Bison Pu Max Timber, liquid polyurethane adhesive

[vann]

PL is simply not available here, but I just bought Bison Pu Max Timber liquid polyurethane adhesive.

"1-part polyurethane adhesive, which sets hard under the influence of atmospheric and/or material moisture. "
Sounds same as PL, I've been through technical datasheets of both adhesives and they have similar properties. Bison is renown adhesive brand here in Europe... I hope this is suitable substitute for Loctite® PL Premium® Adhesive.

If anybody have some experience with this adhesive, it would be comforting to hear about it.


P.S. Will 1 bottle of 750g (26.5 ounce) suffice for THT box building?

[Greg Plouvier]

PL doesn't set hard and is thicker like caulk so it's better at sealing joints. The bison should be plenty strong - just take care to make sure it seals everything well. Can you get the Liquid Nail poly there?

[Harley]

PL is simply not available here, but I just bought Bison Pu Max Timber liquid polyurethane adhesive.?

I've tried that stuff and it's a recipe for leaks.

The problem is that it seeps away from the joints being honey like in consistency. You have to have the joints dead level.

It's almost impossible to guarantee a leak free joint all the way along.

I know you said PL is not available where you are but surely you are able to get a PL equivelent from somewhere or import it from the likes of Leland at www.speakerhardware.com.

It does not have a dangerous goods classification so it can be shipped anywhere.

[Bill Fitzmaurice]

It does not have a dangerous goods classification so it can be shipped anywhere.

+1, probably including the OPs location. On that note 'Orbis Terrarum' is cute in a juvenile sort of way, but it's not going to get you any advice from fellow countrymen who might have already found a source for appropriate adhesive.

[vann]

PL doesn't set hard and is thicker like caulk so it's better at sealing joints. The bison should be plenty strong - just take care to make sure it seals everything well. Can you get the Liquid Nail poly there?

Unfortunately no, I guess it's an US brand.

Even if Bison sets hard it's still polyurethane and listed as having gap filling properties... I guess it should still be much better than standard carpenters glue, polyvinyl acetate (PVA)?

I've tried that stuff and it's a recipe for leaks.
The problem is that it seeps away from the joints being honey like in consistency. You have to have the joints dead level.
It's almost impossible to guarantee a leak free joint all the way along.

I know you said PL is not available where you are but surely you are able to get a PL equivelent from somewhere or import it from the likes of Leland at http://www.speakerhardware.com...

Damn... if possible I'd really not import adhesive, as my budget is already broken I already bought this (was the most expencive wood glue in store)
Allready had to import the DVC subwufer driver and it seems I'll have to import plywood too...

If I use battens as in pic bellow, will it do a passable job to avoid leaks?

[wounded horse]

I'll find out how much total cost is to send you the right adhesive + shipping to Macedonia. This isn't a corner you want to cut. Hang on there for a couple of days.

[vann]

That's very kind of you mate, but it's never so simple here.
Thing is, if I order something via air shipping (FedEx or UPS), I get to bear ridiculous (and unavoidable) airport custom taxes.
If I dear to use ground shipping via postal office, there's big chance I won't get the shipment. Because someone from the post office will steal it. Happens all the time here. It might sound ridiculous to you but that's the way things are here... it's wilder then the original Wild West.
The only reliable way to get something from abroad is via FedEx/UPS (way too expensive) or when a mate is coming back home from US/Europe (not often).
And to answer Bill, this is why I usually don't write my location... I always get to explain why a simple mail order is so complex in the god forsaken state of Macedonia.

It was mistake not to order the adhesive when I ordered that 15" Dayton sub (which took more than trice it's price to get it here), I simply never thought the right adhesive will be so hard to find.


The local DIY ppl I consulted here always use regular carpenters glue (standard polyvinyl acetate (PVA) kind of wood glue) and than insulate the inner chambers of loudspeaker boxes with bitumen (both to dampen the box and to fill any leaks).
BTW can maybe the inner box edges be treated with silicon to fill any gaps present?

[Bill Fitzmaurice]

The main issue is getting a perfect seal when applying the second side. With PL it's no problem. If an internal joint does leak you can't get at it to fix it.

[Gregory East]

Have another look at your builders merchant store. The stuff you need isn't the most expensive woodworker's glue. It's what they use to stick flooring down. Expanding polyurethane.

Otherwise it'll be worth it to have a single tube surface posted from somewhere in Europe rather than US airmail. No such thing as US surface international mail these days. I wouldn't think a single tube of "wood glue" would be of much interest to mailroom thieves.

[wounded horse]

What about something sent in from Greece? I have a friend on Kefalonia.

[Harley]

Otherwise it'll be worth it to have a single tube surface posted from somewhere in Europe rather than US airmail..

It's most likely because the glue sniffers are attracted to it rather than where it originates from

[Rune Bivrin]

As an alternative, at least for the last side that is the biggest problem because it's uncaulcable, you could try to use PU insulation foam in a spray can. It expands pretty well (like 5-6 times ). Not sure about the strength, but combined with brads or screws it should be good. It's probably a bit difficult to control the amount, however.

[Harley]

As an alternative, at least for the last side that is the biggest problem because it's uncaulcable, you could try to use PU insulation foam in a spray can..

Sorry but that's that's definitely a no-no. It has very little boning strength. Sure it sticks to surfaces like baby poo to a blanket, but it's not an adhesive - it's a gap filler.

Expanding 100% polyurethane is an adhesive which achieves its strongest bond through compression ( claps or screws ) and moisture during the curing process. Because it expands, it fills any small gaps so it acts like a gap filler for those situations.

Even if it could act as an adhesive, PU insulation foam has far too greater of an expansion rate and for what we do, it's uncontrollable.

[UROK]

Sorry but that's that's definitely a no-no. It has very little boning strength.

Now, I got too much class to touch that line!

[vann]

I've contacted Bison's tech support with inquiry about this adhesive's expanding (gap filling) properties. And asked if there is any other adhesive from Bison that meets my requirements better than this particular adhesive.

I've also checked http://www.speakerhardware.com. Damn, PL in 10.6oz bottle for 4 bucks? I paid more than $25 for 26oz bottle of that Bison polyurethane adhesive.

What about something sent in from Greece? I have a friend on Kefalonia.

Again it's very kind of you, but to postal thiefs it wont make difference where it's sent from. Unless your friend is making a trip to Macedonia (doubtful considering the huge economic crisis going on in Greece ATM).

Have another look at your builders merchant store. The stuff you need isn't the most expensive woodworker's glue. It's what they use to stick flooring down. Expanding polyurethane.
Otherwise it'll be worth it to have a single tube surface posted from somewhere in Europe rather than US airmail. No such thing as US surface international mail these days. I wouldn't think a single tube of "wood glue" would be of much interest to mailroom thieves.

I've been through all bigger shops in our capitol city, the only available adhesive that even mention being based on polyurethane polymer is the above stated Bison glue.

I guess I'm boring you all, but believe me, importing anything via air shipment invokes flat airport storage fee of 50euro (around $70) even if I manage to pick it up the same day it arrives. I also have to hire services of expediter service (legal requirement) which is starting from 50euro. So that's around $140 without even considering the air shipment fee and the adhesive's price.
I don't want to even start talk about the living standards here (average monthly salary being less than $350). I'm quite lucky to have a very well paid job in the IT industry, or I wouldn't be able to even dream of having such expensive (for Macedonia's standards) DIY hobby.