Am using cotton canvas as a covering. What would work best for coating the canvas to keep it waterproof and possibly UV resistant?
lots of pictures
SOF building pictures and info
...they typically coat canvas with oil-based paint. If you use several coats, you can achieve a smooth finish that looks almost like fiberglass.
The kayaks built in the pictures shown here:
were finished by first using a linseed oil primer coat, linseed oil house paint thinned with 10 to 15 percent linseed oil.
For the finishing coats, 5 or 6, we used linseed oil house paint straight, relatively thin coats. To get a smooth finish you sand between coats to get rid of the nap in the canvas.
Is there a common name for Butyrate dope?
I’m not sure about using linseed oil because I want to be able to fold up the canvas for transport. Would this make the skin too inflexible? Or would it crack?
Saw this product referenced on either kayakforum or qajaqusa, can't remember which:
It's a one-part flexible polymer that sounds pretty good. Also, there is the two-part urethane coating available from Spirit Line, which is what I used on my sof, which is covered in ballistic nylon, not cotton:
There's lots of information on Tom Yost's site as well:
You can’t fold finished canvas…
...as the finish will crack, whether it's dope or paint. If you want to do that, you need to use a material like Hypalon or PVC. See the link to Tom Yost's site below for details.