BMC Fiberglass Box | Non-corrosive, Non-conductive, No Grounding Required, 2-Hour Fire Rated

• ETL Certified 2-Hour Fire Rating:All fiberglass boxes are ETL certified and suitable for walls or ceilings with a 2-hour fire resistance rating.

  
  

• Real-world fire testing: In real-world fire tests conducted at ETL laboratories according to UL263 standards, the products fully meet all testing requirements.

  
  

• Key differentiation — no additional fire protection layer:

  It can be directly installed in the same wall hole of the fire-resistant wall

  No putty pad required

  No need for mineral wool insulation layers

  No other construction plans are needed

  
  

• Compared to traditional solutions:ordinary plastic boxes have installation restrictions within firewalls, whereas fiberglass boxes can be installed compliantly within the same wooden frame.

  
  

• Tested models include: FGB237, FGB356, FGB475 (deepest 1-4 digits), and round FGBR22.5, among others

• Industry pain point: In townhouse and duplex housing projects, the Party Wall must meet a 2-hour fire resistance rating. Traditional standards require that electrical boxes cannot be installed back-to-back and must be staggered by at least 12 inches.

  
  

• Fiberglass box solution: The above models, which have passed a 2-hour fire resistance test, support back-to-back installation—no misalignment or additional fireproof materials.

  
  

• Customer Value:

  Saves wall space

  Reduce material and labor costs

  No additional grounding is required

Fiberglass boxes share the same three major features as competing products on the market, but with superior performance:

1. Fire Protection Certification
   (2-hour ETL certification — core advantage)

2. Soundproofing
   (no additional soundproofing material required)

3. Airtightness
   (prevents air leaks, blocks moisture and heat loss)

Special reminder: Models with the suffix "VS" (Vapor Seal) use vapor sealant, suitable for single-layer drywall applications, featuring moisture resistance, thermal insulation, heat insulation, and sound insulation.