Polyurethane on Pandies

• Don't get it on your hands.
• Wear gloves over your hands
• Don't use PU glue, it's crap
• Acetone (and moisturiser afterwards)

NB - nail polish remover won't do, as that's ethyl acetate these days, not acetone

Is PU glue essentially the same base as expanding foam? Just that I recently got some of that on a carpet (ouch) and to my eternal relief it came off beautifully with nail polish remover (whatever that was made of

- but it was a new bottle).

David

Remove skin first. R.

Don't get it on them in the first place, never use it unless you are also wearing clothes you don't mind ruining. I have a t-shirt with a nice smear on the shoulder which came while I was assembling big end frames for an arbour seat...

Peter

To the level which I care to explain in ASCII, yes.

What makes you say that? It's incredibly strong IME and completely waterproof.

Thanks for that - invaded number 1 daughters room & it worked a treat!

Read this (last?) month's Fine Woodworking review.

PU glue has several failings:

• It's expensive
• Shelf life is poor
• Hand cleaning!
• It foams, to varying extents, making job clean-up a problem. You might get away with this outdoors, but it tends to rule it out for neat work indoors.
• It has no gap filling ability. It certainly _fills_ a gap, but the foamed glue is only of trivial strength. It's easy to make a structure that holds together fine on assembly, then collapses under load.
• It has very low yield stress, basically no "give". If there's any movement on a joint (even seasonal movement in a timber frame) then the PU bond will break and crumble, rather than just bending.
• It has minimal UV stability. You might get away with this indoors, but it tends to rule it out for work outdoors.

Overall, it's a pain to use, probably gives a bad result immediately, and will almost certainly fail long-term.

it is definitely not, despite the popular claims. In wet conditions it slowly goes soft and strengthless.

NT

it is definitely not, despite the popular claims. In wet conditions it very slowly goes soft and strengthless. Its fine if it can dry out at times.

NT

Do you mean you used nail polish remover (as I did successfully on my carpet)?

If so does this mean nail polish remover is still acetone, OR that ethyl acetate dissolves PU?

David

SWMBO had some nail poish remover pads which didn't smell like acetone. They had some effect but not brilliant. Daughters stuff smelled like acetone & worked much better.