both TB lll & PL Premium benefit from dampening the wood when making waterproof joints
TB lll shrinks during it's curing process it doesn't fill any imperfections in the process and it REQUIRES tight pressure in good fitting joints during the curing stage
PL Premium expands a bit during the curing process filling slight imperfections and as stated above REQUIRES tight pressure(clamped/screwed like the dickins)while curing to prevent the glue from moving the parts during the process
my comments are based on a duplicate boat build last year when i created 2 identical small boats(from big box store products instead of "marine" products) where one was built w/ TB lll and the other using PL Premium 3x
attention was paid to dampening all joints and the use of enough glue to produce OOZE all along both sides of every joint
both boats floated nicely w/ NO LEAKS
the TB lll boat did require some attention with calking in places where the glue shrunk(even after oozing) leaving slight voids whereas the PL Premium boat's joints all had to be trimmed prior to finishing
my conclusion was that THICKENED EPOXY(i've been involved in several boat builds over the last few years where all products were "marine grade") is by far the best bonding agent where/when WATERPROOF and LONGEVITY are paramount
the epoxy process requires unthickened epoxy to be applied to both surfaces just prior to applying the thickened product to prevent joint starvation as the bond cures
a couple of reasons include... you can get epoxy w/ different drying time hardeners(i like the tropical slow stuff because it provides this old man enough time to work a seam/joint single handed) AND thickened epoxy will fill imperfections AND when coated w/ a UV inhibiting product(paint or varnish) IT IS WATERPROOF forever
the above coment about epoxy failing under ADV trailer conditions is a non issue IMHO
more likely the wood would be pulled apart before the epoxy would fail
DUCKWORKS BBS is a great source for quality epoxy products at economical prices
http://www.duckworksbbs.com/category-s/254.htmGOOD LUCK W/ YOUR BUILD
sw