best way to remove unset epoxy
Moderators: Bill Edmundson, ttownshaw
best way to remove unset epoxy
I am using system 3 epoxy to encapsulate. I mixed a 2-1 ratio using a scale to measure, Mixed for over 1 minute, and coated my stringers. It has been 2 weeks and is still sticky. I have resigned myself that I have to remove it and start again. What is the best way to remove the old epoxy? ( by the way, I didn't mix enough in my first batch and had to mix a second batch. That area has hardened in 1 day)
Bryan
Bryan
Bryan
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Re: best way to remove unset epoxy
could be it just blushed real bad if so soap and warm water will clean it if not acetone will remove it and if you don't want to use a chemical you can use vinegar
Re: best way to remove unset epoxy
Thanks, I will try the vinegar. But why would 1 batch blush and the other not?
Bryan
Bryan
Bryan
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
- Bill Edmundson
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- Joined: Wed Nov 23, 2005 6:45 am
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Re: best way to remove unset epoxy
Blush changes a lot with temperature and humidity.
Bill
Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build
Tahoe 19 Build
Re: best way to remove unset epoxy
The two areas were done at the same time. About 5 minutes apart. So wouldn't be different humidity.
Bryan
Bryan
Bryan
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
- Bill Edmundson
- Posts: 12618
- Joined: Wed Nov 23, 2005 6:45 am
- Location: Birmingham, AL, USA
- Contact:
Re: best way to remove unset epoxy
Bryan
Got me
Bill
Got me
Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build
Tahoe 19 Build
Re: best way to remove unset epoxy
That's why I am thinking i may no just be blush. I mus have done something wrong with mixing. Maybe I mixed up the a and b parts in the first batch and had my ratios off. I will try to clean blush with vinegar, but if that doesn't work, I am back to my first question. What is the best way to remove the uncured epoxy?
Bryan
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
- Bill Edmundson
- Posts: 12618
- Joined: Wed Nov 23, 2005 6:45 am
- Location: Birmingham, AL, USA
- Contact:
Re: best way to remove unset epoxy
Bryan
Use scraper to get as much as you can. I hope this isn't the glass coat. If it is then a heat gun may help. Lauren helped with my glass. She messed up on the ratios. But, most of it finally went off. That my story and I'm sticking to it (In the interest of domestic tranquility!)
Bill
Use scraper to get as much as you can. I hope this isn't the glass coat. If it is then a heat gun may help. Lauren helped with my glass. She messed up on the ratios. But, most of it finally went off. That my story and I'm sticking to it (In the interest of domestic tranquility!)
Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build
Tahoe 19 Build
- rbrandenstein
- Posts: 850
- Joined: Mon Mar 08, 2010 3:51 pm
- Location: O'Fallon, MO
Re: best way to remove unset epoxy
I'm not 100% sure about this, but I think you should measure by volume, not weight. The densities are probably very close so it may not matter.
Anyway, like Bill suggested, I get a carbide scraper (Harbor Freight sells a cheap one) and scrape as much as possible. Then use Acetone to wipe as much off as you can. It will eventually harden/dry so you can recoat.
Anyway, like Bill suggested, I get a carbide scraper (Harbor Freight sells a cheap one) and scrape as much as possible. Then use Acetone to wipe as much off as you can. It will eventually harden/dry so you can recoat.
Re: best way to remove unset epoxy
Bryan ,
I had a similar thing happen on my a final bottom coat of clear epoxy . I mixed everything the same, but the final coat was applied during heavy humidity, which hadn't affected me before so I got
a little too confident I think. Anyway, thinking it was blush, went through all the removal techniques, soap and water, ammonia, etc, to no avail. Sanding paper gummed immediately.
I waited a few days with plenty of air circulation, but think somehow the humidity mixed with the epoxy, so my patience ran out.
Took a paint scraper and found it relatively easy to remove the entire layer . Then cleaned and re sanded to 80 grit, and put another coat on. Worked fine.
Hope this helps. I am no chemist, other than humidity, have no idea how the batch went bad.
I also changed my beer brand to see if that helped for future mixing
Good luck.
I had a similar thing happen on my a final bottom coat of clear epoxy . I mixed everything the same, but the final coat was applied during heavy humidity, which hadn't affected me before so I got
a little too confident I think. Anyway, thinking it was blush, went through all the removal techniques, soap and water, ammonia, etc, to no avail. Sanding paper gummed immediately.
I waited a few days with plenty of air circulation, but think somehow the humidity mixed with the epoxy, so my patience ran out.
Took a paint scraper and found it relatively easy to remove the entire layer . Then cleaned and re sanded to 80 grit, and put another coat on. Worked fine.
Hope this helps. I am no chemist, other than humidity, have no idea how the batch went bad.
I also changed my beer brand to see if that helped for future mixing
Good luck.
Re: best way to remove unset epoxy
This morning I cleaned one area with vinegar and a scotch brite pad. Then cleaned with warm soap and water. Finally sanded with 100 grit. Seems to have come off fine. Will attack remaining areas the same way. Then I will wait for less humid day to reapply.
Thanks everyone for your help.
Bryan
Thanks everyone for your help.
Bryan
Bryan
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Re: best way to remove unset epoxy
With the time it has been trying to cure, ... it has nothing to do with the humidity especially in this weather, ... your mixture was wrong.
If your using pumps, ... sometimes your pump will allow air to get into the pump and it will vent the pump allowing some of what was in the pump to drain back into the can resulting in an "bad mix ratio". NOTE: This can happen with BRAND NEW pumps, ... I have had this happen more than once in the past.
Now, ... When mixing from pumps, The first pumps "resin and Hardener" are tossed. If I have to wait 2 hours till the next mix, ... Again, the first pumps are tossed.
I have NEVER had a bad mix from new or old pumps since then.
Just make sure you get all the uncured epoxy out from the wood grain, ... Your joint is only going to be as good as your prep, ... nothing more, ... nothing less.
Bill
If your using pumps, ... sometimes your pump will allow air to get into the pump and it will vent the pump allowing some of what was in the pump to drain back into the can resulting in an "bad mix ratio". NOTE: This can happen with BRAND NEW pumps, ... I have had this happen more than once in the past.
Now, ... When mixing from pumps, The first pumps "resin and Hardener" are tossed. If I have to wait 2 hours till the next mix, ... Again, the first pumps are tossed.
I have NEVER had a bad mix from new or old pumps since then.
Just make sure you get all the uncured epoxy out from the wood grain, ... Your joint is only going to be as good as your prep, ... nothing more, ... nothing less.
Bill
Bill
TNT Build, ... On Going, ... http://tinyurl.com/abmae64
The Freebie Zip, ... On Going, ...http://tinyurl.com/at3udss
Super Spartan Build "Miss Tripindicular", ... Completed, ...http://tinyurl.com/b488wsz
TNT Build, ... On Going, ... http://tinyurl.com/abmae64
The Freebie Zip, ... On Going, ...http://tinyurl.com/at3udss
Super Spartan Build "Miss Tripindicular", ... Completed, ...http://tinyurl.com/b488wsz
Re: best way to remove unset epoxy
Thanks for the heads up Bill.
I measured the two parts by weight because I don't trust the accuracy of the pumps. I think what happened is I mixed up components and mixed 2 parts B to 1 part A instead of 2 parts A to 1 part B. The areas effected will not have any joints. I was encapsulating the wood, and this was the second coat of epoxy.
Bryan
I measured the two parts by weight because I don't trust the accuracy of the pumps. I think what happened is I mixed up components and mixed 2 parts B to 1 part A instead of 2 parts A to 1 part B. The areas effected will not have any joints. I was encapsulating the wood, and this was the second coat of epoxy.
Bryan
Bryan
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
Building a malahini "Mona Lisa"
My wife said "If I build a boat, she's getting a divorce."
We're still happily married, but now she just wants "the dam boat out of the garage."
- tsmitherman
- Posts: 384
- Joined: Wed Jan 10, 2007 7:49 pm
- Location: Montevallo, AL
Re: best way to remove unset epoxy
When I mixed a batch using all resin from 2 containers rather than resin and hardener, I used the following method to remove it from the boat:
With leather gloves, I scrubbed the area with handfuls of sawdust. This go all the resin from the surface and left it feeling dry to the touch.
I followed that with several scrubbings with a rag soaked in vinegar.
I'm not sure if this method would work for half-cured epoxy or not, but it worked great for my "all resin" goof-up.
With leather gloves, I scrubbed the area with handfuls of sawdust. This go all the resin from the surface and left it feeling dry to the touch.
I followed that with several scrubbings with a rag soaked in vinegar.
I'm not sure if this method would work for half-cured epoxy or not, but it worked great for my "all resin" goof-up.
Tom
------------------------------
36' 1969 Willard Aft-Pilothouse Trawler
Blog: www.genesisboat.blogspot.com
Knot-So-Fast (BoJest) SOLD
"It's amazing what one can do when one doesn't know what one can't do." - Garfield
------------------------------
36' 1969 Willard Aft-Pilothouse Trawler
Blog: www.genesisboat.blogspot.com
Knot-So-Fast (BoJest) SOLD
"It's amazing what one can do when one doesn't know what one can't do." - Garfield
Re: best way to remove unset epoxy
you mixed a volume mix ratio using a weight mix ratio which is different
Paul Oman - MS. MBA
A.K.A. “Professor E. Poxy”
www.epoxyfacts.com
epoxies since 1994
Member: NACE (National Assoc. of Corrosion Engineers) -- SSPC (Soc. of Protective Coatings)
Paul Oman - MS. MBA
A.K.A. “Professor E. Poxy”
www.epoxyfacts.com
epoxies since 1994
Member: NACE (National Assoc. of Corrosion Engineers) -- SSPC (Soc. of Protective Coatings)