A two-component rigid urethane casting compound. It cures to Shore 65D and is white in colour. 4PU is a medium setting material that demonstrates slightly more flexibility than other
similar materials. It is machinable, can be sanded, drilled, turned and ground. It accepts a wide range of fillers and can reproduce the most minute detail as a result of its low viscosity.
This system is easily pigmented and fast turnover of parts can be achieved. The viscosity of 4PU is much lower than most other 5-minute gel time materials.