Title: User Seal Checks & Wearing Guidelines
Type: Lesson
A user seal check is a quick test the wearer performs every time they put on a tight-fitting respirator to ensure a proper seal.
It is not a substitute for a fit test — but it’s critical for daily protection.
Gently exhale while covering the exhalation valve (or the respirator surface if no valve)
If the facepiece bulges slightly and no air leaks out, the seal is good
Cover the inhalation ports or filters and inhale gently
The facepiece should collapse slightly and stay collapsed
No air should enter — if it does, the seal is bad
Always perform a seal check after donning the respirator and before entering a hazardous area.
Straps too loose or twisted
Hair or facial hair interfering with the seal
Dirt or debris on the sealing surface
Damaged or worn-out facepiece
Misaligned nose bridge or facepiece
Always inspect for cracks, tears, or missing parts before use
Do not use respirators without a proper fit test and medical clearance
Never remove your respirator in a contaminated area
Replace filters or cartridges as required (follow manufacturer guidelines)
Store respirators in clean, dry containers
A respirator that isn’t sealed to your face might as well not be worn. Seal checks are your last line of defense. Take them seriously — and do them every time.
Click “Mark Complete” to continue to Lesson 5: Medical Evaluation & Clearance Requirements, where we’ll explain why OSHA requires you to be medically cleared before using a respirator.