Premix - Oscrete

Premix Glassfibre Reinforced Concrete (GRC) offers a streamlined approach to producing lightweight, durable concrete elements. Unlike the spray-up method, premix GRC involves blending alkali-resistant glass fibres directly into the mortar mix before casting — making it ideal for smaller components, decorative features, and artistic applications.

This method allows for easier handling, consistent fibre distribution, and greater flexibility in mold design. It’s particularly well-suited to manufacturers producing high-detail elements, repeatable shapes, or custom finishes with minimal setup.

What Makes Premix GRC Different?

The fibres are uniformly dispersed throughout the mix, enhancing tensile and flexural strength.
The mix can be poured, vibrated, or pumped into molds — reducing reliance on specialist equipment.
It’s ideal for intricate designs, fine textures, and smaller-scale production runs.

Premix GRC is commonly used for:

Decorative panels and moldings
Interior wall features and ceiling tiles
Furniture, sinks, and vanities
Sculptural and artistic installations
Lightweight civil components like ducts and channels

Oscrete’s Premix GRC Solutions

Oscrete supports premix GRC producers with a tailored range of admixtures and additives that enhance workability, surface finish, and long-term durability. Our solutions are designed to help manufacturers achieve consistent results, reduce shrinkage, and improve casting efficiency.

Our premix GRC product range includes:

Superplasticisers for improved flow and reduced water demand
Polymer additives to enhance flexibility and surface quality
Pozzolanic materials for long-term durability and reduced permeability
Curing agents to support strength development and minimise cracking
Surface treatments for improved adhesion and finish protection

Technical Support & Innovation

Oscrete’s technical team works closely with GRC manufacturers to optimise mix designs, troubleshoot production challenges, and develop bespoke formulations. Our in-house laboratory enables rapid testing and validation, while our New Product Development (NPD) programme ensures we stay ahead of evolving market needs.