Priming MDF boxes

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#382
sploo said:
It has been 9 years. Wow. That makes me feel old 😱

I do still have several of the blocks - though they've lived at the back of my damp garage, so they're not really a good measure of how they'd behave in a home environment. I could dig them out and have a look.

Whilst I've not really done any spraying work for years I have since started using Titebond, which does appear to dry much more hard/brittle than PVA, so I wonder if that might be better.

That said, if I recall correctly, even Cascamite sunk - it was mostly a case of 2k paint working well (which is obviously nasty stuff).
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Even better, I'd be really interested in seeing how they are after being in a damp garage.
 
#390
chrisb said:
Actually many of the major panel manufactures have been moving away from UF based adhesives in their products for quite a few years now - labeling them as NAUF - No Added Urea Formaldehyde

Be aware that the F in that acronym is a naturally occurring organic compound far more prolific than you might think.
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I know a lot of products in Canada have stopped using it, I haven't seen any MDF that doesn't though
 
#391
Where / what brands are you buying? I've worked for a commercial millwork (cabinet) mnufacturer on Vancouver Island for 23yrs, and all of our distributors now carry products by Westpine, Sierra ( now Roseburg), Panasphere, Murphy, States Industries to name the few that immediately come to mind, that offer most of their MDF and particle board core (raw or with factory " melamine" top coats) using resins not containing UF.

Granted, import plywoods and MDFs that might be found at big box retailers are another matter altogether - just try to find country of origin manufacturer name and spec sheets / MSDS info on some of those.

All academic to me, as I've use exclusively either shop grade Russian Baltic birch (5x5) or Europly / Murphy Multi-ply for all my speaker builds, and most others as well for at least 15yrs
 
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