Epoxy didn't fully harden -- what do I do now???

Epoxy didn't fully harden -- what do I do now???

Post by John Jorda » Fri, 06 Apr 2001 09:53:13



I'm building a PML X-caliber and ran out of epoxy while doing fin fillets.  
The X-calber has 6 fins, and each fin has 6 locations for fillets (each side
of fin on outside of body tube, inside of body tube, and at motor mount
tube),
so there are 36 fillets in all.  The interior fillets are particular
challenging since there is only about 1/8 inch gap between inner wall of the
body tube and the outside of the motor mount, and the root edge of the large
fins is at least 9" long.

So I was out of epoxy but I had to go to the market anyway, so I picked up a
package of 30 minute two-part epoxy in the hardware aisle.  I then happily
went back to putting fillets on the fins.  I did 6 of the 36 fillets with
the
new epoxy, then a set it aside to cure.  The next evening I was going to do
some more fillets and I checked the ones that I had done before.  They
seemed
hard when I touched them, but when I pressed down with my finger I stuck a
little to the epoxy and left a fingerprint in it.  I've waited a couple more
days, but it's still the same -- hard, but slightly tacky.  Now what do I
do?

I don't think I can remove the epoxy, especially from the interior fillets,
or
I would do that.  Would spreading just the epoxy hardener on the surface of
the exterior fillets help any?  Should I go over the fillets with better
quality epoxy that I trust to harden?  or would the soft epoxy underneath
"infect" the top epoxy with the same disease?

I was really looking forward to flying this rocket, and this whole glue mess
has somewhat damped my e***ment.  I'm dead in the water until I can get
past
this.  I would appreciate any helpful advice.

Thanks,

- John

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Neil Tarasof » Fri, 06 Apr 2001 10:26:12


John,

Send the rocket to me, buy a new one & start over.
I specialize in flying rockets with soft fillets! 8-)

Dancing Baby

Quote:

> I'm building a PML X-caliber and ran out of epoxy while doing fin fillets.
> The X-calber has 6 fins, and each fin has 6 locations for fillets (each side
> of fin on outside of body tube, inside of body tube, and at motor mount
> tube),
> so there are 36 fillets in all.  The interior fillets are particular
> challenging since there is only about 1/8 inch gap between inner wall of the
> body tube and the outside of the motor mount, and the root edge of the large
> fins is at least 9" long.

> So I was out of epoxy but I had to go to the market anyway, so I picked up a
> package of 30 minute two-part epoxy in the hardware aisle.  I then happily
> went back to putting fillets on the fins.  I did 6 of the 36 fillets with
> the
> new epoxy, then a set it aside to cure.  The next evening I was going to do
> some more fillets and I checked the ones that I had done before.  They
> seemed
> hard when I touched them, but when I pressed down with my finger I stuck a
> little to the epoxy and left a fingerprint in it.  I've waited a couple more
> days, but it's still the same -- hard, but slightly tacky.  Now what do I
> do?

> I don't think I can remove the epoxy, especially from the interior fillets,
> or
> I would do that.  Would spreading just the epoxy hardener on the surface of
> the exterior fillets help any?  Should I go over the fillets with better
> quality epoxy that I trust to harden?  or would the soft epoxy underneath
> "infect" the top epoxy with the same disease?

> I was really looking forward to flying this rocket, and this whole glue mess
> has somewhat damped my e***ment.  I'm dead in the water until I can get
> past
> this.  I would appreciate any helpful advice.

> Thanks,

> - John


 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Neil Tarasof » Fri, 06 Apr 2001 10:26:57


John,

Send the rocket to me, buy a new one & start over.
I specialize in flying rockets with soft fillets! 8-)

Life is hell when it just will not get hard!!!!

Dancing Baby

Quote:

> I'm building a PML X-caliber and ran out of epoxy while doing fin fillets.
> The X-calber has 6 fins, and each fin has 6 locations for fillets (each side
> of fin on outside of body tube, inside of body tube, and at motor mount
> tube),
> so there are 36 fillets in all.  The interior fillets are particular
> challenging since there is only about 1/8 inch gap between inner wall of the
> body tube and the outside of the motor mount, and the root edge of the large
> fins is at least 9" long.

> So I was out of epoxy but I had to go to the market anyway, so I picked up a
> package of 30 minute two-part epoxy in the hardware aisle.  I then happily
> went back to putting fillets on the fins.  I did 6 of the 36 fillets with
> the
> new epoxy, then a set it aside to cure.  The next evening I was going to do
> some more fillets and I checked the ones that I had done before.  They
> seemed
> hard when I touched them, but when I pressed down with my finger I stuck a
> little to the epoxy and left a fingerprint in it.  I've waited a couple more
> days, but it's still the same -- hard, but slightly tacky.  Now what do I
> do?

> I don't think I can remove the epoxy, especially from the interior fillets,
> or
> I would do that.  Would spreading just the epoxy hardener on the surface of
> the exterior fillets help any?  Should I go over the fillets with better
> quality epoxy that I trust to harden?  or would the soft epoxy underneath
> "infect" the top epoxy with the same disease?

> I was really looking forward to flying this rocket, and this whole glue mess
> has somewhat damped my e***ment.  I'm dead in the water until I can get
> past
> this.  I would appreciate any helpful advice.

> Thanks,

> - John

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by BULLPU » Fri, 06 Apr 2001 12:30:30


I would not add hardener as this will not help. If you can heat it up it may
still harden. I dont know if its safe to put in your home oven at a very low
temp. If you live in a warm climate a day in the car in the sun may do it. Good
external fillets should be big help.Foaming the back end is a definite
advantage (2 part foam) I think if you find a way to heat it (maybe a local
auto body shop could put it in the spray booth next time they paint a car) that
would be your best shot. Remember that a six pack of beer gets alot of favors
done. Good luck

Bill Rossi
             \\\///
           (O)(O)  
--oOO----(__)--------------
: I WILL WORK FOR :
: ROCKET MOTORS :
:-------------------oOO-----:
          |__|   |__|
           |~|    |~|  
          ooO  Ooo    http://members.aol.com/BULLPUPP/index.html

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by bob fortun » Fri, 06 Apr 2001 13:39:26


Yikes,

Don't you hate when that happens?

Put the rocket in a black trash bag in the sun for a day and see what
hardens.  If nothing then you're kinda stuck.

If it was me (and it's been me before)  I'd scrape out what I could get
from the inside, make a hook thingy and pretend you're doing a lobotomy.
 Urethane glue or that 2 part foam would work nicely in lieu of fillets
here, if you use the urethane squirt some water in first to dampen the surfaces.

Scrape off the outside fillets and start over again.  I wish there was
an easy solution for you but there isn't one.  Sorry.

Bob

Quote:

> I'm building a PML X-caliber and ran out of epoxy while doing fin fillets.
> The X-calber has 6 fins, and each fin has 6 locations for fillets (each side
> of fin on outside of body tube, inside of body tube, and at motor mount
> tube),
> so there are 36 fillets in all.  The interior fillets are particular
> challenging since there is only about 1/8 inch gap between inner wall of the
> body tube and the outside of the motor mount, and the root edge of the large
> fins is at least 9" long.

> So I was out of epoxy but I had to go to the market anyway, so I picked up a
> package of 30 minute two-part epoxy in the hardware aisle.  I then happily
> went back to putting fillets on the fins.  I did 6 of the 36 fillets with
> the
> new epoxy, then a set it aside to cure.  The next evening I was going to do
> some more fillets and I checked the ones that I had done before.  They
> seemed
> hard when I touched them, but when I pressed down with my finger I stuck a
> little to the epoxy and left a fingerprint in it.  I've waited a couple more
> days, but it's still the same -- hard, but slightly tacky.  Now what do I
> do?

> I don't think I can remove the epoxy, especially from the interior fillets,
> or
> I would do that.  Would spreading just the epoxy hardener on the surface of
> the exterior fillets help any?  Should I go over the fillets with better
> quality epoxy that I trust to harden?  or would the soft epoxy underneath
> "infect" the top epoxy with the same disease?

> I was really looking forward to flying this rocket, and this whole glue mess
> has somewhat damped my e***ment.  I'm dead in the water until I can get
> past
> this.  I would appreciate any helpful advice.

> Thanks,

> - John

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by tai f » Fri, 06 Apr 2001 16:11:02


(I had this before, glad it was a test- when my mixed system 3 didnt
harden....) if you need to panic, now's the time... then take a xacto knife
and scrape out as much of the epoxy as you can, and reapply... either that
or give it some time, like weeks see if it does cure.

--

replace n with s to reply
---
Tai Fu
NAR# 76089

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Travis n Tex » Fri, 06 Apr 2001 15:06:10


Okay, sorry in advance.  Another irritating newbie question.

I keep seeing references to two part foams being used.  What are
brands that are preffered, where can they be obtained, etc.

I still have visions of the split tubes on a georgeous rocket/glider
that I got off of RBMR the other day, and I don't want to do that.

Travis

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Andy E » Sat, 07 Apr 2001 00:01:09


Hello Bob,

We seem to see this question about once every couple of months, eh?
Perhaps something for the FAQ?  :-)

TTYL,
Andy



Quote:
>Yikes,

>Don't you hate when that happens?

>Put the rocket in a black trash bag in the sun for a day and see what
>hardens.  If nothing then you're kinda stuck.

>If it was me (and it's been me before)  I'd scrape out what I could get
>from the inside, make a hook thingy and pretend you're doing a lobotomy.
> Urethane glue or that 2 part foam would work nicely in lieu of fillets
>here, if you use the urethane squirt some water in first to dampen the surfaces.

>Scrape off the outside fillets and start over again.  I wish there was
>an easy solution for you but there isn't one.  Sorry.

>Bob


>> I'm building a PML X-caliber and ran out of epoxy while doing fin fillets.
>> The X-calber has 6 fins, and each fin has 6 locations for fillets (each side
>> of fin on outside of body tube, inside of body tube, and at motor mount
>> tube),
>> so there are 36 fillets in all.  The interior fillets are particular
>> challenging since there is only about 1/8 inch gap between inner wall of the
>> body tube and the outside of the motor mount, and the root edge of the large
>> fins is at least 9" long.

>> So I was out of epoxy but I had to go to the market anyway, so I picked up a
>> package of 30 minute two-part epoxy in the hardware aisle.  I then happily
>> went back to putting fillets on the fins.  I did 6 of the 36 fillets with
>> the
>> new epoxy, then a set it aside to cure.  The next evening I was going to do
>> some more fillets and I checked the ones that I had done before.  They
>> seemed
>> hard when I touched them, but when I pressed down with my finger I stuck a
>> little to the epoxy and left a fingerprint in it.  I've waited a couple more
>> days, but it's still the same -- hard, but slightly tacky.  Now what do I
>> do?

>> I don't think I can remove the epoxy, especially from the interior fillets,
>> or
>> I would do that.  Would spreading just the epoxy hardener on the surface of
>> the exterior fillets help any?  Should I go over the fillets with better
>> quality epoxy that I trust to harden?  or would the soft epoxy underneath
>> "infect" the top epoxy with the same disease?

>> I was really looking forward to flying this rocket, and this whole glue mess
>> has somewhat damped my e***ment.  I'm dead in the water until I can get
>> past
>> this.  I would appreciate any helpful advice.

>> Thanks,

>> - John

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Mark Daughtry, S » Sat, 07 Apr 2001 00:08:44


Whoa here folks.....He didn't say the epoxy was gummy through and through.
All he said was the surface was a touch tacky and he could see his
fingerprint in it. Here's a direct quote from his post:

Quote:
>They seemed hard when I touched them, but when I pressed down with my
>finger I stuck a little to the epoxy and left a fingerprint in it.  I've

waited a >couple more days, but it's still the same -- hard, but slightly
tacky.  Now what >do I do?

Can't this be the waxy like whatever you call it that can precipitate from
some epoxies that can be cleaned off with ***? That would be my number
one try at rectifying the problem and I would only worry about the outer
fillets as that's the only place you would be worried about paint adhesion.

--
Best regards,
Mark Daughtry, SR
Ignorance is bliss unless you are surrounded by it.
Ignorance is like bad breath: You usually don't know you have it.
NAR 71556 SR L1
MSRS 0035 SR

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Jim Yan » Sat, 07 Apr 2001 00:33:54




Quote:
>Whoa here folks.....He didn't say the epoxy was gummy through and
>through. All he said was the surface was a touch tacky and he could see
>his fingerprint in it. Here's a direct quote from his post:

>>They seemed hard when I touched them, but when I pressed down with my
>>finger I stuck a little to the epoxy and left a fingerprint in it.
>>I've
>waited a >couple more days, but it's still the same -- hard, but
>slightly tacky.  Now what >do I do?

>Can't this be the waxy like whatever you call it that can precipitate
>from some epoxies that can be cleaned off with ***? That would be my
>number one try at rectifying the problem and I would only worry about
>the outer fillets as that's the only place you would be worried about
>paint adhesion.

>--
>Best regards,
>Mark Daughtry, SR
>Ignorance is bliss unless you are surrounded by it.
>Ignorance is like bad breath: You usually don't know you have it.
>NAR 71556 SR L1
>MSRS 0035 SR

IMO,you win the 'best advice' prize for this question.
{A hundred "attaboy's".} :-)
--
Jim Yanik,NRA member
remove X to contact me

-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.FoundCollection.com/ - The #1 Newsgroup Service in the World!
-----==  Over 80,000 Newsgroups - 16 Different Servers! =-----

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Andy E » Sat, 07 Apr 2001 03:15:22


On Thu, 05 Apr 2001 15:08:44 GMT, "Mark Daughtry, SR"

Quote:

>Whoa here folks.....He didn't say the epoxy was gummy through and through.
>All he said was the surface was a touch tacky and he could see his
>fingerprint in it. Here's a direct quote from his post:

>>They seemed hard when I touched them, but when I pressed down with my
>>finger I stuck a little to the epoxy and left a fingerprint in it.  I've
>waited a >couple more days, but it's still the same -- hard, but slightly
>tacky.  Now what >do I do?

>Can't this be the waxy like whatever you call it that can precipitate from
>some epoxies that can be cleaned off with ***? That would be my number
>one try at rectifying the problem and I would only worry about the outer
>fillets as that's the only place you would be worried about paint adhesion.

Hello Mark,

Another FAQ...  :-)

Where's that Simpson??!!??

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Art Fuldodge » Sat, 07 Apr 2001 02:43:59


Sheeza whiz people, this topic is over 24 hours old, and not one
single person brought up Sildenafil Citrate!?

Youz people are slippin', lemme tell you.......

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Rick Dickinso » Sat, 07 Apr 2001 03:52:44


[re: Non-hardened epoxy, and what to do about it]

Quote:
>We seem to see this question about once every couple of months, eh?
>Perhaps something for the FAQ?  :-)

Noted.  I'll include a few suggestions in the Glue FAQ section.

 - Rick "FAQ Off"***inson

--
                AMAZING BUT TRUE ...
There is so much sand in Northern Africa that if it were spread
out, it would completely cover the Sahara Desert.

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Rick Polzell » Sat, 07 Apr 2001 04:53:35


I have a great source. Call JUST SILDENAFIL at 1-800-ITSHARD.

Just tryin' to help.


Quote:
> Sheeza whiz people, this topic is over 24 hours old, and not one
> single person brought up Sildenafil Citrate!?

> Youz people are slippin', lemme tell you.......

 
 
 

Epoxy didn't fully harden -- what do I do now???

Post by Gordon McGr » Sun, 08 Apr 2001 13:59:37




Quote:
>Sheeza whiz people, this topic is over 24 hours old, and not one
>single person brought up Sildenafil Citrate!?

>Youz people are slippin', lemme tell you.......

Also helps keep the rocket upright.