Gas assist molding is a subset of plastic injection molding that expands on the capabilities of traditional design and processing limitations. By using nitrogen gas pressure to assist in packing out a part, molders can produce components that are functionally and cosmetically superior, especially when working with thick geometry.

By opening design and manufacturing options for numerous applications, gas assist molding expands upon the versatility of traditional plastic processing while benefiting from its proven repeatability in high-quality part production. Due to its availability, cost and inertness, Nitrogen is typically used for external and internal gas assist molding.