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
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