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I have found that using JB Weld as a filler as well as an adhesive to be quite effective.

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  • Member since
    March 2005
I have found that using JB Weld as a filler as well as an adhesive to be quite effective.
Posted by philo426 on Sunday, March 21, 2021 8:33 AM

I have been using JB Weld 2 part adhesive as a gap filler as well as an adhesive to be quite effective.I can smooth out the joint with a Q tip dunked in alcohol .Super strong bond and effective gap filler!

  • Member since
    February 2003
  • From: East Bethel, MN
Posted by midnightprowler on Sunday, March 21, 2021 8:37 AM

Seems to me that would be much harder than the surrounding plastic for sanding purposses.

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  • Member since
    March 2005
Posted by philo426 on Sunday, March 21, 2021 9:09 AM

The key is to smooth it out with the alcohol Q tip before it cures 

  • Member since
    August 2016
Posted by Keyda81 on Sunday, March 21, 2021 10:08 AM

I use Apoxie Sculpt for the same purpose.  You don't need alcohol to smooth it though, water works very well as long as it is done before it cures.  It is quite hard once cured, but still sandable.  I use it mostly on bigger gaps, or wing root seams where I need a nice strong bond. 

  • Member since
    March 2005
Posted by philo426 on Sunday, March 21, 2021 10:32 AM

Yes I used it to reattach the tail I had to cut add to correct a lean as well as attaching the wings and engine nacelles where a gap was present at the wing root.  

  • Member since
    April 2020
Posted by Eaglecash867 on Sunday, March 21, 2021 11:46 AM

I use Milliput for the same situations, and its also water soluble before it cures.  Anything that can be smoothed flush with mild solvents or no solvents and will harden enough to actually stay put afterward is a huge plus for avoiding damage to intricate details.  Didn't know this about JB Weld.  Pretty cool stuff!  Cool 

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  • Member since
    March 2005
Posted by philo426 on Sunday, March 21, 2021 12:02 PM

Yes I should try that Miliput.

  • Member since
    January 2021
Posted by PFJN2 on Sunday, March 21, 2021 4:04 PM

As an aside, doing things the other way around, in the past I have used stuff like "Squardon Green Putty" as an adhesive for bonding non-like matereials (such as balsa or bass wood to plastic).

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