The Brew Cabin

Posted: **Sun Jun 16, 2019 11:37 am**

Hi there,
We have a patio laid from Indian sandstone which requires the old mortar grout to be removed and re-done as its breaking up and cracking.
I'm thinking of using a brush in wet resin grout, haven't decided which one yet, and also seal the slabs, again not decided which product.
My query is, do I apply the sealer before the resin grout or the other way round ?
Any advice appreciated.
Thanks

Posted: **Thu Jun 20, 2019 5:16 pm**

It doesn't really matter but....

If you seal first, then leave AT LEAST a week before jointing to ensure the selant has properly cured. Some jointing mortars (2-part) have a resin that can soften some sealants.

If you joint first, allow AT LEAST 3 days before sealing, for more or less the same reason, but be aware that some jointing products (both 1-part and some 2-parts) can leave a residual film on the surface of the paving so it's better to wait until that (if it appears) has weathered away (usually takes a couple of weeks) before sealing.

Personally, I would never seal a pavement less than 12 weeks old and, given my own way, I'd actually leave it for a year to ensure any efflorescence or other marking problems have had a more-than-fair chance to make themselves scarce.

The Brew Cabin

Sealing before or after ? - Grouting & sealing