Selection of the right soil for the surface - a guarantee of satisfaction

The most important aspects to remember are: 

1. Selecting the right primer for the surface layer - we strongly advise against using cheap acrylic primers under high-quality flooring resins or two-component anti-corrosion paints. The use of such a primer will not ensure adequate adhesion to the substrate.
2. Selecting the right primer for the substrate – it is always worth remembering to use appropriate primers for a given substrate. For example, in anti-corrosion systems, a different primer should be used for black steel (it must contain anti-corrosion pigments) and another for stainless steel, where the most difficult element is the adhesion of the primer to the substrate.
3. A completely different, but very broad topic is concrete substrates . You can find, among others, concrete floors:

• requiring reinforcement (compressive strength below 25 MPa and peel strength below 1.5 MPa),
• humid (humidity above 4%),
• without or damaged waterproofing on the ground side,
• surface-hardened.

The next division of land may be its type. There are 3 different families of foundations:

• solvent-based primers - they are characterized by quite low viscosity, these primers can penetrate deep into the structure of the concrete substrate, strengthening it,
• water-based primers - most often these are traditional acrylic primers for priming walls before painting, but this group also includes modern products such as water-soluble, two-component epoxy primers for concrete or metal,
• solvent-free primers - they are characterized by higher viscosity, have very good strength properties and can be used to perform the so-called epoxy screeds, i.e. for leveling the substrate after mixing with mineral aggregate.

How long should it take to paint on the ground?

Another interesting feature of priming products is the time after which it is possible to paint the topcoats. In the case of acrylic primers , which are most often used for priming walls inside houses and apartments, this time is the same for most products and is 1-2 hours depending on the temperature and humidity.

The situation is completely different in the case of anti-corrosion primers and concrete floors . In both the first and second cases, epoxy resins dominate, and their repainting time is usually 24 hours . There are also quick-drying primers, both for anti-corrosion painting and flooring systems.

Building land – which one to choose?

Below are some examples of problems and their solutions using an appropriate primer:

Problem: 

A dozen-year-old terrace, built on the ground. After rain, damp spots are visible on the concrete surface despite the terrace being covered, the owner depends on a resin terrace finishing system.

Solution:

There is probably a problem with capillary rising of moisture. This problem intensifies after rainfall, when the groundwater level rises. , Neopox Primer AY should be used , it is a solvent-free epoxy primer resistant to negative water pressure. The product cuts off groundwater - while protecting the surface layers of resins from detaching from the substrate.

Problem: 

A new resin floor must be installed in the production hall, but unfortunately the production process requires very frequent washing. By constantly washing the floors, the concrete humidity cannot be brought to the required level of 4%. At the same time, the production plant has only 10 days of downtime for floor renovation.  

Solution: 

Due to the impossibility of bringing the floor humidity to 4%, Neopox Primer WS . It is a solvent-free primer for damp substrates that accepts substrate humidity below 100% - in other words, remove standing water/puddles from the floor and proceed with application.

Problem: 

New communication routes should be marked in the production hall. The floor is made of surface-hardened concrete. For health and safety reasons, it is not possible to grind/shot blast concrete in the hall to increase the adhesion of surface resins.  

Solution: 

Two steps can be taken to ensure adhesion of the surface layers. One of them is time-consuming and expensive shot-blasting of concrete to get rid of the layer that has been hardened. In the case in question this is impossible to do. The second way to ensure adhesion is to use a specialized epoxy primer for non-absorbent substrates, SuperBinder RO3333 . It is a two-component primer intended for non-absorbent substrates, such as epoxy resins, surface-hardened concrete or tiles. After applying the primer (and waiting the required time), you can start applying the topcoats.

Problem: 

When examining a flat, leaking felt roof, it turns out that some of the chimneys and roofs were smeared with bituminous paste.

Solution: 

Bituminous paste is quite a difficult material to cover with other materials due to the high content of oil-based ingredients. In such a case, before applying the roofing membranes, the surface should be primed with a dedicated epoxy primer, Neopox Primer BM , which ensures excellent adhesion of liquid roofing membranes (e.g. Neoproof Polyurea ) to bitumen-based insulation.

As you can see, choosing the right underlay for the situation is very important. This reduces the risk of failure during work, and therefore saves money and guarantees investor satisfaction. Check out our land offer. If you have any questions, we will be happy to answer them!

+48 717 026 345  biuro@trokentech.pl