ApoxieSculpt 
quarter pound set (part A + partB)
 
This is my favorite epoxy clay! i use it all the time in my creations.

Comes in 2parts - mix equal amounts together to form a putty that cures rock-hard. About 1 -1.5 hour best work time for adding things in a mosaic-assemblage style.

oh i love this stuff!
 
choose white or black