PU is a kind of polymer which is used in many applications in life. PU paint has two main forms of hard and foam, which are used for varnish and protect furniture such as furniture, wooden doors. PU paint also makes the wood surface more beautiful, polishing and shining.
Today, we will study what a Polyurethane painting is and how many coats of polyurethane on a table.
Firstly, Polyurethane is a kind of polymer which has two main forms of hardness and foam. PU is used for protection of furniture such as wooden and table. In the simple language of the painters, PU paint is a type of paint which help protect, polish and color the natural and industrial wood.
How many coats of polyurethane on a table?
The composition of the paint also has only three main components:
The first coat is the Primer: This coat is to smooth the surface, hide the defects. It’s the same as the wall painting that we use the dough to smooth the surface when painting. The color paint depends on the users’ requirements; most PU paints for wood have color paint elements.
The final one is the polishing coat: many users use PU to create the glossy surface for wood products.
How many coats of polyurethane should be put on hardwood floors? Is one coat of polyurethane enough?
Normally, the property of the floor surface also affects to the finish paint quality. For hardwood floors, there are more coasts of PU than normal ones. These coats are the first primer coating, the first color coat, the second color coat, and PU Topcoat. In the next part, you and I will learn how to make the paint compound before applying.
>>> Read more: Danish oil and Tung oil – What Are The Differences?
How to make the paint compound? (follow the following technical guidance)
The basic steps to make a standard PU paint include:
– Step 1: Firstly you need to mix the primer with the ratio: 20% of primer and 50% of petrol, then use the stirring tool to mix this compound up.
– Step 2: Then you mix paint color in the ratio of 20% of primer, 10% of hardware and 50% of petrol with the concentration used for each type of color paint. The color element is a very small part that can meet your requirements. Finally, you can use a tool to mix and stir evenly.
Base on the furniture you apply polyurethane painting that how many coats of polyurethane do you put on cabinets? How many coats of polyurethane on a kitchen table? The answer is you should apply at least 4 PU coats for cabinets and 3 PU coats for a kitchen table.
How many steps in applying coats of PU paintings? Read the following instructions
If you prepare time, your work shall be more attractive and simple. Choosing the right color panel and a proper mixing ratio will save you a lot of time and cost.
Step 1: Do surface preparation by rubbing to create adhesiveness.
Step 2: Adjust the color of the wood before painting to get even and smooth color.
Step 3: Coat 2 times so that the paint is suitable and flat. After the first lining, we should correct the surface of the first lining and then apply the second coat. This time of coating shall have new and beautiful colors.
Step 4: Paint the PU color 1 to make natural colors for wood furniture.
Step 5: Improve the paint color from the first time by fixing the remaining shortcomings to ensure the paint color is smooth.
Step 6: Paint the second time to get the beautiful color to create adhesion and overcome the condition of peeling and deterioration over time.
Step 7: Spray top coat to prevent dirt and external effects on the product and floor surface.
Are there any tips to make the surface of PU painting shining or how to apply polyurethane without bubbles?
At first, we should explore the reasons resulting into bubbles in polyurethane painting surface:
☑ The solution evaporates too quickly
☑ The Environment at the place of drying is too hot
☑ The paint material is foamed after strong stirring
☑ Wood may not have been properly dried or may have been excessively moistened
☑ There are so many timbers on the painting surface.
How to apply polyurethane without bubbles?
☑ Use the appropriate solution for the paint and the weather.
☑ At drying areas, newly applied products at a temperature of 28 – 34 ° C should use a drying fan.
☑ When taken to a paint sprayer or paint mixer, set the stirring speed to sufficiently mix the paint.
☑ Wood must be dipped in moisture and checked for moisture content of 8- 16% before painting.
☑ Use 2 passes of paintings, and each pass must be at least 60 seconds apart.
And, a very important question that many people are wondering is how long I should wait between coats of polyurethane?
To have a good process of painting PU furniture, you should follow the above steps and use the material by the proper ratio. Drying time should be at least 25-30 minutes between coats of polyurethane. For plywood gluing, read more here for the time of drying.
How to choose the best brush for polyurethane?
Unlike the painting technique, choosing the best brush for polyurethane could be uncomplicated. However, if you never put a brush to bare wood before, it’s better to learn how to choose a proper one.
A brush acts as a transferor to transport the PU from the can to the project. A right brush has a significant impact on smoothing the coat. That is when the brush becomes essential in this process. I will provide tips to pick the most appropriate brush for your work.
Foam brush is an inexpensive option on the budget point. It works best for small projects. But it has a blade which does not come well with polyurethane.
The blunt sides leave two lines of creases when you’re done with the coat. It also contains air at the head which may cause bubbles in your finish.
Besides, foams are easy to wear off and become floppy by time. Hence, it’s not the best option
Natural bristle brush
Oil-based polyurethane finishes take time to dry. It is vulnerable to hard brush and contains mineral spirits.
In this case, a natural bristle brush is able to load more liquid to help you finish faster to avoid bugs and dust. Moreover, fine-bristle brushes are easy to clean and can reuse infinitely.
Synthetic bristle brush
Natural bristle will swell when it meets water, causing it to lose the shape. A synthetic bristle brush, on the other hand, doesn’t absorb water. So, they can remain the initial form leaves better strokes. This type of brush is ideal for water-based polyurethane that gets dried more quickly.
In the end, it depends on your budget, but you should try to avoid inexpensive bristle brushes as they tend to leave ridges. Foam brushes are cheap and work well on flat surfaces. Bristle brushes are effective on molded edges and fine details.
The preservation and packaging are quite important. After painting you have to dry product to avoid dust and paint dust clinging to a great impact on the appearance of the finished product. For those who wonder how many coats of polyurethane on a table, hope that the above article can help them well implement in the actual condition.