Other mats for Fillets

Anybody using anything other than plastercine/clay for their flange fillets?
I’m getting sick of clay lol
Wondering if there is something easier

I’ve used DAP a couple of times. Goes on pink and dries clear, they sell it at Home Depot etc. It’s water soluble too.

I guess it’s some sort of drywall paste, not very rigid, cracks easily so you have to be carefull moving the part around.

It actually dries white and I seal it with wax.