Paint terminology: Efflorescence - Explained

Understanding Efflorescence in paint.

Have you ever noticed white, powdery stains appearing on your freshly painted walls? If so, you’ve encountered efflorescence. This common paint issue can be a nuisance, but understanding how it works can help DIY enthusiasts and professionals alike achieve a flawless finish.

Let’s dive into what  efflorescence is, its causes, and how to prevent and address it.

What is Efflorescence?

Efflorescence appears as a white, powdery residue on painted surfaces, especially on masonry, concrete, or brick. It’s caused by soluble salts migrating to the surface when moisture passes through a material. As the moisture evaporates, the salts are left behind.

Causes of Efflorescence

Efflorescence is primarily caused by:
Moisture: Rain, leaks, or humidity can introduce water into masonry, which then dissolves salts that migrate to the surface.
Porous Surfaces: Masonry materials like brick and concrete readily absorb water, increasing the risk of efflorescence.
Application Conditions: Painting over damp surfaces can trap moisture, promoting efflorescence.

Prevention tips

Surface Preparation: Ensure that surfaces are dry and clean before painting.
Quality Primers: Use an alkali-resistant primer like  Prominent Alkyd-Based Primer to block salt migration.
Waterproofing: Apply a good waterproofing product to prevent water ingress.
Proper Drainage: Ensure that gutters and downspouts are functioning properly.
Select the Right Paint: Choose a high-quality product like Prominent Select Sheen or Neuklad Range, designed for breathability and durability.

How to treat efflorescence

1. Identify the moisture source: Find and fix any leaks or drainage issues.
2. Clean the Surface: Use a stiff brush or a mild acid solution like diluted vinegar to remove salt deposits. Rinse well and allow the surface to dry.
3. Repaint: If needed, repaint using a quality primer to prevent further efflorescence.

Choosing the right products

Prominent Paints offers solutions tailored to protect your surfaces from issues like efflorescence. The Neuklad Range not only refreshes your walls but also offers protection against the elements. Using Prominent Select Sheen for high-traffic areas can also help keep moisture at bay.

Efflorescence can be frustrating, but by understanding its causes and taking proper preventive steps, you can maintain a beautiful finish that lasts.

Happy painting!