On Mon, 13 May 2019 05:40:11 +0100, Bill Wright wrote:
You can take a sample squidge it onto the wall intended for the tiles
and see what happens.
Does it set in about the right amount of time?
When set is it stuck to the wall?
When set is it a hard solid layer?
If the answer to all those is "yes" the chances are it's fine.
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