Yes  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       



All Forums >> RC Airplanes >> Tips & Techniques >> Yes Page: [1]

Login
Message << Older Topic   Newer Topic >>
Yes - 7/31/2002 10:22:11 AM   
Lightfoot



Posts: 3224
Status: offline 		I have done this several times and it works fine. Use only denatured alcohol. Rather than mixing equal parts of epoxy and alcohol, use only enough alcohol to thin the epoxy to a liquid state. It takes very little alcohol.
       Post #: 1

epoxy + alcohol? - 7/31/2002 10:44:18 AM   
digger.10



Posts: 222
Joined: 5/31/2002
From: Beaver Dam, WI, USA
Status: offline 		For just a firewall, you probably don't even need to bother with the alcohol, just use 30 minute epoxy and apply with an old toothbrush. Scrape the excess, if any, off with an old plastic card and if it's not smooth enough for you just hit the wet epoxy with a hair dryer, that makes it lay out and gloss up real nice.

(in reply to Lightfoot)
       Post #: 2

epoxy + alcohol? - 7/31/2002 11:21:58 AM   
Rodney



Posts: 4774
Joined: 12/8/2001
From: FL
Status: online 		While many seem to get passable results thinning with alcohol, it is not a good idea. If there is to much water in the alcohol, the result may be a soft or rubbery finish with little strength and; all alcohol will have water in it, even denatured alcohol will absorb quite a bit of water from the air after it has been opened a time or two. The advice to use 30 minute or slower epoxy and then use a heat gun to warm it is a far better solution. The warmed epoxy will seep into any crack or crevices as well and greatly strengthen the firewall area. Just don't heat it so hot that that it bubbles, just enough to make it very thin (you will see it suddenly being absorbed into all the little cracks and crevices). The heat will also speed up the cure and prevent any globs or ridges of epoxy.

(in reply to Lightfoot)
       Post #: 3

epoxy + alcohol? - 7/31/2002 1:46:16 PM   
FHHuber



Posts: 4931
Joined: 1/1/2003
From: gone, , USA
Status: offline 		I avoid mixing alcohol wth epoxy for any purpose. If you are careful about applcation, and have fresh 2 hour epoxy, it goes on thin enough already for fierwall fuelproofing. While you are coating the firewall, If the plane doesn't have cheek cowls, and IF you can peel back the covering a bit, put a layer of .5 oz fibregalss cloth over the firewall and back on the fuselage sides, top and bottom for about 1/4 to 1/2 inch. This will ensure the fuelproofing coat is adequate (by all the glass cloth being saturated and changing from white to transparent) and lock the firewall to the fuselage. The fibreglass will be strong enough to hold the firewall in place even if the ARF manufacturer didn't get enough glue on it.

(in reply to Lightfoot)
       Post #: 4

epoxy + alcohol? - 7/31/2002 3:42:53 PM   
jack01



Posts: 808
Joined: 5/3/2002
From: Memphis, TN, USA
Status: offline 		I've used thin CyA on all of mine, and it works even better. It adds strength to the firewall, and no fuel can get through. Another way to do it is to get some paint and paint it, then spray ClearKote over it.

(in reply to Lightfoot)
       Post #: 5

Page:   [1]
All Forums >> RC Airplanes >> Tips & Techniques >> Yes
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.406RCU1