Repairing fiberglass cowl
11-05-2012, 04:15 PM
#1
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Repairing fiberglass cowl
I have a fiberglass cowl that I need to repair. I have the fiberglass cloth but no resin. Do I have to use resign or is there other stuff I can use, thanks
11-05-2012, 04:42 PM
#4
Senior Member
RE: Repairing fiberglass cowl
Nowadays we what we call a fiberglass cowl could be composed of polyester resin and cloth just like when fiberglass parts first showed up, or they could be composed of epoxy resin and cloth. Just looking at a part nowadays, it's pretty much impossible to be sure which resin was used. You can guess by looking at the damage but that's not necessary.
Usually polyester resin won't stick to epoxy very well. Epoxy resin will stick to both itself and the polyester. So to repair without worry, use epoxy.
Usually polyester resin won't stick to epoxy very well. Epoxy resin will stick to both itself and the polyester. So to repair without worry, use epoxy.
11-05-2012, 04:45 PM
#5
Senior Member
RE: Repairing fiberglass cowl
ORIGINAL: devil505
Would any 2 part apoxy work. I have some harbor freight stuff that is 2 part.
Would any 2 part apoxy work. I have some harbor freight stuff that is 2 part.
Yup
However it's best to use at least 30 minute for best wetting, penetration, and strength.
11-05-2012, 06:58 PM
#7
My Feedback: (-1)
RE: Repairing fiberglass cowl
ORIGINAL: da Rock
Nowadays we what we call a fiberglass cowl could be composed of polyester resin and cloth just like when fiberglass parts first showed up, or they could be composed of epoxy resin and cloth. Just looking at a part nowadays, it's pretty much impossible to be sure which resin was used. You can guess by looking at the damage but that's not necessary.
Usually polyester resin won't stick to epoxy very well. Epoxy resin will stick to both itself and the polyester. So to repair without worry, use epoxy.
Nowadays we what we call a fiberglass cowl could be composed of polyester resin and cloth just like when fiberglass parts first showed up, or they could be composed of epoxy resin and cloth. Just looking at a part nowadays, it's pretty much impossible to be sure which resin was used. You can guess by looking at the damage but that's not necessary.
Usually polyester resin won't stick to epoxy very well. Epoxy resin will stick to both itself and the polyester. So to repair without worry, use epoxy.
11-10-2012, 06:47 AM
#8
RE: Repairing fiberglass cowl
Polyester resin when you sand it will have a "sweet" smell to it. Epoxy will be odorless for the most part. Getting rid of any oil is essential. Epoxy, IMO, is the preferred resin to use to repair. It sticks to itself and polyester well.
Ken
Ken
11-10-2012, 09:04 AM
#9
RE: Repairing fiberglass cowl
ORIGINAL: sensei
Medium CA no kicker and 2-6 oz. cloth works very well for repairs on cowlings and wheel pants, been doing it for years.
Bob
Medium CA no kicker and 2-6 oz. cloth works very well for repairs on cowlings and wheel pants, been doing it for years.
Bob
Been doing the same as well. CA works great on either resin system. The only difference is that I will use the CA to glue the peices back together and then add a single layer of 4 oz cloth to the inside. As otheres have stated, getting the part clean before any repair is key
11-14-2012, 11:27 AM
#12
RE: Repairing fiberglass cowl
The cowl for the Eflite T-34 must be polyester then, I used regular Bondo resin and glass to repair it and it is looking good. Stuck very good to it too.
