Home
FAQ
Rules
Search
Register
Log in
Log in
Search
Latest topics
» Anyone recognize this model airplane?by NEW222 Today at 1:45 pm
» Boasting or sharing.......
by balogh Today at 1:41 pm
» cox tee dee 010 pulling a Roaring 20 I have reconstructed after the previous one was lost
by balogh Today at 1:35 pm
» Pee Wee Horseshoe back plate
by Jason_WI Today at 12:50 pm
» Mis-anodized .049 crankcases and 8cc Stunt tanks
by crankbndr Today at 11:53 am
» How's the weather?
by Dave P. Today at 10:52 am
» '65 Corvette
by getback Today at 10:20 am
» Anybody know what cylinder this is?
by getback Today at 10:18 am
» Modelling clay - Got a better idea?
by KariFS Today at 8:01 am
» Cox spinners on APs and Norvels.
by Surfer_kris Today at 3:59 am
Cox Engine of The Month
February-2019
balogh's
"Black Lynx .049 with a Throttle, Exhaust Deflector and Nelson-Galbreath head set"
PAST WINNERS
balogh's
"Black Lynx .049 with a Throttle, Exhaust Deflector and Nelson-Galbreath head set"
PAST WINNERS
CEF Traveling Engine
Win This Engine!
The Traveling Prop
World of Aviation
2 part epoxy
Page 1 of 1 • Share •
2 part epoxy
oldguy on Tue Dec 27, 2016 4:05 pm
Hello guy's, is there something I can add to the 2 part epoxy to thin it out, so I can brush it on easier?
thanks.
thanks.
oldguy- Gold Member
- Posts : 232
Join date : 2015-12-10
Age : 64
Location : arizona 
Re: 2 part epoxy
Cribbs74 on Tue Dec 27, 2016 4:16 pm
No problem, to be more specific denatured alcohol. Acetone works as well. Both of these will weaken the epoxy somewhat.
The very best method would be heat. It doesn't weaken the bond and it flows like a thin syrup. You could use a heat gun or a double boiler.
The very best method would be heat. It doesn't weaken the bond and it flows like a thin syrup. You could use a heat gun or a double boiler.
Cribbs74- Moderator
Posts : 10192
Join date : 2011-10-24
Age : 44
Location : Tuttle, OK-
Re: 2 part epoxy
NEW222 on Tue Dec 27, 2016 5:07 pm
Cribbs74 wrote:No problem, to be more specific denatured alcohol. Acetone works as well. Both of these will weaken the epoxy somewhat.
The very best method would be heat. It doesn't weaken the bond and it flows like a thin syrup. You could use a heat gun or a double boiler.
I have not done either method yet, but is it true that if heating it to flow, it also makes it 'kick' a bit faster than what it is rated for? This is just something I have read, but not yet tried myself. As well, I read in the same place not to dilute with alcohol or Acetone more than 10%? Also watching this thread. Thanks.
NEW222- Diamond Member
- Posts : 1835
Join date : 2011-08-13
Age : 40
Location : oakbank, mb -
Re: 2 part epoxy
Ken Cook on Tue Dec 27, 2016 5:41 pm
Bob Smith Finish - Cure is a 20 min resin that's very thin. It works well for lightweight glass.
Ken Cook- Top Poster
- Posts : 3377
Join date : 2012-03-27
Location : pennsylvania -
Re: 2 part epoxy
akjgardner on Tue Dec 27, 2016 6:03 pm
I used alcohol thined epoxy on a pair of 1/2A floats . It worked very well , but the drying time is a lot longer then the epoxy without being thined
akjgardner- Platinum Member
- Posts : 811
Join date : 2014-12-28
Age : 59
Location : Milan Indiana -
Re: 2 part epoxy
pkrankow on Tue Dec 27, 2016 7:36 pm
Be careful heating fast epoxies, the reaction can become quite energetic. Smoking even. Slow epoxies respond better to thinning via heat.
Solvent thinning works well if a some strength loss is OK. There are quite a few solvents that will work well. I have used acetone and denatured alcohol myself. For fast epoxies (less than 15 minute) solvents are the only practical way to thin.
"Instant" epoxies do not thin well, but that is part of the 1 minute or less kick time. These usually have a mixing nozzle with the double tube.
Phil
Solvent thinning works well if a some strength loss is OK. There are quite a few solvents that will work well. I have used acetone and denatured alcohol myself. For fast epoxies (less than 15 minute) solvents are the only practical way to thin.
"Instant" epoxies do not thin well, but that is part of the 1 minute or less kick time. These usually have a mixing nozzle with the double tube.
Phil
pkrankow- Diamond Member
- Posts : 2975
Join date : 2012-10-02
Location : Ohio -
Re: 2 part epoxy
andrew on Tue Dec 27, 2016 8:30 pm
I have always coated firewalls and other areas that are exposed to raw fuel with epoxy. I use 30 to 45 minute cure times because it gives more work time and I think the longer cure epoxies are less brittle than the 5 minute or instant epoxies. That said, I prefer heat for thinning. After applying to the areas, I use a monokote gun to warm the epoxy to the point it begins to run slightly. This lets me move it over the part and into the crevices and joints where necessary. If it is a plywood firewall, the epoxy will actually begin to soak into the wood and when set, leave a smooth, glass like finish.
andrew- Diamond Member
- Posts : 1235
Join date : 2011-08-11
Age : 71
Location : Western Kentucky -
Re: 2 part epoxy
oldguy on Tue Dec 27, 2016 8:50 pm
andrew wrote:I have always coated firewalls and other areas that are exposed to raw fuel with epoxy. I use 30 to 45 minute cure times because it gives more work time and I think the longer cure epoxies are less brittle than the 5 minute or instant epoxies. That said, I prefer heat for thinning. After applying to the areas, I use a monokote gun to warm the epoxy to the point it begins to run slightly. This lets me move it over the part and into the crevices and joints where necessary. If it is a plywood firewall, the epoxy will actually begin to soak into the wood and when set, leave a smooth, glass like finish.
That is what I was going to do with it fuel proof some areas.
Sounds good.
oldguy- Gold Member
- Posts : 232
Join date : 2015-12-10
Age : 64
Location : arizona -
Re: 2 part epoxy
RknRusty on Wed Dec 28, 2016 12:16 am
I just use a paint brush and dip it in acetone, then pick up the epoxy with the dripping wet brush and slather it on.
Or, a couple of heavy coats of Minwax polyurethane goes on easier and is pretty super fuelproof too. The pint cans are cheap. For LG holes, screw/bolt holes, etc., I also use a toothpick or a little dental cone brush(meant for flossing between the teeth) dipped in polyurethane too. It really soaks in good inside those bored holes and doesn't foul any threaded inserts or t-nuts as bad as epoxy can.
Rusty
Or, a couple of heavy coats of Minwax polyurethane goes on easier and is pretty super fuelproof too. The pint cans are cheap. For LG holes, screw/bolt holes, etc., I also use a toothpick or a little dental cone brush(meant for flossing between the teeth) dipped in polyurethane too. It really soaks in good inside those bored holes and doesn't foul any threaded inserts or t-nuts as bad as epoxy can.
Rusty
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Moderator
- Posts : 10670
Join date : 2011-08-10
Age : 62
Location : South Carolina, USA -
Re: 2 part epoxy
rsv1cox on Wed Dec 28, 2016 7:17 am
RknRusty wrote:I just use a paint brush and dip it in acetone, then pick up the epoxy with the dripping wet brush and slather it on.
Or, a couple of heavy coats of Minwax polyurethane goes on easier and is pretty super fuelproof too. The pint cans are cheap. For LG holes, screw/bolt holes, etc., I also use a toothpick or a little dental cone brush(meant for flossing between the teeth) dipped in polyurethane too. It really soaks in good inside those bored holes and doesn't foul any threaded inserts or t-nuts as bad as epoxy can.
Rusty
Pipe cleaners work well too for protecting LG and fuel line holes. Use the ones that do not have wires embedded. Walmart has them at the tobacco register. They clean out head, case, and mounting holes too. Use the tapered wire embeds for this task.
http://www.ebay.com/itm/B-J-LONG-TAPERED-STANDARD-PIPE-CLEANERS-100-BAG-/221791832518?hash=item33a3d2c9c6:g:K38AAOxy0NtTCe0q
http://www.ebay.com/itm/100-Pieces-White-12-Long-Chenille-Pipe-Gun-Cleaner-6mm-Stems-/161583506224?hash=item259f20a330:g:DJMAAOSwYGFUzzKJ
Bob
rsv1cox- Top Poster
- Posts : 3703
Join date : 2014-08-18
Location : West Virginia -
Re: 2 part epoxy
getback on Wed Dec 28, 2016 9:55 am
Cool , i haven't thought of this as i been using toothpicks and Q tips , i use to smoke pipes too . Bob your hitting a all around high for new ideas ; Keep um coming !! 
getback- Top Poster
- Posts : 5443
Join date : 2013-01-18
Age : 61
Location : julian -
Re: 2 part epoxy
fredvon4 on Wed Dec 28, 2016 11:22 am
I build a lot of mostly Profile planes...
I use a hole punch with Blue painter tape to make a round DOT to keep Epoxy, primer, and paint out of the engine bearer and LG holes ---but I do always add thin CA to the hole
Some here may remember my query about a good CA glue that kicks off instantly......slow curing CA in a HOLE is as bad as Epoxy in the hole
Nice, thin, Instant setting CA, is mucho prefered and I am still having trouble getting any that smokes!!!
I use a hole punch with Blue painter tape to make a round DOT to keep Epoxy, primer, and paint out of the engine bearer and LG holes ---but I do always add thin CA to the hole
Some here may remember my query about a good CA glue that kicks off instantly......slow curing CA in a HOLE is as bad as Epoxy in the hole
Nice, thin, Instant setting CA, is mucho prefered and I am still having trouble getting any that smokes!!!
fredvon4- Diamond Member
-
Posts : 2654
Join date : 2011-08-26
Age : 63
Location : Lampasas Texas -
Similar topics» 2K Epoxy Primer
» 30min epoxy
» Third part of Naruto?
» Epoxy Bomb Goes Under the Knife...er...OVER The Table Saw !!!!!!!!!!!!!!!!!
» Removing dried Epoxy
» 30min epoxy
» Third part of Naruto?
» Epoxy Bomb Goes Under the Knife...er...OVER The Table Saw !!!!!!!!!!!!!!!!!
» Removing dried Epoxy
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum