What should be done each time a tight-fitting respirator is put on?

When putting on a tight-fitting respirator, performing a seal check is essential to ensure that the respirator forms a proper barrier against airborne contaminants. A seal check involves the wearer ensuring that there are no gaps between the face and the respirator, which is critical for effective protection. The check typically involves taking a deep breath in to see if the respirator pulls in tightly against the face or exhaling gently to feel for air escaping from any points of potential leakage.

This step is vital because even a small gap can allow harmful substances to enter, compromising the respirator's protective capability. In contrast, while fit tests, cleaning, and checking for damage are all important components of respirator use and maintenance, they are not performed every single time the respirator is donned. Fit testing is done periodically to ensure the respirator's size and shape fit the wearer properly over time, cleaning is scheduled based on usage, and damage checks are essential but typically part of regular maintenance rather than an immediate pre-use step.