Resin Repair/Filler Material?


Sr Member
I have a resin casting that with a crack in it that needs filling. It is a large piece, and the crack is roughly 1/8" wide by 2" long. What is an easy to find, easy to use material to act as an adhesive and filler, that will take paint? THANKS.


New Member
Both the above are great - especially the Milliput, but you can use any auto car body filler.

Isopon P38 in the UK or Bondo in the US are both ideal.


Well-Known Member
put baking soda in the crack and then run thin super glue over it. It cures instantly. It's also hard as a rock. Personally, I'd suggest using magic sands easier and can be smoothed with water before it cures, so you can cut down on a lot of the sanding.



Sr Member
Gone but not forgotten.
If it IS really wide and has the
chance of opening up more in the

{ i.e., an area that MIGHT bend some }

then I'd double team it ! Use the
backing soda and super glue INSIDE
the crack and then use a good putty
to COVER the crack ! That way, there
would be NO WAY down the road it could
re-open as the glue holds it FIRM !

Oh, and footnote too for the
baking soda superglue! Be VERY careful
when you do this, as you add the superglue
to the baking soda it can emit " FUMES "..
the crap out of your eye's if too close !


Sluis Van Shipyards

Master Member
I've read in Modeler's Resource that they use Aves epoxy putty to fill big cracks.

BTW, I guess this is wrong, but I thought you weren't supposed to use superglue/accelerator on resin because the glue is harder than the resin? Or does that just mean you don't leave it sitting around for a while before you sand?


Sr Member
Gone but not forgotten.
Depending on the quality of the resin,
" MOST " of the time the CA and Baking Soda is
ALLOT harder then the resin !!!!!

I use ONLY to fill voids and such in
kit's, or like said above a deep
crack !

But yeah, some cheaper resin's out there
are so soft that when CA and Soda are used
and you try to sand you'll usually just " dig "
the resin out around the repair and barely
knock down the HARD stuff!

Jedi Dade

Sr Member
Auto body Glazing putty works pretty well but that's a pretty deep and long crack. I think the Baking soda and CA route is a pretty good one followed by galzing putty to cover up the mess. glazing putty is great and its only like $2 at the local auto supply store (I use pep boys). Hope it works out

Jedi Dade


Master Member
Yeah, bondo or perhaps a two-part epoxy topped off with putty or JB Weld sounds like it would work.

I'm getting away from super glues. Have you ever come across something you superglued years before and have the bond crumble to nothing right in your hand? That's what happens to super glue (CA) over time.

Jedi Dade

Sr Member
Yep I'm not a big fan of superglue but pretty much if you build resin - its the way to go. Most 2 part empoxies are too thick but I still use them whe I think I can get wawy with it ;-)

Jedi Dade