1. Home
  2. Model rockets forum
  3. Fiberglassing tubes?

Fiberglassing tubes?

Need help on some info about glasing a tube. I have to work on a very tight budget and can get polyester resin for about 8.00 a quart but epoxy resin costs around 37.00 a quart. So I have to go with the polyester. My question is after the polyester has cured if i use epoxy for the fillets will it effect the polyester? any in put can only help. thanks

Reply to
clucas
Loading thread data ...

As long as you sand the polyester resin down a bit*, it should be fine.

G.

  • can't remember if it's the release agent used with polyester resin or the resin itself that leaves a slightly waxy residue which epoxy doesn't like. My money's on the release agent though.
Reply to
Graham

Epoxy lamenating resin doesn't have to cost 37$ a QT. Try this link

formatting link
've used this epoxy before with good results. Polyester will not give the same added stifness that epoxy will. Gary Deaver

Reply to
Deaver

There is data about the strength of poly vs Epoxy at :

formatting link
to bottom.

The can of poly I have says on it to not put epoxy over it. Also poly has a shelf life. It is very stinky so only use it outside or with a vacuum bag.

It comes in two types. One is a laminating type that does not have the waxy coating for doing multiple layers. I suppose the type you are looking at will have a waxy coating that would need sanding.

You could try letting it dry at least a week before using epoxy to bond to it.

RDH8

Reply to
Robert DeHate

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.