non-drying moulding clay?

I've noticed that installers often use non-drying moulding clay for stubborn resonances in doors, kicks, etc. Can anyonne recommend a brand / model of moulding clay, and where to purchase? Thanks in advance!

I guess I will post here it as well haha. Didn't notice on DIYMO that you were a canuck.



I get it at wallacks.

I pulled out some kicks that were around 5 years old from my basement a while back and the clay hadn't dried up.

I use 'Ideal duct seal' it isnt molding clay, I have never used a better product. Should be available by mail order or from a hardware supply

any model/train store, it called (pardon spelled)

plasterine - comes in neat colors

Thanks for the info! found some hubbarts for $3.99 at Toy and Hobby Central.

x2 on the Duct Seal, I get mine at Home Depot, $2.xx a pound.