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Old 12-05-2008   #5
grumpygrouter
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Default Re: Wall Sealant Prior to tiling?

Using tubbed adhesive means that the adhesive dries by way of evaporation. As such, there needs to be some way for the moisture to "disperse". If you are tiling over glazed tiles or the "waterproof" tanked area, this evaporation takes much longer therefore the drying process is longer (days!). Powder adhesive on the other hand sets by way of a chemical process that does not rely on evaporation. That is the reason why I recommended powder adhesive for the tiled area. If you use powder adhesive you can grout much earlier as it will not effect the setting process like the tubbed stuff would be effected.

Powder adhesive would require priming of the plastered area as a neccessity. Primer is not expensive and is quick to do so you would be as well to consider it for all the areas that would require it.

You also need to bear in mind that British Standsrds (and therefore BAL) recommend that a shower area be left for 2 weeks after grouting before being brought into use.use

Your supplier was correct in that White Star is effectively self priming,

Grumpy


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