Calculating Coating Thickness in Mils
I was recently asked by a client about the thickness of our epoxy floor coatings. I was stumped because I usually quote in square feet per gallon rather than mils. Anyway, I thought it would be interesting to do some research and here is what I found.
Many clients want to know the thickness of our epoxy coatings in mils. A simple way to calculate this is based on the following:
One gallon of 100% solids material will coat 1,604 square feet at 1 mil.
Based on this specification we can calculate that one gallon of 100% solids material covering 100 square feet will be 16 mils thick (1604/100).
250 square feet per gallon will provide a coating 6.4 mils thick.
If a client asks for a 10 mil coating of 100% solids epoxy, the coverage rate will need to be 160 square feet per gallon.
If the solids content is less than 100% just reduce the coverage accordingly. For example, 125 square feet per gallon on 75% solids material will provide a coating 9.6 mils thick ((1604/125) x 0.75).
If you need to quote a thickness in Metric (The rest of the world is still using the Metric system) multiply the mils thickness by 0.0254 to get the thickness in mm. For example, 16 mils will be 0.4 mm.
I hope you find this useful.
Robin Leigh – Elite Concrete Systems.
860 307 9499
