bulk supply in tanker is possible on demand
Appearance / ColourDark Brown Liquid
Shelf Life12 months minimum from production date if stored properly in original unopened packaging
Storage ConditionsThe product must be stored properly in undamaged, unopened original sealed packaging in dry conditions at temperatures between +5° C and +35° C. Protect from direct sunlight and frost

Technical data: refer to the latest official Sika Pakistan Product Data Sheet, available on request.

Packaging & storage

Packaging & storage

Packaging

Drums / IBC / bulk (refer to current packaging / price list)

Storage

Store in undamaged, unopened, original sealed packaging in dry conditions, protected from direct sunlight and frost. Refer to the PDS for exact storage temperature and shelf life.

Application guide

Application guide (5 easy steps)

  1. Determine DosageEstablish the optimum dosage by trial mixes with the actual materials and conditions. Typical dosage ranges are given in the current Sika Pakistan PDS.
  2. DispensingAdd the admixture to the concrete with the mixing water, ideally after most of the water has been added and all solids are wetted. Do not add to dry aggregate or cement.
  3. MixingMix thoroughly to fully disperse the admixture and develop workability and water reduction.
  4. PlacingPlace the high-workability concrete with reduced vibration; ensure formwork is properly secured.
  5. CuringCure properly, especially at high temperatures, using Sika Antisol products or wet hessian.

Follow the official Sika Technical Data Sheet for full application details.

Technical documents

Data sheets for this product

Technical Library
PDF
Sikament® RB 858 PKProduct Data Sheet · June 2025, Version 03.01
627 KB PDF

More data sheets in Concrete Admixtures

FAQs

Frequently asked questions

What is Sikament® RB 858?

Dual-Action Superplasticiser & Water-Reducing Concrete Admixture. It disperses cement particles to give high workability, water reduction and slump retention.

What is the dosage?

Determined by trial mixes; typical ranges are given in the current Sika Pakistan PDS.

When is it added?

With the mixing water, after most of the water is added and all solids are wetted; not onto dry cement or aggregate.

Is it suitable for hot climates?

Yes, it is formulated for hot and tropical climatic conditions.

Where are the full technical specifications?

Detailed dosage and density figures are in the current official Sika Pakistan Product Data Sheet, available on request.

Reviews

There are no reviews yet.

Be the first to review “Sikament® RB 858”

Your email address will not be published. Required fields are marked *

Quotation

Request a quotation for Sikament® RB 858 PK

Tell us the quantity and the site. We reply with price, lead time and the right pack size.

We use these details only to prepare your quotation and confirm availability. Prefer to talk? Call +92 300 5254439.

Technical advice

Need technical advice or current price?

Our team helps contractors and specifiers choose the right Sika solution and quote current pricing.

Chat on WhatsApp +92 300 5254439No prices are shown online — every quotation is prepared for the project.

Consult to Place Order