Weather resistance and durability become higher in the order of acrylic, urethane, silicone, and fluorine. The expected lifespan is generally said to be 5-8 years for acrylic, 8-10 years for urethane, 10-15 years for silicone, and 15-20 years for fluorine.

In general, the two-pack product is a reactive curing type, so it can be applied to a wide range of substrates. It can be said that the two-pack type is superior to the one-pack type in terms of penetration and adhesion to the substrate.

There is almost no difference in the expected lifespan due to the difference in gloss/sheen.

We have 5 types depending on the product: gloss (high-gloss), 70% gloss, 50% gloss (semi-gloss), 30% gloss (satin) and matt. Even if the gloss level is same, the degree of gloss differs slightly depending on the product.

In the test assuming an actual detached house, a temperature reduction effect of approximately 3°C to 5°C has been confirmed. However, the heat reflection effect varies depending on the structure of the building, the usage and the type of insulation material, the ventilation, the area of the opening, the location, and the coating specification. Therefore, the effect of reducing the indoor temperature cannot be guaranteed.

The darker the colour (the lower the brightness), the higher the surface temperature. This is the same for regular paints. When the same colour is applied, the surface temperature difference between regular paint and heat reflective coating increases as the colour changes from light to dark. In other words, the difference in solar reflectance is larger for darker colours and smaller for lighter colours.

Sealer has the meaning of "adhering, covering". It is an undercoating material that is mainly applied to absorbent substrates such as mortar and concrete. It acts like an adhesive to enhance adhesion to the substrate. On the other hand, filler has the meaning of "filling, stuffing, filler". It is mainly used to repair cracks and fill uneven surface to make it smooth.

There is an appropriate consumption to apply, so please apply accordingly. Even a thick coat of paint does not guarantee long-lasting performance. On the contrary, it may cause poor finish such as paint drips, pinholes, etc.

If the paint film is breathable and moisture permeable, water vapour will not accumulate inside the paint film, preventing the occurrence of blisters, which are defects in the paint film.

Compared to solvent-based paints, water-based paints have less odour, so they can be said to be environmentally friendly. However, since it cannot be used at low temperatures of 5℃ or lower, solvent-based paints are more suitable for low temperatures such as in cold region. There is no big difference in performance.

The paint film thickness is as follows.

Spray tiles, lithin: about 0.5-3 mm
Stucco: about 1-5 mm
Regular paints (emulsion and anti-rust coatings): about 30μ (0.03 mm)

Generally, water-based paint forms a paint film by fusing the resin during the drying process, so there is no problem if it forms a film.

There is no particular problem because an undercoat (sealer) is applied when water-based paint is used over solvent-based paint.
When solvent-based paint is used over water-based paint, the solvent may damage the old paint film and cause abnormalities such as blisters and shrinkage. Check the condition by test application prior to the actual application.