Subject: ? for Dr. Rot (CPES vs. Git Rot)
Date: Fri, 15 Sep 2000
Dear Dr. Rot,
Nice web site, well done...
We have soft spots under our fibreglass deck on our houseboat, unable to access it from below for repairs so will have to do from above. The fibreglass is still in good shape. At http://www.houseboat.net Capt. Tom on the bulletin board said to someone else's query about a similar problem:
"...There is a much simpler solution than cutting out all the fiberglass
and attempting to replace the underlayment or worse yet working upside down in the hull. There is a product called "GIT-ROT" It comes in a bright yellow box that is a 2-part epoxy. It is available at West Marine or Boater's World. BW price is 16oz. for $20.00. It is temperature sensitive and must
be applied in cooler weather to allow time to infiltrate the wood fiber
before it sets up. Can be refrigerated prior to use, too. You drill 1/4" holes 1" apart on the soft area. DO NOT drill all the way thru the wood underneath!! use a drill stop to prevent this. Mix the solution per instructions and fill the drilled "wells". Thru a capillary action the solution will penetrate through out the soft area. In about 36 hours be as hard as concrete. I am impressed with this product !! A tad expensive but much easier than the work exhaustive alternative of complete cut-outs and large re-glassing repairs..."
From your experience, do your products work better than GIT-ROT, and if
so which ones in particular do you recommend for us. Do you agree with Capt. Tom's procedure above? We live in the interior of BC, (Okanagan Lake) but the temperatures are still in the mid teens or higher during the day.
Thanks for any advice,
If you look at the Testing Section of our website, "Git-Rot" is product "B".
"Git Rot" will work to some extent if conditions are ideal, although in
our opinion a standard epoxy resin with a slow hardener will work as
well. That's basically all that "Git Rot" is. You will note in the Test
Section that of the 6 ml of "Git Rot" applied to the balsa wood, less
than 25% was absorbed.
The basic problem here is that "Git Rot" or a standard epoxy will not
penetrate far enough to give one any confidence that all deteriorated
areas have been saturated, and if they have not been saturated there is
no assurance that the rot process has been deterred. We have seen many
cases where a standard epoxy resin is applied to rotted wood, and
although it gets hard and solves the problem in a particular spot, the
rotting process can and will continue beyond the penetration area of the
You will note that 6 ml of CPES penetrated 16", and when more was added
it penetrated over 20". On wood that is reasonably dry, even if it is
under fiberglass, CPES will penetrate thoroughly. Holes can be 5-7"
apart. With sufficient cure time (about a week) CPES will harden the
wood. If the wood is badly deteriorated, then two applications may be
required. If there is actually missing wood on the interior, then we
recommend that the CPES treatment be followed with an application of our
Layup & Laminating Resin into the same holes. The L&L Resin is VERY slow
setting and will penetrate a long way itself. You can see a
demonstration of this process in our "What's New" section.
The temperatures mentioned relate to the temperature at the time of
application. CPES comes in two formulas, a Warm Weather Formula for temperatures
down to about 50F, and a Cold Weather Formula for temperatures that go
down to 28F.
We only ship directly to our customers, and ship the same day as
ordered. Because CPES is classified as a Hazardous Material, getting it
into Canada is usually done by shipping to a point on the US side of
the border, such as a friend, relative, USPS Center, Mail Box outlet,
etc. We supply NAFTA paperwork so there is no import duty. It can be shipped directly into Canada, but requires shipping charges as well as UPS Brokerage fee along with Canadian Customs Duties/Taxes. See our shipping options into Canada for more information.
Let us know if we can be of further help.