Gillfab® 4109


Gillfab® 4109 is a low smoke flooring panel made from unidirectional carbon fiber reinforced phenolic facings bonded to Gillcore® HD meta-aramid honeycomb.


Designed for use as flooring in cabin compartments of commercial aircraft.


  • Low smoke evolution in a fire
  • Very light weight and low deflection
  • Optional thin layer of fiberglass to prevent galvanic corrosion
  • Service temperature to 180°F (80°C)


Type 1/Grade MType 2/Grade L
Thickness, inch (mm)0.250 (6.35)
0.390 (9.91)
0.400 (10.16)
0.250 (6.35)
0.390 (9.91)
0.400 (10.16)
Facing, face/back, inch (mm)0.014/0.014 (0.356/0.356)0.014/0.014 (0.356/0.356)
Length, inch (mm)Typical 96 (2,438), Maximum 144 (3,658)
Width, inch (mm)Typical 48 (1,219), Maximum 60 (1,524)
HoneycombMedium-density Gillcore® HD meta-aramid honeycombLight-density Gillcore® HD meta-aramid honeycomb


Adhesive: Epoxy film

Core: Light and medium-density Gillcore® HD honeycomb

Facings Reinforcement: Unidirectional carbon fiber

Facings Resin System: Phenolic


  • McDonnell Douglas Dwg. No. 7954400, Ty. 1 and 2
  • British Aerospace BAER 3231, Gr M & L
  • FAR 25.853a – fire resistance

Alternative Gill Products

TGC Product No.Difference
Gillfab® 4004Panel made from Gillcore® HD core and unidirectional fiberglass reinforced with phenolic resin. An economical alternative of Gillfab 4109.
Gillfab® 4009Panel made from Gillcore® HD core and unidirectional carbon fiber reinforced with epoxy resin. Higher mechanical strength and higher in smoke generation.
Gillfab® 4509Panel made from Gillcore® HD core and unidirectional carbon fiber reinforced with phenolic resin. The panel uses phenolic film adhesive in place of epoxy adhesive.

Performance Properties, Typical

The following tests are run in accordance with DAC 7954400 specification requirements.

TGC Part Number4109 Ty 1/Gr M4109 Ty 2/GR L
Panel Weight, psf (kg/m2) 0.513 (2.50)0.416 (2.03)
Panel Thickness, inch (mm)0.385 (9.78)0.390 (9.91)
Impact Resistance, in-lbs (N-m)41 (4.63)N/A
Panel Compression, psi (Mpa)2,027 (13.98)N/A
Long Beam Bending, lbs (N)553 (2,460)432 (1,922)
Deflection at 100 lbs, inch (mm)0.24 (6.10)N/A
Drum Peel, in-lbs/3″ width (N-m/76mm width)43 (4.86)44 (4.97)
FlammabilityMeet FAR 25.853 App F Part I (a)(1)(i)

Figures shown reflect typical values and should not be used as design specifications.

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