Bostik Colours for Cement Buff - 1kg - For Concrete - Mortar

Good product, but the quantity needed for a big job would make you wince - in which case order it already coloured and mixed.

Mixed up okay and produced a good colour but you need to use a fair bit.

I’ve tried many times to match the colour of mortar when repointing, this really does the job. Easy to mix and perfect for making the mortar the right shade.

Powerful stuff in the sense you don’t need a lot of it to do the job of colouring you compo ( mortar ) good quality, just be careful how much you use , to much the buff colour will be a bright yellow , measuring is vital .

Excellent product.

As others have said, it is really tricky to get a good consistent colour across batches. You will need to apply a scientific approach to this. You can’t really see the colour until it has dried off and by that time it’s a bit late if you get it wrong. My “buff” mix was an orangy shade of yellow which now sticks out like a sore thumb in the pointing that I have done. Looks like I am going for the paint I used before to blend it in.

I used both the Buff and Red Brick coloured Cementone. Buff for the 30 segmental slabs to form a circle and red brick for the small setts or bricks to go either side of the slabs. Note photo is not the finished job. I found I could use less buff Cementone than Bostik recommended but that I needed more red brick to get the colour I wanted. The concreting sand, granite aggregate and white cement were volume batched and the Cementone accurately weighed for each batch. You need to mix the Cementone well with the cement before mixing the concrete. The Cementone worked very well and gave consistent results and I would be happy to use this product again.

does exactly as described