Nippon Electric Glass

• ▸Country: Japan
• ▸Founded: 1944
• ▸Speciality: Technical and specialty glass - fire-resistant, borosilicate, specialty architectural
• ▸Architectural products: Fire-resistant glass, specialty glazing panels
• ▸Market: Commercial, institutional, and industrial - Japan and international
• ▸Website: neg.co.jp

• ▸Pyroswiss / fire-resistant glass
• ▸NEG Functional Glass
• ▸Architectural specialty panels

Fire-resistant glass is the primary Nippon Electric Glass product encountered in professional window cleaning. This glass is engineered to resist fire for a rated period - typically 30, 60, or 90 minutes. Its surface is standard glass from a cleaning perspective, but the framing and intumescent seals around the glass must not be disturbed. Wired fire-resistant glass - the older product with an embedded wire mesh - has a textured surface and joints at the wire-glass boundary that collect grime. These areas require particular attention in cleaning.

This is how I clean Nippon Electric Glass windows. The tools and technique below come from 25 years of daily professional work on the glass. Every step has been tested on real installations and adapted specifically for Nippon Electric Glass systems.

• ✕Do not disturb intumescent seals around fire-rated glass - this is a fire safety issue, not a cleaning issue
• ✕Do not use abrasive pads on fire-rated glass surfaces
• ✕Do not use alkaline or acidic cleaners on fire-rated glass framings - the seals around this glass are often silicone or intumescent compounds that are sensitive to chemistry
• ✕Do not pressure wash into fire-rated glass frame joints

Bundle Kit

Pro KitThe full professional setup. Brass squeegees, T-bar with applicator cover, tool belt, rags, soap, and bucket. Everything from the daily tool list in one box.Shop now →

Tool Recommendations