MSA GMC-P100 OV / Acid Gas / P100 Cartridge for Comfo Respirators — Box of 6

MSA GMC-P100 OV / Acid Gas / P100 Cartridge — Triple-Hazard Protection in One Bayonet Unit

The MSA GMC-P100 Combination Cartridge (SKU 815180) provides the broadest standard protection among the MSA Comfo P100 combination range, delivering simultaneous NIOSH-approved coverage for organic vapors, acid gases, and P100 (99.97%) particulate filtration in a single bayonet-mount unit. It is the appropriate selection for chemical processing, semiconductor manufacturing, and industrial operations where solvents, acid vapors, and aerosol or dust hazards are concurrently present. The GMC-P100 is compatible with the Advantage 200 LS, Comfo Classic, and Comfo II half-mask respirators.

Construction and Filter Media

The GMC-P100 incorporates a three-layer construction: a P100 particulate filter layer for aerosol capture, an activated carbon bed for organic vapor adsorption, and an impregnated sorbent layer for acid gas neutralization. Air passes through all three media in series before reaching the respirator facepiece, with the P100 layer positioned first to prevent particulate contamination of the chemical sorbent beds. This arrangement maximizes service life by protecting the chemical media from fouling. The bayonet mount provides quarter-turn tool-free attachment to all Comfo-platform respirators.

NIOSH Approval and Compliance

The GMC-P100 is NIOSH-approved under 42 CFR Part 84 for combined Organic Vapor, Acid Gas, and P100 particulate service. When used with a properly fitted MSA Comfo half-mask, the system delivers an APF of 10 per OSHA 29 CFR 1910.134. This is the highest level of combined chemical and particulate protection available in the standard MSA Comfo cartridge range for OV and acid gas hazard classes. Ammonia, methylamine, and multigas hazard classes require a different cartridge selection.

Performance in Industrial Environments

The GMC-P100 is particularly effective in environments where coating or surface treatment processes involve solvent-based materials, acid-catalyzed reactions, and particulate or mist generation simultaneously — a combination common in automotive refinishing, chemical vapor deposition, and semiconductor process areas. The P100 layer will show increased breathing resistance as it loads with particulates, serving as a practical change indicator independent of chemical service life. As with all chemical cartridges, an objective change schedule addressing both OV and acid gas service life must be maintained.

Strengths

• Single cartridge provides NIOSH-approved coverage for OV, acid gas, and P100 particulates — the most comprehensive standard combination
• Eliminates the need for multiple cartridge types in facilities with complex chemical and particulate hazard profiles
• P100 layer positioned to protect chemical sorbent beds from particulate fouling, maximizing chemical service life
• Compatible with all MSA Comfo half-mask respirators via the standard bayonet mount

Limitations

• Does not cover ammonia, methylamine, or multigas hazard classes — the GME-P100 (SKU 815182) or GMD-P100 (SKU 815181) are required for those hazards
• Box of 6 results in a higher per-box cost than standalone chemical cartridges
• Three-layer construction may produce higher breathing resistance than simpler cartridge designs, particularly as the P100 layer loads

Recommended Use Cases

The GMC-P100 is suited for automotive body repair and refinishing operations involving solvent-based primers, acid-catalyzed clearcoats, and spray mists; chemical manufacturing where process streams include solvents, acids, and aerosols; semiconductor fabrication areas with concurrent OV, acid gas, and particulate hazards; and industrial coating operations using two-component acid-cure systems.

Verdict

The MSA GMC-P100 is the practical choice for Comfo respirator users who require OV, acid gas, and particulate protection in a single unit without managing multiple cartridge attachments. For environments additionally involving ammonia or multigas hazards, the GME-P100 (SKU 815182) provides the broadest available coverage. For OV and particulate-only environments without acid gas, the GMA-P100 (SKU 815178) offers the same P100 filtration at a comparable price point.

Frequently Asked Questions