3M Semimaschera 4251+BC1 blu (4251+BC1)

For tasks involving organic vapours, fine dusts, and mists, the 3M Half Mask 4251+BC1 eliminates the need for separate filter cartridges—its integrated, maintenance-free design delivers A1P2 protection in a single, ready-to-use unit. The blue/grey facepiece is made from soft, non-allergenic TPE, offering a secure fit with a low profile that keeps your field of vision clear.

Highlights

• Integrated A1P2 R D filter—no separate cartridges to attach or replace
• Protects against organic gases and vapours (boiling point > 65°C), fine dusts, and oil/water-based mists
• Low breathing resistance parabolic exhalation valve reduces heat and moisture build-up
• Adjustable head cradle and neck straps for a stable, personalised fit
• Dolomite-tested (D) for extended clogging resistance in dusty environments
• Maintenance-free: dispose of the mask when filters are exhausted
• Soft, non-allergenic TPE facepiece is silicone-free

In daily use

The 4251+BC1 is ideal for painting, solvent handling, woodworking, chemical handling, and cleaning. Its one-size design fits most medium/large faces, and the low-profile shape works well with eyewear and other PPE. Because the filters are built in, you never need to worry about correct cartridge installation—just put it on and start working. The exhalation valve keeps breathing easy even during extended wear, and the adjustable straps ensure a comfortable seal without pressure points.

Full specifications

• Protection class: FFA1P2 R D
• Filter type: Integrated, maintenance-free
• Protection against: Organic gases and vapours (boiling point > 65°C), fine dust, oil/water-based mists
• Standards met: EN 405:2001+A1:2009
• Facepiece material: Soft, non-allergenic thermoplastic elastomer (TPE)
• Valve type: Low breathing resistance parabolic exhalation valve
• Strap system: Adjustable head cradle and neck straps
• Maintenance: Maintenance-free (disposable when filters are exhausted)
• Design: Low profile for enhanced peripheral vision
• Size: One size fits most (Medium/Large)
• Colour: Blue/Grey
• Reusability: Reusable until end-of-life indicator or filter saturation
• Typical applications: Painting, solvent handling, woodworking, chemical handling, cleaning
• Dolomite test (D): Yes, for extended clogging resistance
• A1 rating: Protects against organic gases and vapours with boiling point > 65°C up to 1000 ppm or 10 x OEL
• P2 rating: Protects against medium level fine dusts and oil/water based mists up to 10 x OEL
• Integrated filters: Yes, no need for separate filter attachment
• Silicone-free: Yes

Final note

The 3M 4251+BC1 combines reliable A1P2 protection with a maintenance-free design, making it a practical choice for professionals who need dependable respiratory protection without the hassle of filter changes.