Paint forms a protective film over your walls, protecting the bare substrate from dirt, dust, and contamination. It also serves an aesthetic purpose, as paint gives your walls texture and color. Additionally, it can protect your walls from water infiltration if you use waterproof paint.
Waterproof paint has an enhanced resistance to moisture and humidity. Unlike regular non-waterproof wall paint, waterproof paint contains additives that transform it into an effective barrier between water and the substrate. This means it works to prevent moisture from seeping to and through, which can lead to discoloration, the growth of mold and, eventually, structural damage.
Waterproof paint is ideal for use on exterior walls which are exposed to rain, and in perennially damp and high-humidity areas like the bathroom, basement, and kitchen.
How do you use waterproofing paint? Read on to learn how to apply waterproof paint, including tips that can help significantly enhance its efficacy.
Remember the following when applying waterproof paint.
Waterproof paint can provide a moisture-repelling barrier only if the surface is structurally intact. If the wall has cracks through which water can pass, painting and waterproofing it will be ineffective against moisture intrusion.
Even if there are no cracks, check if the surface has existing dampness issues. For instance, a leaking water pipe or poor drainage will keep it damp, and using waterproof paint, in this case, will be nothing but a stop-gap measure.
If you want waterproof paint to do its job and provide long-lasting moisture and humidity protection, make sure to use it only on structurally intact surfaces without any persistent, underlying dampness issues.
To this end, make sure to do the following before you apply waterproof paint:
Waterproof paint must adhere to the substrate to work. The better its adhesion to the surface, the longer it can last and the more protection it offers.
An even surface is best for superior paint adhesion. Inspect the surface and check it for cracks, holes, and other imperfections. You’re looking for things like nail holes and dents.
For every cavity you find, use a cloth or brush to scrape away any loose dust and debris. You may have to widen cracks before you can successfully clear them of lingering particles.
After cleaning the holes and cracks, fill them with a spackling compound using a putty knife or your finger. Make sure to use spackle suitable to your substrate; i.e., use spackling putty made for concrete if you’re filling in concrete walls. Let the spackling compound dry.
