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Woodworking Math

Oil-based polyurethane

Varathane Oil-Based Interior Polyurethane

The figures Rust-Oleum (Varathane) prints for Varathane Oil-Based Interior Polyurethane 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
Not on the sheet we read
Recoat
4 h
Ready for use
24 h (light use)
Full cure
Not on the sheet we read
Coverage
150–175 sq ft per quart
Thinning
Not on the sheet we read
VOC
Max 450 g/L
Conditions
Apply at 55–90 °F
Indoors or out
Interior
Food contact
The sheet we read makes no food-contact statement

One source: Rust-Oleum (Varathane), the maker of that product

From the sheet: The 450 VOC formula; recoat only when the coat has dried clear and feels hard; dries slower on redwood, cedar and other oily woods.

Against its kind

Varathane Oil-Based Interior Polyurethane 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. Rust-Oleum (Varathane), Oil-based interior polyurethane (450 VOC), quart label, read 2026-11-08. A retailer-hosted copy of the label

How the tags work: How we source every number.