PL in cool temps......

Helpful hints on how to build 'em, and where to get the stuff you need.
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Harley
Posts: 5758
Joined: Mon May 08, 2006 2:45 pm
Location: Christchurch, New Zealand - Authorised BFM Cab Builder

#16 Post by Harley »

Bill Fitzmaurice wrote:. But it won't set worth a damn below 60 degrees.
Well.....it's summer here...you could move. And with the humidity we have here, winters would not pose a curing problem.....and we have Golf Courses you'd die for!

Mo
ImageSemi-retired: Former Australia and New Zealand Authorised BFM cab builder.

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telecast
Posts: 147
Joined: Mon Oct 16, 2006 1:03 pm
Location: Michigan

#17 Post by telecast »

Harley wrote: For the100% expanding polyurethane glues and there was a recommendation - that for quicker curing and a better joint, you dampened the surfaces to be glued.
Yup. Gorilla Glue and the Elmer's poly version both make that recommendation. And it's a good alternative to working in dry conditions in the winter. A quick wipe with a damp rag, then gluing and clamping before the moisture evaporates will take the place of humidity.

I started piddling around after Christmas with my DR's when I get the chance. The horn throats and supports are glued up and cut to size, and the glue joints are very strong. My basement is heated, and like all homes in the midwest with forced air heat and no humidifier, it's very dry. I do need to get my humidifier going again though!

If you look at PL's website, they have a tech sheet. They give a temperature range of down to 20 degrees farenheit provided you warm the adhesive first. They actually show bonding strength when gluing frozen wood! I suppose that's ok for a subfloor, but not something I'd try for speaker building!
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Tom
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#18 Post by Tom »

Keep the tube of PL in the warm house overnight, then dash out and apply it to the cold cabinet. It comes out easy, and cures just fine, at a slower rate due to temp and humidity.

Keep it in a bag, because it wants to come out of the tube all by itself, and you don't want it in the carpet or on the wife's table cloth :oops:

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