Newbie Okwata Questions

[jem]

The "official" answer would likely have to come from the epoxy vendor.

However, my guess is that it is not compatible.

Check out this article about an adhesive made for that specific purpose: http://www.adhesivesmag.com/Articles/Fe ... 0000723421

I submitted an info request to system three to see what they say.

[jem]

Wow they responded fast. Here's what they said:

Matt:

It would be a terrible idea. Nonetheless it is creative thinking on your
part. Problem is that you'd end up with an area with a weak bond. Hold the
glass in place with pieces of masking tape until it is wet out with resin.
Remove the tape right before you get to it with the epoxy. Let us know if
you are working upside down as we have some suggestions for this.

Kern

[CC TX]

I have applied epoxy to the surface to be glassed, let it set up until it is tacky, lay out the glass; and, then wet out the glass with epoxy. Worked well for me. It stayed in place very well. One caution: you will only have one chance to lay out the glass on the tacky epoxy; you probably won't be able to reposition it.

[rodot]

It would be a terrible idea. Nonetheless it is creative thinking on your
part. Problem is that you'd end up with an area with a weak bond. Hold the
glass in place with pieces of masking tape until it is wet out with resin.
Remove the tape right before you get to it with the epoxy. Let us know if
you are working upside down as we have some suggestions for this.

Kern[/quote][/quote][/quote

I have often wondered about the integrety of this bond myself but it is a tried and used method in the application I mentioned. I wont be using this method myself when building the kayak, but when I get a chance I would like to do some kind of test just for the heck of it. The bond, to be successful, would have to be as strong as the ply laminations I would imagine.
Roger

[jem]

I think what it might do is block the epoxy from touching the wood, in the small spots the adhesive droplets are. The heavier the coat, the larger the spot.

[rodot]

I think what it might do is block the epoxy from touching the wood, in the small spots the adhesive droplets are. The heavier the coat, the larger the spot.

Just a fine spray of contact adhesive is used, not enough to clog the mesh of the cloth. I do not know of any failures. I have always managed to crash my planes through other means. Probably thats why I now prefer kayaking.

Having said that, it is always best to follow the manufacturers advice because thier knowledge on the matter is always much greater then ours. They will always tend to err on the conservative side, however, but thats not such a bad thing. I wont be using any spray adhesive on a kayak unless someone can demonstrate to me that they have done it successfully.

Roger

[_AL_]

The spray contact adhesive will work but be warned it will make the glass turn white when dry so don't use it if you want to use a natural wood finish.
If painting, no issues.

Al

[jem]

I don't think the concern is clogging the weave, but sort of masking off the wood from the epoxy with the droplets of adhesive.