I have recently casted a concrete table top using the ‘GRFC Concrete Worktop Premix’. We want the table top thicker/wider but the slab has already set. How would I do this?

To increase the size, you’d have to build the new mould around the existing and pour new concrete around it, using either the craft mix or worktop premix. Each surface where the new concrete meets the old would need to be primed using our universal primer. In either case, you would then have to go … Continue reading I have recently casted a concrete table top using the ‘GRFC Concrete Worktop Premix’. We want the table top thicker/wider but the slab has already set. How would I do this?

What do I do if there are holes on my concrete project?

If you have made your concrete using our Worktop Premix, then the Smoothing Paste is perfect for filling in any small holes or imperfections. If you have used microcement then a small amount of the microcement can be used to repair any holes or imperfections. Take a look at our Repair Guide in our Video … Continue reading What do I do if there are holes on my concrete project?

Where Can I Use Your Microcement and Premix Kit?

The premix kit is effectively traditional concrete but enhanced for use as a worktop and as furniture etc. It is suited to the prefabrication method wherby the concrete premix is poured into moulds. Microcement is a 3-5mm skin of concrete that is applied over a substrate. The substrate can be timber, cement board, concrete, plasterboard … Continue reading Where Can I Use Your Microcement and Premix Kit?

Basic Worktop Premix Concrete Casting Instructions

Introduction Concrete by nature is heavy so we recommend that for any larger decorative concrete panel items such as tabletops or countertops that a maximum thickness of 20mm is designed. To create the appearance of thickness we recommend that a “lip” be formed around the perimeter of the item. Following is the basic method by … Continue reading Basic Worktop Premix Concrete Casting Instructions

I would like to make some smaller items such as coasters or candle holders. Are your products suitable?

Yes they are. The Concrete Worktop Premix Kit is extremely versatile and can be used. If you plan to use the kit in small batches, all you need to do is dry mix all of the ingredients in the bucket to make sure they are all blended together. You will need to weigh out the … Continue reading I would like to make some smaller items such as coasters or candle holders. Are your products suitable?

Do the finished surfaces differ with the prefabrication method and “cast-in-place” method?

With the prefabrication method, using our Worktop Premix Kit the finish is as smooth or rough as the surface onto which you cast you concrete. So if you cast onto a very smooth piece of plastic or melamine then the concrete surface will be very smooth. If you cast on to a material with texture … Continue reading Do the finished surfaces differ with the prefabrication method and “cast-in-place” method?

What is the recipe for GFRC Concrete?

This does vary because no two cements are the same, sands are of different grades, some additives are stronger than others but the general recipe is as follows; A Equal parts Cementitious Material and Sand (Cementitious Material = Cement and up to 25% of Pozzolan) B Acylic Polymer - 5-6% cement weight C Superplasticiser - … Continue reading What is the recipe for GFRC Concrete?

Should I use CSA Additive to accelerate the curing of my concrete?

Generally with our Premix and Craft Mix Kits, CSA is not required. The blend and quality of cementitious ingredients will ensure that the concrete will cure quickly enough to be processed within 24 hours of the initial pour. If you are blending your own sourced cement, sand and additives the CSA can be a good … Continue reading Should I use CSA Additive to accelerate the curing of my concrete?