What Does Primer Mean In Construction?
What Does Primer Mean In Construction?
A primer is a type of paint product that is used as a preparation for the final coat of paint. It is applied to various materials before painting to ensure that the final paint will adhere well to the surface, increasing its durability and protection.
Primers are typically made up of a mixture of synthetic resin, solvent and other additives, with some primers containing polyethylene for improved durability.
Primers are designed to form a binding layer that will improve the adherence of the final paint. They are not intended to be the final, durable finish, but are engineered to have better filling and binding properties with the underlying material.
This can be achieved through chemistry, as with the aluminum primer, or through the physical properties of the primer, such as its porosity, tackiness, and hygroscopicity .
In practical use, primers are commonly applied to porous materials such as concrete and wood, especially when they will be exposed to the elements and are not water-resistant.
The use of primer is also standard when painting gypsum board (drywall) in new construction to seal the wall from moisture and prevent mold growth. Primers can also be used on dirty surfaces that cannot be cleaned or when painting light colors over a dark finish.
Some primers can be tinted to better match the color of the final paint, reducing the number of layers necessary for uniform coverage.
Primers are also used to hide joints and seams for a more finished look. Some primers require that the topcoat be applied within a certain time frame after the primer has dried typically from 24 hours to two weeks, to ensure optimal adhesion. The time frame will depend on the specific situation and the level of exposure such as indoors or outdoors.
In general, it is common to apply the final coat of paint before the primer has fully cured to improve the adhesion between the two coats. The specific requirements for applying the topcoat will depend on the situation and exposure level.
Overall, the use of primer is an important step in the painting process that can greatly improve the durability and appearance of the final paint.
Types Of Primers Used In Construction
In construction, there are three main types of primer: oil-based, latex, and shellac. Each type has its own unique benefits and drawbacks which will be discussed in further detail.
The oil-based primer is the most popular choice and has been utilized for many years. It is versatile in its compatibility with both oil and latex paints and is recommended for use on surfaces such as wood, steel, metals and previously painted walls.
Latex primer is a water-based, VOC-free option and is ideal for surfaces like softwood, bricks and concrete. It is a good choice for painting areas frequented by children or those with breathing problems. This primer can be used with either latex or acrylic paint.
Finally, the shellac primer is most commonly used for interior painting and provides excellent protection against stains, water damage, and smoke damage on surfaces like wood, metal, plaster and plastic. It is used in combination with either oil or latex paints.
Is Primer Necessary Before Foundation?
Primers are an essential part of any make-up routine, as they form a barrier between your skin’s natural oils and your foundation.
Primer helps to even out the surface of the skin, creating a smooth canvas for you to apply your foundation on top of. It also helps to reduce shine and blur fine lines and pores – giving you a flawless look.
Moreover, silicone primers give the face a super smooth, silky feeling that helps make-up glide over your skin without settling into pores and creases. So if you want your make up look to last longer, having a primer before applying foundation will help achieve this!
Which Surfaces Require Priming?
Most surfaces benefit from a primer coating, but some materials require it especially. These include wood, metal like steel and aluminum, concrete and plaster, ceramic tiles, and PVC.
The primer serves different purposes on each surface. For instance, it seals wood to improve paint adherence, prevents oxidation and corrosion on metal, and shields concrete and plaster from moisture and mold on outdoor surfaces.
How Long Can Primer Sit Before Applying Foundation?
Applying makeup too soon after primer can lead to patchiness and pilling, so it is important to wait for the primer to dry completely before doing so.
This usually takes about a minute or more, depending on what type of primer you are using, how much you have applied, and your environment; in humid environments products may take longer to dry. Additionally, ensure that your skin is moisturized first, as this will help the primer go on smoother and adhere better.
Once the primer has had enough time to set and absorb into your skin, then you can start applying foundation.