google PVA Glue ...

from the This to That website    http://www.thistothat.com/glue/pva.shtml

PVA Glues

Plain old white glue

PVA (Polyvinyl acetates) are probably the most common adhesive on the market. They come in a variety of formulas, all ever so slightly different, and specific to what they are designed to glue. Here are some tips for using Polyvinyl acetates.

• All PVAs are designed to work on porous materials only
• PVAs are water based, and clean up with warm soapy water.
• PVA is only toxic to ingest, it does not emit any harmful fumes, and is not hazardous to touch
• PVA sets best in good air circulation, at room temperature.
• PVAs need pressure to adhere, see our info on clamping.
• Most PVAs are not water proof. The yellow PVAs have a higher moisture resistance than the white ones, but neither are completely water proof.
• Never allow your PVAs to freeze. This breaks down the polymers and your glue will be rendered useless!
• Yellow PVAs have a shorter shelf life than white PVAs.
• Be wary of over priced PVAs that claim to be for a specific use. There is very little difference from one PVA to the other, and nothing that should increase the cost.
• Although PVA is not a gap filler, in some cases you can add sawdust to it to increase it's gap filling ability.

I thought PVA was wood glue and white glue was, well, Elmers? Maybe not, but I also build model rockets, and I use wood glue on them for everything, from paper to plastic, and I have had no problems. I think the white glue or wood glue would be fine as long as you have something in the joint to keep it from running out, like stretched sprue or superglue. The wood glue should also be more flexiable, but you might check out the month before lasts issue of FSM. It had an article about gap filling, and it said for hard to fill gaps, try epoxy putty. Good luck!

EdGrune wrote:

Plain old white glue

Technical quibble:

Actually, plain new  white glue. Almost all (there may be a few that are not) "white" or "yellow" water soluble glues these days are PVA. At various points in the past, they were modified acrylic latex, or before that, modified latex. Some PVAs do form a relatively weak, purely adhesive (as opposed to chemical) bond with some plastics. These are the best for gap filling in plastic kits.