2 parts PU lacquer
2 parts PU lacquer
A polyurethane coating is comprised of two major components: a base resin, which can be acrylic, polyether or polyester and a hardener. A polyurethane paint film is formed when those two components chemically react. Other ingredients such as pigments, solvents, leveling agents and thickening agents can also be included. Polyurethane varnishes are typically hard, abrasion-resistant, and durable coatings.
They are popular for hardwood floors but are considered by some wood finishers to be difficult or unsuitable for finishing furniture or other detailed pieces. Polyurethanes are comparable in hardness to certain alkyds but generally form a tougher film. Compared to simple oil or shellac varnishes, polyurethane varnish forms a harder, decidedly tougher and more waterproof film.
|The life cycle||Pro||Con|
Production of polyurethane is a polluting process.
Polyurethane is energy intensive to produce. If you want to use it choose water based, which is also better in terms of offgassing.
Low amount of VOCs. The hardener in the paint can irritate human skin and cause an allergic reaction that results in eczema. The paint can also cause allergic asthma for painters that regularly spray two-component polyurethane paints.
The paint has a relatively high price.
After the two components are mixed it cannot be stored for reuse.
Nonreactive when cured.
Compared to single component polyurethane it has higher durability, waterproof and hardness. It is highly resistant to weather influences, water and chemical ingredients, scratch resistant, non-yellowing and preserves gloss. Its flexibility, hardness and durability makes it suitable as floor coating (even for slightly sagging floor).
It is an hazardous waste and must throw away once mixed the 2 parts.
Examples on Superuse.org
Examples on Harvestmap.org