What are the Major Types of Polyurethane?

What are the Major Types of Polyurethane?

Two-Component Polyurethane Lacquer Wood for Interior and Exterior Use

They consist of polyol made from hydroxylated resins that can be acrylic, polyester-free of oils and modifications, and hardener, made from TDI, MDI IPDI and a glycol.

Mono-Component Polyurethane for Wood Floors

It has excellent hardness and flexibility and it is made from TDI-glycol. The drying of this is produced by reaction with the ambient humidity which acts as the catalyst for the drying process.

Urethane Alkyd Polyurethane Varnish

It is made from urethanized alkyd resins with TDI-IPDI and oils such as linseed and soy. Its handling is very widespread in Europe and the United States for domestic uses. Its resistance is much lower than the previous ones and also its cost, but it surpasses in physical and chemical qualities of drying to the enamels and alkyd polyurethane varnishes available in the South American market.

Outer Lacquer

It is recommended for exposed woods such as cabins, doors and windows. Its properties and characteristics include excellent gloss, scratch and detergent resistance, abrasion, weathering and solvents. It protects and embellishes.


It is polyurethane lacquer finish and good for all the types of wood. It can be used outdoors as well as indoors and it can protect the wooden objects or accessories very well. Its properties and characteristics include high hardness and mechanical and chemical resistance. It has high gloss, so it makes the smooth surfaces with only two or three coats of polyurethane.

Lacquered Floors

It is the polyurethane lacquer for maximum protection of interior wood floors and it features the protection against abrasion, solvents, acidic solutions, caustic soda and chemicals with excellent brightness. There is no need to make a coat with wax. It has easy maintenance. For a product of any type mentioned here, please visit the ReviewGurus.

Application and Drying Recommendations

According to the experts and the companies that manufactures polyurethane recommend that it is necessary to condition them by placing water traps or silica filters whose function is to retain water from the tank to the gun. In this sense, the HVLP equipment is suitable as it does not present humidity problems.

Direct air equipment is not recommended for the application of polyurethane for the reason that they can give bad finishes and register in the application a waste of up to 40%. In the matter of drying, they warn that the process can be made outdoors and preferably in free of any contamination. The transport of the furniture is recommended after 6 to 8 hours of drying.


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