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Octagon Wet Film Thickness Gauges

Article No. 14089

Octagon Wet Film Mil Gauge 0.4-400 Mil

The Octagon Wet Film Thickness Gauge with 8 different sides with mil and micron scales. Its uses range from measuring wet film thickness of fiberglass lay-ups to food glazes and wet coatings that are sprayed, dipped or brushed onto a smooth surface.


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CLICK HERE for Custom Order Form

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$10.00 excl. taxes & shipping cost


  • Precision made of hard aluminum in the U.S.A. by Gardco.

  • Calibration is traceable to N.I.S.T.

  • All Purpose Range From 0.4 to 400 Mils

  • Meets and exceeds ASTM D4414 “Standard Practice For Measurement Of Wet Film Thickness Of Organic Coatings By Notched Gauges”.

  • Complies with ANSI/NCSL Z540-1 and ISO 9000 when ordered with calibration certification.

  • Can be custom made by screen or digital printing with your logo or photograph in up to FIVE colors. 

  • Applications: Fiberglass lay-ups, Chopper gun lay-ups, Roof coatings, Resins, Food glazes, Batters, Tar, Uncured powder, Oils, Paints, Varnishes, Lacquers, Highway Paint, Adhesives, Waxes, Gunk, Shellac, Gel coats, Airplane wing de-icers, Centrifugal castings, Inks, Bitumens, Fiberglassers, Chopper Gun Users, Chemists, Technicians, Inspectors, Builders, Engineers, Food Batter Chefs, Decorators, Airplane De-Icers, Students, Colleges, Bridge Painters, Boat Builders, Lab Personnel, Painters, Roofers, Corrosion Engineers, Road Painters, Bakery Glazers

Technical Attributes

  • Data
    Scales:Mil - Micron
    Dimensions:4-1/2” x 4-1/2” x 0.32”
    Range:0.4 to 400 mils / 10 to 10,000 μm
    Fiberglass Lay-up Range:25 to 158 mils
    Material:Hard Aluminum
    Specifications:Exceeds ASTM D4414
    Accuracy:± 0.25 mils Average (Range 0.4 - 400 mils)
    Mil Scale
    Micron Scale

More Information

To order Custom Octagon Gauges:

  1. Download Custom Gauge Form Here
  2. Read Gauge Order Form carefully, and fill out as completely as possible
  3. Select ALL options desired
  4. Include special notes in “Comments/Additional Information”
  5. Email completed form to: gauges.gardco@altana.com
  6. Attach high resolution logo and/or artwork to be printed
  7. Digital artwork should be 600dpi resolution
  8. Acceptable artwork formats include: png, psd, and ai files
  9. Specify font name or attach fonts when available
  10. After Order is placed, you will receive a color gauge proof for final review before printing

Custom Gauge Pricing Here. For Special PMS Colors there is an additional charge per color. Custom Calling Card Gauges are non-returnable items, and are subject to final sale.


Meets and exceeds ASTM D4414 Complies with ANSI/NCSL Z540-1 and ISO 9000 when ordered with calibration certificate.


  1. Select scale range (25-158 Mil Fiberglass Scale range)
  2. Place gauge on wet film at 90° angle.
  3. Press into film
  4. Withdraw and note deepest tooth or notch having paint on it and next higher tooth that is not coated.
  5. The wet film thickness lies between these two readings.
  6. Clean gauge with any suitable solvent immediately after use. Wipe dry. Do not leave gauge immersed in solvent.

For Clear Coatings

  • To see clear liquids on the teeth, sprinkle them with talc and blow off. Talc will stick to the wet teeth.
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