I'd like to be able to buy a "tub" of each compound for making plugs for a group, such as boy scouts. The compounds mix very easily and forms well. The whole thing is done in about 10 minutes and the plugs seal very well when using. I made mine for my work in a steel mill (VERY noisy). They work great.
Pros: Easy to mold/form, good seal when using.
Cons: A little pricey, but worth it.
This review was written in the old system and had content requirements that are different than reviews written today.