When investing wax patterns, air is frequently trapped in narrow areas; and using brushes to coat these areas with investment can usually lead to additional entrapment of air. Additionally, when using a brush for detailed investing, liquid can be added or withdrawn from the mix which can affect its expansion behavior. The use of sharp-edged instruments increases the probability of damaging wax patterns, therefore they are not recommended. Thanks to the flexible and bent tip, the Transfuser allows controlled and bubble-free filling of investment even in the tightest spaces without damaging wax/plastic patterns.