John, new canoe owner

Although traditionalists will regard my method as heresy, I use 1/4” thick gray butyl rubber tape under the stem bands. Keep it in a warm place prior to use for ideal squeeze-out. Rather than traditional Dolfinite which is likely messier to apply, the tape sticks to the painted canvas and the release paper backing allows easy handling to position it correctly. Once in position, remove the paper and re-install the stem band. Cut off the excess on both sides of the stem band. Over time additional butyl will squeeze out slowly and the excess is easily ‘cut’ off with the corner of a putty blade or screwdriver. Butyl tape is regularly used to waterproof metal roofing seams over long-term use. I have used this on three restored canoes, all of which are regularly used for multi-day trips. You might also consider gluing in toothpick tips in the old screw holes to give the stem screws additional grip.

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Hi Gil......I know lead can be tough on the nerves , but I think the hatters were having their problems because of the mercury used in treating the beaver pelts used in the making of a luxurious beaver hat. No OSHA in those days .
Dave
 
Dolphinite is the defacto standard but I'm sure there are alternatives. It will dry out in the can, so I tend to buy smaller amounts. Chandler has a very healthy website......that could save you that 2 1/2 hour drive, although Ottawa is a nice visit this time of year.
 
Mike, mine has in the past, was told to put some linseed oil on top. So far so good, man that stuff is expensive....
Sage advice.... I put it into plastic bags and remove as much air as I can from them. Yes, wicked expensive.... it will make you sad to open a can, use it once, come back to it a year later and find it as stiff as your mother in laws mashed potato's.
 
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