A good "liquid" weld?
 

Can anyone recomend me a good liquid weld which is actually more of a liquid then somthing like jb weld?

I'm filling/coating a cavity on my dirtbikes crank case cover and I'd like somthing that I can pour rather then apply with a stick etc

A guy recomended me polymer resin I think it was?

The cover is made of magnesium

Recommend you call one of the Industrial Plastics Stores, they have all sorts of crazy stuff including liquid metal;

http://ippnet.com/