What is GFRC?

Article courtesy of Smooth-On, Inc.

GFRC stands for Glass Fiber Reinforced Concrete.  It is a composite comprised of Portland cement, fine aggregate, water, acrylic co-polymer, alkali resistant glass fiber reinforcement and additives.  In many international markets, it is referred to as GRC – Glassfibre Reinforced Concrete.  The glass fibers reinforce the concrete, much as steel reinforcing does in conventional concrete.  The glass fiber reinforcement results in a product with much higher flexural and tensile strengths than normal concrete, allowing its use in thin-wall casting applications.  GFRC is a lightweight, durable material that can be cast into nearly unlimited shapes, colors and textures.  There are two basic processes used to fabricate GFRC – The Spray-Up process and Premix process.


This FAQ article is offered as a guideline and offers possible solutions to problems encountered during mold making and casting. No warranty is implied and it is up to the end user to determine suitability for any specific application. Always refer to the provided Technical Bulletins (TB) & Safety Data Sheets (SDS) before using any material. A small scale test is suggested to determine suitability of any recommendation before trying on a larger scale for any application.