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Silicone roof coating (dry film)

Its weight

The table
16 lb a squareThe sources give 16 to 16 lb.
Loose volume
Not known: it counts in the tons aloneA coating leaves no loose debris but its empty pails; no volume applies.
How it was chosen
A coating is laid on, not torn off: the figure is the cured film it adds. Uniflex calls for 2 gallons a square; Polyglass's silicone weighs 10.2 lb a gallon at 80% solids by weight, so 2 x 10.2 x 0.80 = 16 lb a square. Only one rate and one density were found.

Your figure

None: estimates use the table's.

Give your own figure
For each square of roof, or each sheet of decking.
Loose, as it lands in the dumpster, for each square or each sheet.
Your scale tickets, your hauler's figures: what a reader would check it against.

2 sources

  1. Silicone 22 Rubberized Silicone Roof Coating, data sheet

    Uniflex (The Sherwin-Williams Company) · manufacturer spec sheet · read 2026-10-23

    "If one coat application is desired, apply 1 coat at 50 sq/ft per gallon. If applying in 2 coats, apply each coat at 1 gallon per 100 sq/ft. Finished coverage will be the same, at covering 250 sq/ft of roof surface per 5 gallon bucket."

    The document

  2. Roof Silicone, Silicone Roof Coating, Product Data Sheet

    Polyglass U.S.A. · manufacturer spec sheet · read 2026-10-23

    TYPICAL PHYSICAL PROPERTIES: "Weight/gal (lb) 10.2" "Solids Weight (%) 80 +/-2" "Solids Volume (%) 69 +/-2"

    The document An archived copy