: The price and time investment does sound good but I have trouble picturing the resulting product and how it would be secured to the boat. . Have any pictures of a finished seat?
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That is not realistic. It is much easier and faster to make the seat than the
: rest of the kayak -- and you have already made the kayak!

: Making a mold for a kayak seat is as simple as adding water and sitting down.

: For a mold material you can use the expanding foams, but they are rather
: expensive, and get uncomfortably warm as they set up. There are cheaper
: alternatives. The one I suggest most often is what I call the Chicago
: Swimsuit: Concrete. A bag of Sackrete sand mix is about $3 at your local
: hardware homecenter. A plastic garbage bag is a few pennies.

: Place the open garbage bag on the ground, mix up a fairly dry batch of sand
: mix concrete (don't add too much water, jsut enough to barely dampen the
: mix) and dump about 30 pounds of it into the plastic bag. Remove the air
: from the bag and use a metal twister to close the bag.Then sit on the bag.
: Wriggle around a bit, and stand up.

: Now leave the bag alone for a day or two while the concrete hardens, giving
: you a perfect impression of your butt, and providing a fine base for
: laying up a plastic seat which matches your anatomy better than any
: storebought seat ever could.

: If you want a mold which also matches the bottom lines of your kayak, just
: set the boat on a firm surface, put the plastic bag in the boat, add about
: 20 pounds of sand mix to the bag, and sit down for a few seconds.

: Let the concrete mold harden and dry, then apply scraps of fiberglass cloth
: or tape saturated with resin. apply it so the cloth is 2 to 4 layers
: thick. Let that harden for a day and remove it from the concrete. Now
: clean the back of this and try placing it in your boat. Trim any
: overhanging glass and resin while it is still "green". If you
: overtrim, don't worry.

: Add more glass cloth scraps to the back until you are happy with the strength
: of the seat. At this time you can also fix any overtrims. If you want, you
: can stuff foam rubber or minicell under the seat, too.

: A few fill coats on the surface to conceal the weave of the cloth and you are
: done.

: It goes faster than it sounds, and it is easier than you think.

: Just ask those who have done it!

: PGJ