Glass Reinforced Concrete (GRC) or Fibre Glass Reinforced Concrete (FGRC or GFRC) is becoming an important material for many uses.

In the construction industry, it is use for sound barrier, wall cladding, pre-fab form work, wall panels, tanks, pipe, … In other area, it is use for furniture, decorative products, garden items, etc., just to name a few.

By adding exact amount of cement, sand, water and alkaline resistance glassfibre together with various additives, the strength and properties of the compound can be adjusted to suit different application need at different production situation.

Pre-cast GRC is usually manufactured in factory protected from the environment. Humidity and temperature control as well as good quality control will allow consistency in product quality.

The lower cost of construction, improve in quality and attractive design, much lighter to transport and construct all contribute to the success of GRC becoming a more and more popular material for both the architectural and non-architectural use. A Green product of the future.

GRC is not a single material but a family of high-performance cement-based composites reinforced with special alkaline resistance fiberglass. This material can be designed/engineered to suit different applications.

The main components of GRC consist of Cement, Sand, Water, Alkaline Resistance Glassfibre and Chemical Admixture(s).

Each manufacturer will have their own formulation to produce products for different application. The usual mixing ratio is 1:1:0.35-0.4 for Cement : Sand : Water. Glassfibre content range from 3 to 6% pending on production method.

Cement use are either white or grey CEM-1 portland cement. Silicon sand of 1mm is commonly used. Water must be clean and alkaline resistance with zircon content of no less than ….. % should be use to form the mixture. Different admixtures are use in improving the mixture and also use in post curing, coloring and surface protection.

GRC are produce in two processes – Vibration Casting (Premix) or Spraying. Vibration Casting GRC is produce first by mixing the mixture in a high speed mixer, glassfibre is then added using a lower speed. The Premix is then pour into moulds and compact by vibration.



Sprayed GRC can be done either by hand or by machine. With the use of a special spray gun, slurry and glassfibre will be spray and mix before deposit onto the mould surface. A roller is then use to flatten and compact the material. A higher percentage of glassfibre can be mix with the slurry with a two dimensional matrix, thus create a much stronger bond and strength.

Premix can also be spray for rendering and for the production of smaller elements.

To truly understand the potential of GRC, it is necessary to learn the advantage of this material, its flexibility, strength, durability and cost effectiveness.

Ever since the construction of the Pyramid, the Great Wall and the Roman Empire, human have been experimenting with the use of bonding material for masonry for construction. Today concrete technology is both advance and reliable. The use of concrete can be seen everywhere. From high rise to boat building, from the largest dam to a small water tank, places to pre-fabricated houses, road, bridges, … the use is innumerable. Riding on the this well proven and advancing technology, with the use of specially designed Alkaline Resistance Fibreglass, a family of material is form and its application can expand further the ability of concrete to a new dimension.



GRC is Flexible, Light Weight, Excellent Reproduction, Easy to Mould, High Strength, Finish Ready, Environmentally Friendly, Easy to Hand and Erects, No Corrosion, Durable, Easy to Fix, Crack Resistance, Impact Resistance, Thermal & Acoustic Properties, Seismic Properties, Economical to Transport & Produce, Consistent Finish, Factory Condition Production, Aesthetics, Fire Resistant, Low Resistance to Water Flow, … a truly Green Product.

The type of products can be make from GRC is limited only to your imagination. It is common to use GRC in construction for cladding, façade, wall, super-structure, historical building replication or repair, sound barrier/reflector, window surround, column, features, roofing, prefabricated building, foundation and floors, pavers, tunnel cladding, covers, cable & water tank, conduit and pipes. For home use, GRC is use in landscaping, sculptures, garden wall, pots & urns, replica rock, table and furniture, pool and spa pool cladding, fountain, statutes, stepping stones,… just to name a few.

The Shape of the GRC products is highly flexible, since GRC is a slurry material it will form any shape according to the design. Although an overhang or vertical wall exceeding 1m high is hard to spray GRC, the construction can be in stages to resolve this problem. With the use of rubberize / silicon moulds, complicated shape be produce.

The Finish of the GRC can be from very smooth to very rough. GRC slurry can copy any shape and pattern with high precision. The whole GRC panels can be produce with rough stone finish to one part and glass smooth wall on the other. The opening for window and access can be cut out during production and make installation much faster.



The Color of GRC can be divided into 3 types. The use of Color Pigment which is usually added to the skim coat with grey or white cement to allow a permanent color with a depth of 3-6mm. The use of Acid Wash to etch different colors by reacting with the lime. And the use of Dye. The surface of the product can further treated with wax, vanish or specialty products either for protection or to enhance the coloring.