A Lesson in Math and Efficiency
Why is it that certain coatings will cover more square feet at the same thickness, especially if there are no solvents to speak of that would evaporate and leave a thinner coating behind? How can 10 gallons of materiel cover 250 ft² at 1/16″ thickness with one system and another only cover 200 ft² with a different system?
Well, you’re about to find out. (Hint: It has to do with how the material is delivered)
1 cubic foot = 7.48052 US gallons
1 US gallon = 0.13368 cubic feet
that means that if I have a regular kit of Vortex material (10 gallons), times 0.133685 cubic feet per gallon [10gal x 0.133685 ft³/gal = 1.3368 ft³]. Let’s assume that rather than our material sitting in two five gallon buckets, we have one Cuboid (Rectangular Cube) with a volume of 1.3368 ft³, that has dimensions of 1′ x 1′ x 1.3368′.
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If you then took this 1.3368ft³ Cuboid of material, and cut it into sheets of desired thickness, for our case, we’ll use [1/16" = (0.0625 iches) = (0.0052083 feet)].
[1.3368ft³ / 0.0052083' = 256.6656ft²].

Essentially, this means that if you poured 10 gallons of any material onto a surface at exactly 1/16″ thickness, it would cover 256.6656ft² of that surface. So why does material not really go that far? If you look at most high pressure systems, you will see that the increased pressure over-atomizes the coating material so that it simply floats away. These systems can waste 20-30% of your material. At only a 20% loss (80% efficiency), the impact can be staggering. [256.6656ft² * 80% = 205.3325ft²]. This is why Vortex uses a High Volume, Low Pressure (HVLP) design. This design has only about a 2% loss of material (98% efficiency) so you have more material where you want it. [256.6656ft² * 98% = 251.5323ft²] 251ft² covered compared to 205ft² means Vortex provides a costs savings to you!
This can add up to huge savings very quickly. Think about it, what if every time you bought 5 pails (or drums) of material, you tossed one in the trash? That’s essentially what you’re doing with a high pressure system, except in this case, you’re putting that material in the air around you, making a large mess and potentially a health hazard.







