Durall Boat Bottom Paint

 
Renew Your Canoe Using Urethane Teflon Antifouling Boat Bottom Paint

Turbulence eats up energy and can slow down your canoe. It has been known for a long time that a 2-inch scratch on a smooth surface can generate turbulence for 10 or 12 inches as water flows over the scratch. If you have an older canoe, its bottom is probably no longer smooth.

Fairing your canoe bottom is not that difficult and can be done in a few hours with simple hand tools and under $50 in materials. First use a 100-grit sanding sponge or palm sander with purple 3M-type paper to clean the bottom.

Then get out the glazing compound. You can find it at www.boat-bottom-paint.com for $4.98 a tub. You will need one or two tubs for an older canoe. Use the plastic putty knife that comes with the glazing compound right out of the tub with no mixing and fill in all your nicks on the bottom. The glazing does not need to be perfectly flat because it sands easily to flush it up with the existing canoe bottom. Allow the glaze to harden for about 1 hour and sand off with a sponge or palm sander. Then repeat until the bottom is smooth.

Next seal the canoe bottom. You want to use a great non-stick coating like that used on cookware. Cookware coatings are based on the largest molecule known, one that has a lower drag coefficient than ice. This type of coating was first developed by DuPont and marketed under the name Teflon. A good choice is Smooth Sailing Boat Bottom Urethane Teflon Paint which comes in three colors.

Use blue tape to mask off the water line. Then mix the urethane and hardener 3 parts A to 1 part B hardener and apply with a 4-inch mohair 1/4" nap roller. A good technique is to just pour a little urethane on the bottom and then wet the roller, spreading the urethane out as thin as possible. By the time you get to the end of the canoe, you probably can start over with your second coat. If you see some bubbles as you go, just roller over again to break them.

After two coats (about 400 cc of material), let it harden for 5 hours, sand off problems, and do your final coat. If drips over the mask or on the side of the canoe occur, just wipe off with thinner while the urethane is still wet. Note that you should get your final coat on within 10 hours of the first coat to assure good adhesion. If you get any orange peel or if the bottom is not as smooth as you like, get out that wax orbital buffer and some light rubbing compound to smooth down to that perfect glass finish.

Click images
to enlarge

Original surface of canoe
Original surface

After first glaze of the canoe bottom
First glaze

After sanding the first glaze
After sanding

First coat of urethane teflon paint
First coat

Second glaze
Second glaze

Final result
Final result

 

 

Smooth Sailing, Inc.  |  102 North Street  |  Hudson WI 54016
Email:
info@boat-bottom-paint.com   |  www.boat-bottom-paint.com
Telephone: 612-226-5200