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Dry Film thickness: thickness of an applied coating when dry, often
expressed in mils or microns (Ref. Industrial Maintenance Coatings
Glossary, SSPC 94-16).
Theoretical coverage: the spreading rate of a coating without
consideration of waste or loss. Usually 10% is attributed to waste
or loss.
Spreading rate: The area of surface covered per coat at a specified
dry film thickness per unit volume of coating material. Spreading
rate generally is indicated by square feet covered per gallon or
square meter covered per liter. (Ref. Industrial Maintenance
Coatings Glossary, SSPC 94-16).
Solids by volume: The volume of the nonvolatile portion of a coating
composition divided by the total volume, expressed as a percent
(Ref. Industrial Maintenance Coatings Glossary, SSPC 94-16). The
applicator needs to know the solids by volume to determine the
spread for a given area. The solids content by volume of ASTEC #900
is 55%.
Solids by weight: The weight of the nonvolatile portion of a coating
composition divided by the total weight of the liquid coating,
expressed as a percent (Ref. Industrial Maintenance Coatings
Glossary, SSPC 94-16). The manufacturer needs to know the solids by
weight to determine if the coating has been made properly.
ASTEC with 55% solids by volume, the dry film thickness (DFT) will
be 55% of the wet film thickness.
| 1 | mil | = | 1604 sq. ft | [149m2] | x | 55% | = | 882 ft [82.0 m2] |
| 2 | mils | - | 802sq.ft | [74.5m2] | x | 55% | = | 441 ft [41.0 m2] |
| 3 | mils | - | 535sq.ft | [49.7m2] | x | 55% | = | 294 ft [27.3 m2] |
| 4 | mils | = | 401 sq. ft | [37.3m2] | x | 55% | = | 221 ft [20.5 m2] |
| 5 | mils | = | 321sq.ft | [29.8m2] | x | 55% | = | 176 ft [16.4 m2] |
| 6 | mils | = | 267sq.ft | [24.8m2] | x | 55% | = | 147 ft [13.7 m2] |
| 7 | mils | = | 229sq.ft | [21.3m2] | x | 55% | - | 126 ft [11.7 m2] |
| 8 | mils | = | 201sq.ft | [18.7m2] | x | 55% | = | 110 ft [10.2 m2] |
| 9 | mils | = | 178sq.ft | [16.5m2] | x | 55% | - | 98 ft [9.1 m2] |
| 10 | mils | - | 160sq.ft | [14.9m2] | x | 55% | = | 88 ft [8.2 m2] |
| 11 | mils | = | 146sq.ft | [13.6m2] | x | 55% | = | 80 ft [7.4 m2] |
| 12 | mils | = | 134sq.ft | [12.4m2] | x | 55% | = | 74 ft [6.8 m2] |
| 13 | mils | = | 123 sq. ft | [11.4m2] | x | 55% | = | 68 ft [6.3 m2] |
| 14 | mils | = | 115sq.ft | [10.7m2] | x | 55% | = | 63 ft [5.9 m2] |
| 15 | mils | = | 107sq.ft | [9.9m2] | x | 55% | = | 59 ft [5.5 m2] |
| dft = wet film thickness (wft) X percent solids by volume | ||||||||
