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Introduction to UV Wood Finish

Release time:

2026-04-02 07:00

In a UV wood coating system, the topcoat is the outermost layer of paint, directly exposed to the service environment and the user’s visual perception. Unlike the primer, which primarily provides filling and sealing functions, the topcoat serves the dual purpose of decoration and protection. Understanding the definition, functions, and main types of UV wood topcoats is crucial for making appropriate selections.

I. Definition

UV wood topcoat is a surface coating for wood products that cures upon exposure to ultraviolet light and forms the outermost layer of the coating system. Unlike putty and primer, topcoats contain no inorganic fillers (except matte topcoats, which require the addition of matting agents), enabling the formation of a clean, dense film that directly determines the final appearance and performance of the finished product.

From a functional standpoint, the topcoat is the outermost layer of the coating system, directly exposed to the atmosphere and subject to light exposure, temperature fluctuations, mechanical abrasion, and chemical corrosion. Consequently, the performance requirements for the topcoat differ fundamentally from those of the primer: while the primer focuses on filling, sealing, and adhesion, the topcoat emphasizes aesthetic appearance and surface durability.

II. Functions

UV wood finish primarily serves the following functions:

1. The primary function of the topcoat is decorative. It imparts specific gloss levels, colors, and tactile qualities, directly influencing the product’s initial visual appeal. High-gloss topcoats deliver a mirror-like finish, creating a sleek and radiant appearance, while matte topcoats offer a soft, smooth texture that feels pleasant and comfortable to the touch.

2. Protective performance is the core value of topcoats. As the outermost layer of the coating system, the topcoat directly endures everyday wear and tear, including scratches, impacts, contamination, and aging. Therefore, it must exhibit high hardness, scratch resistance, chemical resistance, and yellowing resistance to provide long-lasting protection for wood.

3. The performance of the topcoat is the result of the synergistic interaction between the topcoat and the primer. The topcoat adheres to the primer and must form strong intercoat adhesion; at the same time, the decorative appearance of the topcoat depends on the smooth substrate provided by the primer.

III. Main Types

1. High-gloss topcoat: This refers to a UV-cured wood finish with a high degree of gloss, which, upon curing, produces a mirror-like reflective effect. High-gloss topcoats exhibit excellent transparency, fully showcasing the natural wood grain or the vivid coloration of solid-color coatings, making them ideal for high-end furniture, piano casings, and other products with extremely stringent aesthetic requirements. However, they demand exceptionally smooth substrate surfaces; even minor imperfections can be significantly amplified.

2. Matte topcoat: refers to a UV-cured wood finish with low gloss, which delivers a soft, understated visual effect after curing. Matte topcoats exhibit high tolerance for imperfections in the underlying substrate, offer a smooth, silky feel, and provide excellent resistance to fingerprint smudging, making them widely used in residential furniture, kitchen cabinets, flooring, and other applications.

3. High-Gloss White Topcoat: This is a specialized category within the high-gloss topcoat family, designed for achieving a high-gloss finish in solid white coatings. A high-gloss white topcoat must deliver a mirror-like, high-gloss appearance while maintaining excellent whiteness and color stability; it also demands strong hiding power and superior resistance to yellowing. It is ideally suited for high-end white furniture, cabinet doors, and similar applications.

IV. Conclusion

UV wood topcoat is the final layer in the coating system, directly determining the product’s ultimate appearance and service life. Its definition encompasses both its compositional makeup and its position within the coating sequence, while its functions cover decoration, protection, and compatibility. Gloss topcoats aim for a mirror-like finish and high transparency, making them suitable for high-end decorative applications; matte topcoats prioritize a soft tactile feel and excellent fingerprint resistance, and are widely used in residential furniture; and glossy white topcoats are specially formulated to achieve a high-gloss effect in solid white coatings. In practical applications, the choice of topcoat type should be based on the product’s intended use and service environment, with careful attention paid to ensuring proper compatibility with the primer.

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Bossin Recommended Products – UV Wood Coatings
Glossy topcoat
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-113	Bisphenol A epoxy acrylate	High hardness, high gloss, high fullness, containing 20% TPGDA
B-163	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-165	Modified epoxy acrylate	Good flexibility and strong adhesion
B-21C	Active amine photosensitizing promoter	Low color number, antioxidant and anti-polymerization, and enhanced curing rate
B-301	Aromatic Polyurethane Acrylate	Fast curing, excellent toughness, and good grindability.
B-302	Aromatic Polyurethane Acrylate	Fast curing, high strength, good toughness, and excellent grindability.
B-574C	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and excellent cost performance.
B-609	Aliphatic polyurethane acrylate	Fast curing, high hardness, scratch resistance, and chemical resistance.
B-868	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-910A2	Aliphatic polyurethane acrylate	Low viscosity, yellowing resistance, chemical resistance, and steel-wool resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
Matte topcoat
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-160D	Modified epoxy acrylate	Good flexibility, yellowing resistance, and strong adhesion.
B-163	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-21C	Active amine photosensitizing promoter	Low color number, antioxidant and anti-polymerization, and enhanced curing rate
B-328M	Aliphatic polyurethane acrylate	Low gloss, low viscosity, excellent wettability, and a pleasant hand feel.
B-328R	Aliphatic polyurethane acrylate	Low gloss, excellent matting, good wetting, and a fine, smooth, and silky hand feel.
B-333	Aliphatic polyurethane acrylate	Low viscosity, excellent matting performance, good wetting, and excellent flexibility.
B-572	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
B-650A	Aliphatic polyurethane acrylate	Low viscosity, excellent matting effect, fast curing, and good wettability.
B-868	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-910A2	Aliphatic polyurethane acrylate	Low viscosity, yellowing resistance, chemical resistance, and steel-wool resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
Bright White Finish
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-113	Bisphenol A epoxy acrylate	High hardness, high gloss, high fullness, containing 20% TPGDA
B-160D	Modified epoxy acrylate	Good flexibility, yellowing resistance, and strong adhesion.
B-301	Aromatic Polyurethane Acrylate	Fast curing, excellent toughness, and good grindability.
B-302	Aromatic Polyurethane Acrylate	Fast curing, high strength, good toughness, and excellent grindability.
B-560	Polyester acrylate	Fast curing and excellent pigment wetting
B-574C	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and excellent cost performance.
B-868	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
Individual Recommendation
Product Model/English Abbreviation	Product Name/Product Type	Product Features
BM2223 (TPGDA)	Di(propylene glycol) diacrylate	Good flexibility and low volatility
BM2224 (EO-HDDA)	Ethoxy-1,6-hexanediol diacrylate	Excellent adhesion to plastics, good dilutability, and low volatility.
BM3231 (TMPTA)	Trimethylolpropane triacrylate	High crosslink density, high hardness, high gloss, and excellent wear resistance.
BM3235 (PET3A)	Pentaerythritol triacrylate	Fast curing, high crosslink density, high hardness, and excellent chemical resistance.
BM3380 (3EO-TMPTA)	Ethoxylated trimethylolpropane triacrylate	More flexible and less irritating than TMPTA.
BM6261 (DPHA-80)	Dipentaerythritol hexaacrylate	High crosslink density, high hardness, chemical and wear resistance, and water resistance.
BM6263 (DPHA-90)	Dipentaerythritol hexaacrylate	High crosslink density, high hardness, chemical and wear resistance, and water resistance.

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Detailed Explanation of the Function of UV Wood Finish Coatings

Disadvantages of UV Wood Primer