Flexible filler recommendations

[waddycall]

Hi,
Can anyone recommend a decent flexible body filler for aluminium that’s good for repairs about 12mm deep and idiot proof?
Thanks

 

[MetalMonkey]

UPOL do some, and I've used the Big Boy Metal Filler as well.
But 12mm is a lot, double the maximum you would really want to have - so high chance of cracking.
Can you not get the panel much closer the finished size.

 

[8ob]

Plastic padding Alu, what used to be Ultima. Used it in mold making and know it can take a bashing without letting go, you can get a dispenser for it that makes sure the correct filler/hardener ratio gets mixed

 

[jsf55]

I had too fill a bit of a depression on my hot rod roof as i had a poor match of panels and went with the P40 with fibreglass, been on for a good few years with no issue