As with ordinary tiling it is usual to grout the joints in between the tesserae. We vary grout colour according to the mosaic colours. We use darker grout with darker mosaic and lighter grout for paler mosaic to bring cohesion to the design. In decorative mosaic you might consider leaving the joints ungrouted. We recommend powder grouts that you mix into a paste with water. 

Mosaic Workshop has stocked Instarmac Ultra Tile Fix in 3kg bags for several years now.  This product has now been discontinued so we're selling the remaining stock and phasing in a new range of BAL grouts as an excellent alternative.  These are a new generation of grouts with lots of improved features; better flexibility, faster drying times, built in mould resistance and better sustainability credentials.  I'm sorry to say that they are significantly more expensive than the Instarmac grouts, so we are offering them in 1kg boxes to lessen the pain.   Let us know what you think of them. 

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