Egger D4 foaming polyurethane adhesive query

[cjard]

Hi all..

Just wondering if anyone has used this adhesive consistently in the recent past:

http://www.egger.com/UK_en/products/?N=4294964873+21&R=product-4974-uk-en

Once upon a time, the bits that foamed out of gaps between floor deck boards had to be removed with a knife and the cured glue was always a little bit plastic/bendy, but the latest batch of bottles I have smells a bit different and the foam just crumbles to dust under light pressure, kinda like a Quavers crisp would

Does anyone else find this, or do I have a bad batch of glue here?

 

[big-all]

i would clamp 2 bits off say 4x2 or 3x2" together then split them after say 2 days suspect it will be very easy rather than nearly impossible
all the foaming i have used ia as your first description
http://www.toolstation.com/shop/p93568

 

[gregers]

same here.

 

[cjard]

Bit of feedback on this - my own testing, backed up by Eghger's technical line giving the same responses

It's apparently entirely normal for this glue to behave like this in low temperatures and it can be exacerbated by dry conditions

I took 4 bits of flooring, wet 2 of them, glued them all and then left a wet and dry pair to bond on site and took the other wet and dry pair home to sit in the warm. The warm, wet glue bonded and turned squishy/flexible/tough soonest, followed by the warm dry one. The site glued items took a full 3 days longer to become squishy/flexible/tough, though the wet one bonded a bit better

I subsequently had the installers spray the decking with a fence sprayer just to moisten it a little as there wasn't a lot I could do about the temperature. The build was unusual in that it's more dry than normal, not only for the recent weather conditions, but because the external skin of the timber frame already exists (and with no large window openings) so the air inside the building tends to stay more dry than outside, particularly at night

I'd recommend anyone having the same query with a foaming adhesive, if the temp is low (it was max 14 degrees on site recently) to leave it a very long time and see how it goes..

 

[big-all]

thanks for the feedback really handy
did you try a destruction [seperation] test on both warm and cold samples