Part B of Flex-Tec will actually turn cloudy when stored in temperatures below 65° F (15° C).
Before you mix your Flex-Tec, you should warm the Part B to about 90° F until it clears up. This won't affect the chemical at all, but it is necessary in order to clear up Part B before mixing.
You will also need to shake Part B well before mixing to adequately homogenize the material. Part B has a tendency to separate when allowed to sit for long periods.
So remember, warm Part B to around 90° until it clears up and then shake well before mixing with part A.