Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Re: CURING time btwn epoxy layers
By:Paul (Minnesota) Jacobson
Date: 6/4/1999, 1:04 pm

> Next time you glass make up a scrap sample and peel the glass off after an
> hour or two or three. It is not that hard. Now that you have it off put it
> back in place. Its not that hard. After a full week of curing try again.
> Still comes off easy. Somehow you messed up the bond. An exageration but
> it shows the point.

> My point exactly. If you can not tell, don't do it.

> If you look hard, you can see the glass move. The problem is that most
> people don't look. Squeege your glass and watch as the glass moves under
> the squeege. The glass moves down and then back up thru the epoxy. For
> fresh epoxy there is no problem. For epoxy past its pot life (we are
> talking in that range) you will break bonds. When the problem becomes
> important, depends on too many variables to comment on.

> Pete Rudy makes tha claim that there are not piles of boats with laminate
> failures around. WE HAD THAT DISCUSSION LAST YEAR. There are a bunch of
> those boats lying around. The specific cause is usually unknown.

George, I was thinking of lateral movement, but you may be right about the vertical movement (relative to the plane of the glass). Thanks for the clarification.

Messages In This Thread

Re: CURING time btwn epoxy layers
Paul (Minnesota) Jacobson -- 6/4/1999, 1:04 pm