Fibre-Metal by Honeywell 4178CL Face Shield Window

Fibre-Metal by Honeywell 4178CL Face Shield Window Review

Impact protection and splash protection are different tests. ANSI Z87.1 rates spectacles for impact, but only a device marked for splash (D3) is evaluated against a chemical splash hazard; safety glasses with open sides do not qualify, and a face shield is a secondary protector worn over primary eye protection rather than instead of it.

The FIBRE-METAL 4178CL is an ANSI Z87.1-compliant safety face shield designed for general manufacturing, maintenance, and industrial operations. Built with optical-grade lens material, it provides full-face coverage from brow to below the chin line — protecting the face, cheeks, and jaw from hazards that safety glasses and goggles cannot address alone. It is designed for use with compatible face shield headgear assemblies. Face shield windows are injection molded from propionate, which is superior to other window materials in every significant performance characteristic (per Fibre-Metal).

Read the full Fibre-Metal by Honeywell 4178CL Face Shield Window review →

Construction and Materials

The lens window is constructed from hard-coated optical-grade material providing impact resistance and surface durability. They are preformed at the factory to the exact curve of our crown protectors for easy installation. The lens window extends coverage across the full frontal face profile, with side flanges or curved geometry providing lateral protection beyond the direct forward field. The construction meets ANSI Z87.1 basic-impact requirements for general industrial use.

Compliance and Ratings

Rated to ANSI Z87.1 and OSHA 1910.133 for impact and particle hazard environments. ANSI/ISEA Z87.1 is the governing standard for eye and face protective devices in U.S. workplaces; OSHA 29 CFR 1910.133 mandates its use in workplace environments where eye or face hazards exist. For compliance programs, face shields should be used as part of a layered eye and face protection strategy per OSHA PPE hierarchy requirements. All High Performance windows are .060 in thick for an extra margin of protection, yet cost no more than ordinary .040 in windows (per Fibre-Metal).

Performance

In general manufacturing and maintenance environments, face shield use is indicated wherever flying particle, liquid splash, or projectile hazards exist beyond what eyewear alone addresses. The shield extends coverage to the cheeks, chin, and brow — areas not covered by safety glasses or goggles. Made in Mexico. Maintaining lens cleanliness and replacing lenses when scratched preserves visibility quality critical for precision work.

Strengths

• Hard-coated lens provides ANSI Z87.1 impact-rated protection for safety applications
• Optical-grade lens material maintains visibility clarity without distortion at working distances
• Compatible with standard face shield headgear assemblies for flexible deployment
• Window only — requires a compatible Fibre-Metal F400/F500 crown (sold separately) for crew-level deployment
• Full-face coverage from brow to below the chin protects areas not covered by eyewear alone
• Single-unit design simplifies inventory and procurement

Limitations

• Face shields do not provide complete eye protection as standalone devices against chemical splash or fine particle hazards — OSHA 1910.133 requires appropriate safety glasses or safety goggles underneath the face shield in chemical and grinding environments
• Lens scratching from abrasive contact degrades optical clarity over time; replacement lenses should be sourced when transmission quality decreases
• One-size-fits-most headgear may not accommodate all head sizes or hard hat combinations; verify compatibility with the helmet platform before crew-scale procurement

Recommended Use Cases

Manufacturing assembly lines; maintenance and repair operations; carpentry and general construction; food service and processing (splash protection); healthcare (droplet barrier); any work environment with documented flying particle or splash hazards. This face shield is appropriate for any OSHA-regulated workplace where face and eye hazard assessments document a risk requiring face shield-level protection.

Verdict

The FIBRE-METAL 4178CL face shield delivers ANSI Z87.1-compliant protection for safety applications in a hard-coated construction suited for industrial and occupational environments. Buyers should confirm the specific model matches their headgear platform and application requirements before crew-scale procurement. For alternative face shields options across brands and protection levels, or for paired eye protection — safety glasses and safety goggles — explore the full WC Safety protective equipment range.

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Written by Steven Eaton, WC Safety editor. WC Safety is an independent PPE review site, holds no inventory and sells nothing directly; Amazon links are affiliate links that earn a commission at no cost to you and never affect the assessment. This page is not medical, legal or regulatory advice.

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