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Woodworking Math

Oil-based polyurethane

General Finishes Arm-R-Seal

The figures General Finishes prints for General Finishes Arm-R-Seal on its own data sheet, at the conditions it names. Where the sheet doesn't give a figure, this page says so rather than borrow one from another product.

Dry to the touch
12+ h
Recoat
24+ h
Ready for use
Not on the sheet we read
Full cure
30 days
Coverage
up to 500 sq ft per gallon
Thinning
Mineral spirits
VOC
All sheens under 577 g/L
Conditions
70 °F, 50 % RH
Indoors or out
Interior
Food contact
The sheet we read makes no food-contact statement

One source: General Finishes, the maker of that product

From the sheet: A thin oil-based topcoat GF says to apply in thin coats with a rag.

What the maker names it for

Against its kind

General Finishes Arm-R-Seal is one of the products in oil-based polyurethanes; here is that kind across every maker we have read.

Oil-based polyurethanes: recoat across makers

4 h

span 3–24 h

Median of 3 sources

Oil-based polyurethanes: coverage across makers

500 sq ft/gal

span 500–700 sq ft/gal, per coat

Median of 3 sources

Related

Work it out for your project

Sources

  1. General Finishes, Arm-R-Seal technical data sheet (March 2020, dealer-hosted copy), read 2026-11-07.

How the tags work: How we source every number.