This 2-Part Silicone Putty "KIT" comprises :
2 x 500g part A&B, (cures to 40 Shore A)
+ 100g pro-glu rubber strand (lowers Shore A to 20)
+ pro-glu mix (raises Shore A to 60).
This is a great "KIT", one product with 2 additives enable you to vary the hardness from Shore A 20 - Shore A 60. No need for different pots of different hardness !
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