What primers are not suitable for application under fiberboard

The abbreviation of fiberboard is translated as a fiberboard, the second name of the material is hardboard. Plates are made of softened wood pulp, which is pressed into sheets under pressure, the resulting workpieces are cut to size. Fiberboard has an inner and outer side. The back side is uneven rough, the front face is dense and smooth.

Plates are used for:

• Interior decoration in homes;
• Production of cabinet furniture;
• Draft flooring;
• Making base for art painting.

Varieties of primer

Before painting the fiberboard, it is primed. On the processed sheet paint is better laid and its consumption is reduced. Since the wood board has different surfaces for the front and back, different compositions are selected.

Primers are:

1. The alkyd primer forms a protective layer in the form of a matte film on the surface of the plate, on which the paint lays well. The solution increases the life of the material, does not contain toxic substances. It dries 24 hours at a temperature of +20 C. The solution is used to treat the front and inside of the sheet.
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2. Drying oil is a natural remedy, penetrates deep into the material, forms a dense glossy layer. The treated plane interacts well with oil paint. Drying oil protects the material from moisture. Disadvantages of drying oil - it dries for a long time, has a specific smell, the room must be well ventilated during operation. Used for processing fiberboard from two sides.
3. Flavourless water-based acrylic primer, as it does not contain toxic elements. Easily applied to the surface with a roller, dries for three hours at room temperature. However, the tool has an important drawback, the material strongly absorbs the water base. Apply an acrylic solution to the front of the plate.
4. Latex based acrylic primer. The composition of the product includes fungicides and insecticides, substances that prevent the formation of fungus. Flavourless acrylic latex primer, apply it on the sheet in one layer. The tool is used for priming on both sides of the panel.

What means do not go well with hardboard

Of the tools that are used for processing wood fiber boards, acrylic primers have the worst performance. Because it is made on a water basis, and water is the main enemy of hardboard.

The front side of the plate is smooth, since the composition of the coating includes paraffin and rosin. Additives repel water, prevent it from soaking the material. To prime the products I use an acrylic primer of deep penetration.

The back surface of the sheet is porous and unlike the front, therefore, it absorbs moisture greatly. To paint a fiberboard without gaps, it needs to be primed several times, this leads to cost overruns. Also, the processed sheets must be dried under a press so that the wet sheet does not lose shape.

The best indicators are to prepare the surface for staining with drying oil. The tool provides good adhesion to the surface with paint, protects the material from moisture. It is easy to apply on a plane, the price of the product is not high.

How to prime hardboard with linseed oil

The fiberboard structure is porous and absorbs a large amount of paint, so before painting, you need to prime the surface:

1. Before priming the hardboard and fiberboard, the drying oil is heated to +40 C - 50 C, the PF brand is used for work. It is not recommended at home to use a product that includes petroleum resin, as well as compositions with a rosin suspension. Such drying oil is toxic and dries for a long time.
2. The surface of the plate is cleaned of debris. The cracks in the joints of the sheets are sealed with tape or reinforced tape. The entire area is degreased with alcohol or a solvent (white spirit or acetone-based). Care must be taken to the ends of the sheet, these places are often forgotten to work out.
3. Fiberboard is primed in 2-3 layers in order to better impregnate the material.
4. Apply a primer every subsequent time after complete drying.
5. Choose the soil for fiberboard, taking into account which part of the sheet will be processed. Also consider what kind of paint the surface will be painted. The best recommended is drying oil, acrylic, water-based, most unsuitable for working with fiberboard.