What is the difference between damp-proof and mould-proof paint?

When choosing a paint to protect walls from damp, it is important to know the difference between damp-proofing paint and mildew-proofing paint. Although often confused, they have different properties and uses that directly affect the durability and finish of surfaces. Applying the wrong type of paint can not only worsen the problem but also lead to additional repair costs. In this article we explain their differences, benefits and when to use each.

Damp-proof paint: Protection against leaks and condensation

Damp-proof paint is designed to prevent and treat moisture problems in walls and ceilings. Its main function is to block water absorption and prevent moisture from penetrating the surface. Its use is essential in spaces where dampness is recurrent, as it acts as a barrier that prevents water from causing damage to the paintwork or wall structure.

Main characteristics of damp-proof paint

• Forms a waterproof barrier that prevents water absorption.
• It is ideal for areas with condensation such as bathrooms, kitchens and basements.
• Helps prevent the appearance of damp stains and the deterioration of conventional paint.
• Some formulations include breathable agents that allow water to evaporate without compromising the paint.
• Can be used both indoors and outdoors, depending on the type of formulation.

When to use damp-proof paint

It is recommended in spaces where there are problems of capillarity, filtration or condensation. If walls have persistent damp stains or are flaking, applying damp-proof paint can be the solution to protect and improve their appearance. In addition, in cases where leaks come from the outside, it is advisable to identify the cause and solve it before applying the paint, to avoid recurring problems.

Anti-mould paint: Mould prevention and removal

Anti-mould paint is specifically formulated to prevent the growth of mould on surfaces exposed to moisture. It contains biocides and antifungal additives that prevent the growth of fungi and bacteria on walls and ceilings. The proliferation of mould on walls not only affects the aesthetics of the home, but can also be harmful to health, especially for people with allergies or respiratory problems.

Main characteristics of anti-mould paint

• Prevents the proliferation of mould and fungus in damp areas.
• It is ideal for enclosed spaces with poor ventilation.
• Can be applied over damp-proof paint for complete protection.
• Available in water-based and solvent-based versions, depending on surface requirements.
• Some formulations include protection against bacteria, making it ideal for hospitals and healthcare areas.

When to use anti-mould paint

If walls have black or greenish stains, bad odour or obvious signs of mould, it is advisable to use an anti-mould paint to eradicate the problem and prevent its reappearance. This is an excellent option for bathrooms, kitchens and poorly ventilated rooms, where dampness and lack of air circulation facilitate the proliferation of fungi. In some cases, it is advisable to use dehumidifiers to reduce the humidity in the room and improve the effectiveness of the paint.

Key differences between damp-proof paint and anti-mould paint

Can both paints be combined?

Yes, in many cases it is advisable to first apply a damp-proof paint to block water absorption and, once dry, use anti-mould paint to prevent the proliferation of fungus. This provides complete protection against moisture and its side effects. This combination is especially useful in humid climates or in areas where ventilation is insufficient.

In Bartolomé Bas Pinturas we offer you specialised advice and high quality products to solve any humidity problem in your walls. Contact us and discover the best solution for your home.