MSA GMT Respirator Cartridge — Multi-Gas (MSA Comfo)

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Read our hands-on MSA GMT review for field-tested buyer notes.

MSA GMT Respirator Cartridge Overview

The MSA GMT is a NIOSH-approved multi-gas cartridge for the MSA Comfo system. It adsorbs organic vapor, acid gas and other listed gases, and tritium oxide (tritiated water vapor) and carries a olive (multi-gas) band. As a Comfo cartridge it fits MSA Comfo Classic, Comfo II, Ultra-Twin and Ultra-Elite respirators. Start with our guide to choosing a respirator cartridge, confirm the band on the respirator cartridge color chart, and see MSA Comfo vs Advantage if you are unsure which system you own.

The MSA GMT belongs to the MSA respirator filters and cartridges range. It is a gas cartridge only — for dust, step up to the GME/P100 combination cartridge, which builds a P100 filter in.

Where the MSA GMT Fits in Cartridge Selection

Confirm the hazard before the cartridge. The MSA GMT handles multi-gas gas — not particulate. If you also face dust or mist, our organic vapor vs P100 guide and filter types explained cover when to move to a combination cartridge.

Who Should Buy the MSA GMT?

Buy it if your exposure is multi-gas with no significant dust, on an MSA Comfo facepiece. Choose another cartridge if your hazard differs: for multi-gas plus dust use the GME/P100, and for a broader gas mix see the MSA Comfo GME multi-gas cartridge.

What Does the MSA GMT Protect Against?

What the MSA GMT Does NOT Protect Against

The MSA GMT does not capture particulate or gases outside its approved list. For dust, step up to the GME/P100 combination cartridge, which builds a P100 filter in; for a different gas, match the MSA cartridge to the hazard.

No air-purifying cartridge makes a dangerous atmosphere safe. Never use the MSA GMT in an oxygen-deficient or IDLH (immediately dangerous to life or health) atmosphere, in unknown concentrations, or against gases with no warning properties — those conditions require a supplied-air or SCBA system, not a cartridge respirator.

Best Applications

Tritium service

Its distinguishing use is tritium oxide (tritiated water vapor) in nuclear and research settings, alongside multi-gas duty.

General multi-gas

Mixed industrial gases where one cartridge must cover a range.

Pros & Cons

MSA GMT vs Other MSA Cartridges

MSA GMT vs the Alternatives

How it compares to the closest MSA options:

• GMT vs GME: both are multi-gas; the GMT is additionally rated for tritium oxide service.
• GMT vs GMI/P100: the GMI is the radioiodine specialist; the GMT handles tritium oxide and general gases.
• GMT vs GME/P100: add the GME/P100 when you also need built-in P100 particulate.

MSA GMT Quick Answers

Does the MSA GMT filter dust?

No — it is gas-only; for particulate use the GME/P100 or add a prefilter.

Does the MSA GMT fit my MSA respirator?

It fits the MSA Comfo family. Check your facepiece against the MSA half-mask and full-face ranges.

Is the MSA GMT reusable?

The cartridge is used until its service life is reached; the respirator is reusable across many cartridge changes.

MSA GMT Specifications

Compatible MSA Respirators

The MSA GMT uses the MSA Comfo threaded-bayonet connection, so it mounts on the Comfo Classic half-mask and Ultra-Elite full-face respirators (and the Comfo II and Ultra-Twin). It is not interchangeable with the MSA Advantage series, and does not fit 3M, Honeywell North or other brands.

Helpful Buying Guides

• MSA Comfo vs Advantage
• How to choose a respirator cartridge
• MSA vs 3M respirator cartridges
• MSA vs Honeywell North cartridges
• organic vapor vs P100
• respirator cartridge color chart
• respirator filter types explained

MSA GMT Frequently Asked Questions

What does the MSA GMT protect against?

The MSA GMT is a multi-gas cartridge. It adsorbs organic vapor, acid gas and other listed gases, and tritium oxide (tritiated water vapor). It is gas-only and does not filter particulate; it does not protect against gases outside its approved list.

Does the MSA GMT filter dust?

No. It is a gas cartridge. For dust or mist, step up to the GME/P100 combination cartridge, which builds a P100 filter in.

Which respirators does the MSA GMT fit?

It uses the MSA Comfo threaded-bayonet connection and fits the Comfo Classic, Comfo II, Ultra-Twin and Ultra-Elite. It does not fit the Advantage series.

What color band is the MSA GMT?

The MSA GMT carries a olive (multi-gas) band; confirm it on the cartridge color chart before use.

Is the MSA GMT NIOSH-approved?

Yes. The MSA GMT is NIOSH-approved under 42 CFR Part 84 for multi-gas. Verify any cartridge against the NIOSH Certified Equipment List.

How is the MSA GMT sold?

This listing is the Each. Use Request a Quote for case pricing on volume orders.

How often should I replace the MSA GMT?

Replace the cartridge on a documented change-out schedule, when you detect gas or odor breakthrough, or when it is damaged.

Can I add a P100 filter to the MSA GMT?

Yes — the easiest route is the GME/P100, which builds a P100 particulate filter into the same gas cartridge.

Is the MSA GMT the same as the Advantage version?

No. The chemistry is equivalent, but the connection differs — Comfo and Advantage cartridges are not interchangeable. Match the cartridge to your facepiece.

Is this the genuine MSA GMT cartridge?

Yes. WC Safety sells authentic, NIOSH-approved MSA GMT cartridges through legitimate supply channels.

What is the difference between the MSA GMT and a multi-gas cartridge?

A single-class cartridge is tuned to its listed gases; a multi-gas cartridge covers a broader mix at the cost of a shorter service life against any one gas.

How should I store the MSA GMT?

Store it sealed in its original packaging, away from gases and dust, so the sorbent is not used up before you wear it.