[Tom45282003]

I have the ear impressions, I want to use silicon but I am not sure what type of silicon should I use for the project, should I use regular one at the hardware store, I already have the instrution on some website
can someone tell me what I should use
 
thanks in advance

 

[gimble]

There are a lot of varieties, many of which just aren't suitable for that application for any of several reasons (crumbling, post-cast malleability, toxicity, et cetera).
 
You might try looking here.