Squishy Breast Stress Relief Toy

Step 4 Mix the pourable rubber

The PMC-744 polyurethane rubber is mixed in 2:1 ratio. In other words, there is twice as much of part B as there is part A. To be on the safe side, use all of both containers. This will keep you from having to really measure things out and do the math necessary to figure out the correct amount of each part (because the less time you have to spend working with and measuring out these chemicals, the better off you are).

What I did was to pour part B and thoroughly mix it in the container. Then I poured in part A and thoroughly mixed the both of them together. I continued mixing for a couple of minutes, but not for too long since the pot-life on PMC-744 is only 15 minutes.