24th May 2022, 12:40 PM
Hi there, I used a product recently which sounds like it could be pretty similar. The product I used was Shower Plug, which is used for sealing showers/tiles/grout/masonry/concrete - it is applied, then any excess is meant to be wiped off.
If not wiped off it can apparently form a white residue, which they advise can be removed with mineral turpentine.