What is a necessary maintenance step for an internal mix gun?

Flushing the gun after each use is crucial for maintaining an internal mix gun, which is designed to combine two or more materials (often resins and hardeners) internally before they are sprayed. This step is necessary because residual material can cure within the gun if not properly cleaned out, leading to clogs and degraded performance over time.

Many of these guns utilize precise internal mechanisms that need to remain free of debris and cured material to ensure correct mixing and application of the compounds. By flushing the gun after each use, you help ensure that any remaining materials are cleared out, preventing buildup and ensuring reliable operation for future uses. This routine maintenance can extend the life of the tool and maintain the quality of the work produced.

While inspecting the nozzle regularly is important for overall maintenance, it does not address the internal build-up that can occur if the gun is not flushed properly. Similarly, replacing the cartridge weekly might be relevant for some scenarios but does not directly contribute to the internal cleanliness of the mixing mechanism. Immediate cleansing with water after use is generally specific to particular materials and may not be applicable in all scenarios. Hence, flushing the gun after each use remains the most effective maintenance step for ensuring optimal performance of an internal mix gun.