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?
You can easily fill the pinholes with our colour-matched Smoothing Paste. Simply apply this in the same way you would if you hadn't applied the sealer. Allow the smoothing paste to cure and apply another coat of sealer. Repair Guide Video Smoothing Paste Product Page
You definitely can shutter off the broken edges and use our Craft Mix. You will need to put a primer on the existing concrete to make sure the new concrete bonds to it The only issue with this would be that the craft mix won't match the colour of the rest of the hearth/surround. To … Continue reading Would it be possible to build an old polished concrete casted fireplace that has damaged edges and corners?
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?
If your worktop going seamlessly into an up-stand, the joint needs to be solid. So it needs to be glued and screwed to the worktop. Also scrim should be used at the junction between the two surfaces. https://youtube.com/playlist?list=PLoXVzcCrqgutD5i7T6iwoi7FH6dOLUHed
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?
When going over underfloor heating, the substrate onto which the microcement is laid needs to be dry. The moisture content in the floor should be no more than 4-5%. Ideally, the underfloor heating should have been operational for at least 2 weeks AFTER the full cure of the substrate below. The underfloor heating should be … Continue reading Can I use Microcement Over an Electric Underfloor Heating System?
Microcement is an extremely robust product. That said it is only as robust as the sub-base. The sub-base needs to be structurally sound so that there is NO movement in it. Any movement will mean an increased risk of cracking to the microcement. In terms of minimum thickness, this isn't really the issue. A sheet … Continue reading I want to use 18mm moisture resistant MDF as a sub-base for my microcement project. Is this ok or is it too thin?