Gooner 143 Posted June 10, 2019 Report Share Posted June 10, 2019 Well laid patio Saturday and noticed a lot of white powder residue on slabs, when wet not visible how long does it take to stop coming through, is there anything I can apply to help get rid? Thanks in advance 1 Quote Link to post Share on other sites
Welsh_red 4,298 Posted June 10, 2019 Report Share Posted June 10, 2019 Is is in the shape of the cement underneath? I usually paint SBR on the underside to stop it transfering thru 1 Quote Link to post Share on other sites
shovel leaner 7,648 Posted June 11, 2019 Report Share Posted June 11, 2019 Try this 2 Quote Link to post Share on other sites
Gooner 143 Posted June 13, 2019 Author Report Share Posted June 13, 2019 Thanks for the suggestions but all this rain we've had with a bit of broom work seems to have removed 95% of it so will see how it goes 1 Quote Link to post Share on other sites
j j m 6,477 Posted June 16, 2019 Report Share Posted June 16, 2019 that's good bud Quote Link to post Share on other sites
jiggy 3,207 Posted June 17, 2019 Report Share Posted June 17, 2019 https://www.woodies.ie/santrax-brick-tile-concrete-cleaner-5l-508949?utm_source=google_shoppinggclid=CjwKCAjw0ZfoBRB4EiwASUMdYdJXVLDZkHcoFkBDRa88DNaV7CV5NP6MaVHdwT7cFhc3QRYUBEGpVRoCY7gQAvD_BwE Sometimes it takes 3 treatments over time before efflorescence finally disappears. Quote Link to post Share on other sites
Qbgrey 3,965 Posted August 28, 2019 Report Share Posted August 28, 2019 As said sbr,or pva with cement powder and a dash of water painted on back.they lift snyway without glueing them down. Quote Link to post Share on other sites
j j m 6,477 Posted March 23, 2020 Report Share Posted March 23, 2020 just bought some today Quote Link to post Share on other sites
foxdropper 17,092 Posted November 28, 2020 Report Share Posted November 28, 2020 The efflorescence is a reaction between the lime in the stone ,concrete and the sulphur in the cement .Many tricks have been tried to prevent it but unfortunately it happens and can happen years after being layed .The tub pictured above is an acid .Use sparingly or you’ll take the muck joints out . Quote Link to post Share on other sites
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