Fiberglassing with Bondo brand resin  
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Fiberglassing with Bondo brand resin - 11/29/2007 9:16:59 PM   
tenacious101010


 

Posts: 257
Joined: 9/20/2004
From: Tampa, FL, USA
Status: offline 		I have read many posts about glassing but have a very basic question. I have a quart of "Bondo" brand fiberglass resin that I bought at an auto parts store, will this work to glass a plane?
Thanks, Denny
       Post #: 1

RE: Fiberglassing with Bondo brand resin - 11/29/2007 9:56:29 PM   
dreadnaut



Posts: 625
Joined: 3/13/2004
From: Vista, CA, USA
Status: offline 		If you are glassing over a wood frame it will probably work. Bondo products are, to the best of my knowledge, polyester resins. For laying up composite molded fuselages etc. Epoxy resins, like West System, and MGS are prefered. Among polyester resins, some are called finish resins, or laminating resins. You definatly want to use laminating resin. Also, do not try to use polyester resins if the temperature of your workspace is below 70 degrees F. It will not cure properly.

(in reply to tenacious101010)
       Post #: 2

RE: Fiberglassing with Bondo brand resin - 11/30/2007 2:47:39 AM   
Spike


 

Posts: 72
Joined: 12/15/2001
From: Saint Paul, MN, USA
Status: offline 		I'm very far from an expert on this but I thought that for fiberglass covering for painting that you wanted a finishing resin. My understanding is that the laminating resins stay tacky.

(in reply to dreadnaut)
       Post #: 3

RE: Fiberglassing with Bondo brand resin - 11/30/2007 4:56:33 AM   
combatpigg



Posts: 9255
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		Auto parts store and hardware store resin isn't low enough viscosity for good results, unless you are building a RC tank. Buy the good stuff from a specialty supplier. You can cure polyester resin in a hot box made from styrofoam or cardboard and use light bulbs for heat. Finishing [casting] resin is what I use to laminate .6 oz cloth on balsa, it sands better than laminating resin. It is a good idea to apply a thin coat of resin on the bare wood and sand it before doing the laminating of the cloth.

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(in reply to Spike)
       Post #: 4

RE: Fiberglassing with Bondo brand resin - 11/30/2007 5:05:00 AM   
bigtim


 

Posts: 2225
Joined: 5/31/2004
From: san francisco, CA, USA
Status: offline 		Denny it really depends on how big your plane is,if your glassing a plane then you want to use as little as possable to wet the glass so your not adding too much weight to your model,for glassing models your better off with a model specific product like Z-poxy,or a water based polyurathane,the WB Poly is a easy way to glass needing no catalyst, for hardening/drying as well as low odor.
having done my fair share of fiberglass work its smelly messy stuff that can be trouble to work with,if your not totally in control of the material you can turn your model into a brick in no time.
the Z-poxy and WB has alot of advantages,I prefer the WB and have had much success using it for 15$ you can get a QT of satin Varathane Diamond finish at Home depot,and save yourself the headache.

(in reply to Spike)
       Post #: 5

RE: Fiberglassing with Bondo brand resin - 11/30/2007 1:22:08 PM   
TFF


 

Posts: 568
Joined: 10/30/2006
From: Memphis, TN, USA
Status: offline 		It is thick and heavy. The same made for model use is thinned(at manufacture). It was great in the 70's but time has passed it by with better ways.

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       Post #: 6

RE: Fiberglassing with Bondo brand resin - 11/30/2007 2:22:50 PM   
dreadnaut



Posts: 625
Joined: 3/13/2004
From: Vista, CA, USA
Status: offline
quote:

ORIGINAL: Spike

I'm very far from an expert on this but I thought that for fiberglass covering for painting that you wanted a finishing resin. My understanding is that the laminating resins stay tacky.



My bad. Spike an combatpigg are correct, and I had a brain fart.

(in reply to Spike)
       Post #: 7

RE: Fiberglassing with Bondo brand resin - 11/30/2007 4:00:11 PM   
daven



Posts: 6649
Joined: 12/7/2001
From: Andover, MN, USA
Status: online 		I use laminating resin for fiberglass all the time as I normally buy it by the gallon. It does not remain tacky, and gives me a great finish. Finishing resin dries with a waxy surface that some feel is easier to sand and give a good finish, but laminating resin works just fine.

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(in reply to dreadnaut)
       Post #: 8

RE: Fiberglassing with Bondo brand resin - 12/1/2007 1:22:58 AM   
tenacious101010


 

Posts: 257
Joined: 9/20/2004
From: Tampa, FL, USA
Status: offline 		Thanks to all who have given input to this thread. I have used the "Bondo" brand and other brands of Fiberglass on a wide variety of projects, none of them were especially weight critical, this was my main concern, I know it will harden sufficiently, will sand well and will be strong. I have a giant TBM Avenger I will try it on before I decide whether to use it on my other projects.
Thanks again to all that have shared opinions and experiences, Denny

(in reply to daven)
       Post #: 9

RE: Fiberglassing with Bondo brand resin - 12/1/2007 2:28:49 AM   
aa2dd


 

Posts: 335
Joined: 5/25/2004
From: Frostproof, FL, USA
Status: offline

I have used Bondo resin & light weight glass cloth for lining the inside of the cowl and also wheel pants for extra strength on my Giant Aeromaster

Bruce

(in reply to tenacious101010)
       Post #: 10

RE: Fiberglassing with Bondo brand resin - 12/1/2007 5:23:24 AM   
Spike


 

Posts: 72
Joined: 12/15/2001
From: Saint Paul, MN, USA
Status: offline
quote:

ORIGINAL: daven

I use laminating resin for fiberglass all the time as I normally buy it by the gallon. It does not remain tacky, and gives me a great finish. Finishing resin dries with a waxy surface that some feel is easier to sand and give a good finish, but laminating resin works just fine.


Dave,

Good to see that you're still around and in the RC scene.

(in reply to daven)
       Post #: 11

RE: Fiberglassing with Bondo brand resin - 3/4/2008 6:40:38 PM   
john132


 

Posts: 18
Joined: 1/14/2008
From: claremore , OK, USA
Status: offline 		I am using the bondo type resin on my yellow aircraft f4 wings and so far it is working well. Will post at a later date what the finished product turns out like.

(in reply to Spike)
       Post #: 12

RE: Fiberglassing with Bondo brand resin - 3/4/2008 8:26:38 PM   
wkevinm


 

Posts: 139
Joined: 9/17/2004
From: Sherwood Park, AB, CANADA
Status: offline

Unless it has changed Bondo is a polyester resin with filler material mixed in. It has a high viscosity and is meant to be used for filling dents and imperfections in automobiles, can be used for creating molded components, it is heavy and not designed as a laminating resin.

Kevin M

(in reply to john132)
       Post #: 13

RE: Fiberglassing with Bondo brand resin - 3/4/2008 8:34:10 PM   
tenacious101010


 

Posts: 257
Joined: 9/20/2004
From: Tampa, FL, USA
Status: offline 		Kevin, Bondo is a brand name. That company makes several products including body filler and fiberglass resin among other things. "BONDO" is often used to describe many manufacturers polyester body filler.
Denny

(in reply to wkevinm)
       Post #: 14

RE: Fiberglassing with Bondo brand resin - 3/4/2008 9:00:58 PM   
jeffk464


 

Posts: 1239
Joined: 10/31/2004
From: cerritos, CA, USA
Status: offline 		I tried using it before and had a problem with the 15 minute set time. I really didn't have time to do what I needed.

(in reply to tenacious101010)