William R. Watt wrote:

"Meindert Sprang" ) writes:


Stay away from anything like these PU glues. To make a good bond, you need a
clamping force you will never be able to apply on a boat. 60-80 psi is quite
difficult to apply over a long seam.


could you say where this clamping pressure information comes from? there
is nothing about it in the PL Premium directions. this house construction
mastic form of the adhesive is supposed to work on materials which are
nailed together and for attaching sheets of foam with just a few nails to
hold it in place until the glue cures. I've used it on small glue-ups with
only the weight of a brick to hold the pieces together until it cures.

Meindert is talking about Gorilla, Probond and the other liquid glues.
They all require high clamping pressure to get the best bond. The
construction adheasive You are talking about has a thixotropic filler
and doesn't need that much pressure.

BTW, how do you keep a partial cartrige alive? You don't need a lot to
make a good joint. When you consider spoilage PU works out a lot more
expensive than epoxy. I buy Gorilla in the smallest bottles just to
keep it fresh.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Glenn Ashmore ) writes:

BTW, how do you keep a partial cartrige alive? You don't need a lot to
make a good joint. When you consider spoilage PU works out a lot more
expensive than epoxy. I buy Gorilla in the smallest bottles just to
keep it fresh.

based on information posted in this newsgroup some time ago I wrap in a
plastic bag and freeze it. I've since read in a different newsgoup that
refrigeration(?) works and you don't have to wait for it to thaw. Have not
tested that. I put it in the sun or near a hot air register to thaw an
hour before I want to use it, which requires some planing. a small plug
will solidify in the nozzle. the plug can be extracted with a wood screw.
I've frozen the PL Premium for months.

I also keep "empty" tubes of adhesive and caulking to be cut open and the
dregs dug out with a putty knife or similar for small jobs. There's
actually quite a lot left in there.


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