Exterior water-based wood paint – Solution for extreme weather

Unknown to many, exterior water based paint actually outshine solvent based Polyurethane (or PU) in term of anti UV, flexibility, water resistant and anti fungal.

Compared to PU, exterior water based has stronger anti UV properties to prevent discoloration from the prolong exposure to ultra violet light of sun light. At the same time, it also posses extra flexibility to avoid cracking and feeling due to extreme cold and extreme hot temperature. Where PU coating is harder and less flexible to the expansion and retraction of wood due to the change of the temperature; exterior water based is much more flexible to expand and retract along with the wood. With a better flexibility, water based will not cracks and peel off as fast as PU. As a results, it is also able to protect wood from heat, heavy rain and humid weather longer.

thi công sơn gỗ hệ nước biochem
Biochem water-based wood paint meets the safest health standards.

All Biochem water-based paint products meet the best safety standards. In addition, compared with solvent-based paints, the quality also has outstanding advantages. In this article, Biochem will share with you the outstanding advantages of water-based coatings compared to solvent-based coatings.

The difference between water-based wood paint and traditional solvent paint

Chemically, curing takes place by two mechanisms. The paint film changes from liquid to solid due to the evaporation of the solvent (thinner) in the paint and the reaction between the polymer and the hardener (hardener). Therefore, it can be seen that in single-component coatings, the formation of the paint film is due to the evaporation of the solvent. Some one-component paints can be mentioned as water-based epoxy paints, water-based PU paints, acrylic-based paints, or even single-component solvent paints.

thi công sơn gỗ hệ nước biochem
Compare the difference between solvent paint and water based.

In addition, two-component solvent-based coatings often have a film-forming mechanism that is solvent evaporation and polymer-hardener reaction. The most common two-component paints are PU and Epoxy. It is because of this fundamental difference that the construction methods of these two are different, and the advantages of water-based paints are over solvent paints.

In the application method, the one-component coating is already prepared, in the process of use, there is no need to mix, however, two-component coating is recommended to be mixed and used in a certain ratio. , and they can hardly be preserved after the period of use and mixing.

Advantages of water-based wood paint.

Safety and protecting the health of workers and consumers

In solvent paint formulations, the dry solids content is about 25%, and most of the remainder will be these organic solvents. Common organic solvents are toluene, xylene and trimethylbenzene. 

These organic compounds are usually very volatile, and at room temperature and pressure they can easily change from a liquid to a gaseous state – the common name for these compounds is VOC. Volatile organic compounds are toxic organic compounds, and inhalation of them frequently in closed, small and poorly ventilated work environments can cause serious long-term health effects, especially especially carpenters and factory workers who directly manufacture these products.

thi công sơn gỗ hệ nước biochem
Biochem water-based paints are safer and less odorous than solvent-based paints

In fact, around the world, there are mandatory standards for the maximum amount of VOCs allowed in a paint formulation.

Whereas, water based paints are usually one component and use water as a solvent. The process of transformation and formation from the paint film is mainly due to the evaporation of water. Particularly with Biochem paint products, the amount of volatile organic compounds VOCs is 95% lower than that of traditional solvent paints. Therefore, Biochem water-based paints will be safer and less odorous than solvent-based paints.

Convenience and performance in the application of water-based wood coatings.

The convenience and ease of use of Biochem water-based wood paint is undeniable. It is a water-based one-component paint that is easy to prepare, install and clean (with water). The application process, without mixing, is similar to the conventional PU coating process. Biochem waterborne wood coatings also offer complete solutions for most wood applications, with products ranging from surface coatings, wood coatings, protective coatings and spray adhesives. It can be said that every problem has a solution from the International Biochemistry Joint Stock Company (Biochem).

thi công sơn gỗ hệ nước biochem
The application process, without mixing, is similar to the conventional PU coating process.

In addition, the process is easy to use, maintain and install, which can significantly save time, materials and money. The product is consistently high quality (pre-mixed in the factory) and durable (low maintenance costs). All of these factors are great when you consider the cost and performance issues. 

thi công sơn gỗ hệ nước biochem
Water-based wood paint can be applied in places where no odor is required.

The advantage of using Biochem water-based wood paint is that it does not require as much ventilation as solvent paint (avoid odors, risk of fire and explosion). So, now with Biochem’s solvent-free, low-odor paint, small and medium-sized carpenters, customers, contractors and workers can work where odor-free is required, such as near local areas. local, construction of apartments, offices, shopping centers, restaurants, hotels.

Quality and durability factors in Biochem water-based wood paints.

Because it is easily affected by ambient temperature and air humidity, Biochem’s water-based wood paint for wood has outstanding properties that can be mentioned:

  • Quick drying: At room temperature (eg NC paint).
  • Excellent waterproof effect: it can be used for kitchen furniture, bathroom furniture and outdoor furniture.  
  • Extremely good UV resistance, especially the yellowing ability of white paint. This is the current advantage of Biochem outdoor furniture coating that other water-based paints, including ordinary water-based paints, cannot meet.
  • Health and safety of production workers and users, especially children. 
  • Different types: very easy to use, versatile and applicable to all types of equipment: spray gun, roller/roller, electrostatic system (with spray gun/disc).
thi công sơn gỗ hệ nước biochem
Saving cost and product maintenance time is one of the factors consumers should consider.

With the advantage of the solution of this Biochem water-based wood paint product, customers can rest assured that using natural wood both avoids the deterioration of the wood’s paint layer and is easy to use. Since then, there is no need to spend a lot of effort on maintenance and maintenance of wood works like using traditional solvent paints and cleaning oils for a long time.

Reference process of natural water-based wood paint.

Step 1: Spray Satin Clear W7018 5% (Indoor) or Satin IDS604 (Outdoor)

Step 2: Dry for 20-30 minutes 45-500C or dry naturally for 45-60 minutes and then sand with #320-400 sandpaper.

Step 3: Spray Satin Clear W7018 5% (Indoor) or Satin IDS 604 5% (Outdoor).

Step 4: Dry for 20 – 30 minutes at 45-50 0 C or dry naturally for 45 – 60 minutes and then sand with #400-600 sandpaper

thi công sơn gỗ hệ nước biochem
A suitable wood finish must also have good UV resistance.

Step 5: Spray a final coat of W7018 5% (for indoor goods). For outdoor goods: mixed spray W5103/ IDS 604 100% + Part B (3%)/ Part C (6%) + Reducer (~10%) W8044.

Pack after 12 – 24 hours (for indoor goods) / 24 – 48 hours (for outdoor goods).

Total coats = 2 – 3 coats.

Total finishing time (including spraying time) = 3 – 4 hours

Spraying device with high compression gun (no vapor) with air pressure 5kg/cm2.

The product is researched, produced and distributed by the Biochem International Joint Stock Company (Biochem). For more information, please contact hotline: (+84-28) 3620 4207 / 3620 4208 or Email: contacts@biochem.vn

Leave a Reply

Your email address will not be published. Required fields are marked *