Joined: July 2004
||Posted: 25 April 2017,17:26
GeoFix??? Impressed? Oh - you said he was a builder, so not a paving professional with an opinion worth taking on board, then!
They use polymerics for jointing block paving in N.America. They keep trying to cajole us Europeans (including the Dutch who invented block paving) that we, too, should be using polymerics to joint our paving, but we're not as bloody daft as they are, so we firmly, but politely, say no.
The polymerics they use a subtly different to the comedy products you mentioned, but even the best of them (which isn't particularly cheap) will NOT withstand a power washer.
The 'official' advice from the pabving industry big-wigs is that you should use a stabiliser, by which they mean a *proper* jointing sand stabiliser, not a made-to-a-budget, diluted-to-buggery-and-back, glorified wallpaper paste from a DIY shed, but even if you did splash out on a professional grade stabiliser, they do not stand up to power washing.
In my experience, and I've been effing about with sealants and stabilisers on block paving for 37 years now, the *only* method to permanently fix the jointing is to use a high quality specialist sealant for block paving.
You can go for shiny or matt, or one that you can't even see: there is a good choice out there, but it's only a*quality* sealant that will properly bind the sand and make it virtually immovable, even with a power washer.;) ;)
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