Minwax Helmsman Spar Urethane
The figures Minwax (Sherwin-Williams) prints for Minwax Helmsman Spar Urethane 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 (normal use)
- Full cure
- Not on the sheet we read
- Coverage
- 125 sq ft per quart
- Thinning
- Not on the sheet we read
- VOC
- Not on the sheet we read
- Conditions
- Not on the sheet we read
- Indoors or out
- Interior and exterior
- Food contact
- The sheet we read makes no food-contact statement
One source: Minwax (Sherwin-Williams), the maker of that product
From the sheet: UV blockers; 3 coats outdoors or on bare wood. Recoat is the page’s spec figure; its directions say to let each coat dry at least 6 hours before sanding.
Against its kind
Minwax Helmsman Spar Urethane is one of the products in outdoor clear finishes; here is that kind across every maker we have read.
Outdoor clear finishes: recoat across makers
4 h
span 2–8 h
Median of 3 sources
Outdoor clear finishes: coverage across makers
570 sq ft/gal
span 380–760 sq ft/gal, per coat
Median of 3 sources
Related
- Every product of this kind: spar urethane
- If it goes wrong: bubbles in polyurethane, brush marks, dust nibs, sticky or tacky finish, cloudy or white finish (blushing), cracking or crazing
- How much to buy: finish coverage calculator
- Every finish side by side: finish dry time chart
- What the federal rules say about finishes and food: food-contact finishes
Work it out for your project
- Plan your coats of this finish
Pick the piece and the wood, then get a dated coat schedule from the product’s own sheet.