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Discuss Out of Date Ardex X7 G - Adhesive Past Sell By Date in the Adhesive and Grout area at TilersForums. USA and UK Tiling Forum

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By way of background that might go some way to explain this question - I'm from Yorkshire...

I have some bags of Ardex X7 G tile https://www.tilersforums.com/forums/tile-adhesive/ left over from a DIY tile job i did in spring 2016, when i tiled my downstairs shower room/ toilet. There are two unopened bags and one open. The date mark on all the bags is April 2015. The use by date is one year after that according to the manufacturers. However, I stored the bags in a dry attic wrapped in bin liners. After three years the contents are still powdery i.e. they haven't been exposed to damp and there are no hard lumps in them.
Three years later I'm now starting another DIY tile project in my ensuite and want to use the old Ardex (I don't like wasting brass) so the other day I mixed up the powder from the opened bag of three year old Ardex X7 G and stuck about 1 square metre of 600 x 300 porcelain tiles to bare plastered walls in my ensuite. The powder mixed as normal, applied well and the https://www.tilersforums.com/forums/tile-adhesive/ dried as usual. After two days all looks well - the tiles are stuck fast to the wall and not going anywhere. In other words, the https://www.tilersforums.com/forums/tile-adhesive/ seems absolutely fine, even though it is over three years past its use by date.

So my question is - does the age of the powder effect its https://www.tilersforums.com/forums/tile-adhesive/ qualities?

I think - although I stand to be corrected- that the reason such products have a sell by date is because they contain a chemical that reduces the potentially harmful Chromium VI that naturally appears in grey Portland cement (which this product contains) and that chemical starts to become ineffective after one year. So the sell by date for this particular product is for health and safety reasons rather than due to loss of https://www.tilersforums.com/forums/tile-adhesive/ qualities.

Am i missing something?

Your experiences / comments would be welcome.

Cheers
 

Tile Fix Direct

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From memory the Chromium VI issue appeared about 7 year + ago (time flies) and was the result of an EU regulation regarding H&S risk. The https://www.tilersforums.com/forums/tile-adhesive/ manufacturers were not best pleased with the reg and considered the risk very low. However, the result means most cement https://www.tilersforums.com/forums/tile-adhesive/ generally goes out of date at about 6 months for H&S reasons, although the setting strength is not affected (I think). However, your https://www.tilersforums.com/forums/tile-adhesive/ is 4 years old so you really would be pushing your luck for the sake of a few quid.
 

Tile Fix Direct

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TF Official Sponsor
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Not very interesting reading but it appears Chromium VI is a skin irritant that leads to eczema and dermatitis. By adding a compound to cement the chromium VI is neutralised when water is added, but the neutralising agent degrades in some way over time. This is why use by dates for cement based products are not as long as they used to be.
Yawn!
https://ec.europa.eu/health/archive/ph_risk/committees/sct/documents/out158_en.pdf
 
I

Italy

for me it's still good,
You kept it in a plastic bag and you have walls
plastered, I wouldn't trust plasterboard or other panels.
as tom says, at most I would add an additive.
 
OP
S
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Many thanks for the very helpful comments - especially the suggestion to use some additive. I'm mulling over whether to use the old Ardex X7 or maybe splash out on some new pre-mix https://www.tilersforums.com/forums/tile-adhesive/ that will save me time and effort mixing the powder. Thanks again.
 
D

Dumbo

Do not use readymix with those tiles . You should use a bagged https://www.tilersforums.com/forums/tile-adhesive/ as the air drying readymix will take an absolute age to dry .
 
O

Old Mod

Not very interesting reading but it appears Chromium VI is a skin irritant that leads to eczema and dermatitis. By adding a compound to cement the chromium VI is neutralised when water is added, but the neutralising agent degrades in some way over time. This is why use by dates for cement based products are not as long as they used to be.
Yawn!
https://ec.europa.eu/health/archive/ph_risk/committees/sct/documents/out158_en.pdf

You’ve obviously not seen the movie
Erin Brockovich. :D (True story)
 

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