Why is the tear strength of the silicone mold weak?

In order to reduce the viscosity of silicone rubber, you may add a lot of silicone oil into the silicon rubber when making molds. In fact, adding silicone oil might have just the opposite effect. The tension and the tear strength will be reduced badly with the addition of silicon oil. And the silicon molds will be in a weak and flimsy manner.

 

2018-01-04