> Go to the local gun store or shotgun range and buy some lead shot used to
> reload shotgun shells. It comes in 25-pound heavy-canvas bags. They're
> great for holding down parts being glued in the middle of large flat
> surfaces. Be sure to put a piece of plastic sheet between the part and the
> bag so the canvas doesn't get glued to your kayak. Its not cheap, new shot
> will cost about $16 a bag. If the range sells reclaimed shot it will be
> about half the cost of new.

Dave,

I did the same thing except with play sand. I filled three zip lock bags right from the kid's sandbox and stacked them on my scarf joints. It worked fairly well, however next time I'll use staples. BTW, wax paper works well between layers too.

Happy Boatbuilding

John