I really couldn't think of any other word to use other than grouting!!
Anyway. I'm about to polish up and treat some internal sandstone
flagstones, and all the edges (between each flagstone) needs
"re-grouting". What would be the recommended material to use for this?
I remember someone telling me to use a polymer based material as it is
much tougher than other materials such as sand and cement.
Thanks in advance
A flexible polymer filler is the best idea because it allows the floor to
move and breath easier than hard sand / cement mixtures. But a word of
caution on using either method.
Try NOT to get any of the mixture on the surface of the stone.
The fillers, all of them, can easily stain the surface and is difficult to
remove, so cover the stones with a sheet of newspaper or cardboard and tape
the edges down a bit to stop this happening to much. The same sheets of
paper can be used again and again all over the floor, so you don't need to
cover everything before starting the job. Just make sure you keep the
surface of the flags as clean as you can.
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