Most flexible varnish; natural UV resistance; best recoat adhesion

Softer than other varnishes; reddish color; slower drying

Brightwork on boats (but not decking or below the waterline), patio furniture, exterior doors

Interior Polyurethane

Oil-derived resin

1 to 4

6 to 8

Least expensive poly varnish; very durable; good scratch and heat resistance

May not resist UV degradation

Counter and bar tops, kitchen cabinets, tabletops, high-wear interior surfaces, interior doors and woodwork

Exterior Polyurethane

Oil-derived resin; UV blockers, light stabilizers

6 to 8

12 to 16

Very durable; protects wood from sunlight; resists UV degradation

More expensive than interior mixtures

Interior and exterior doors, patio furniture, any high wear furniture

Polyurethane floor coatings

Oil-derived resin, plasticizers

8 to 12

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Wood Working 101

Wood Working 101

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