Best Anti-Mould Paint for Bathroom: Top-rated Anti Mould & Mildew Paint for Walls and Ceiling

Fungicides are the backbone of mould and mildew-proof paint. These chemical compounds actively disrupt the lifecycle of mould spores, preventing them from colonizing surfaces. Common fungicides include:

Zinc Pyrithione: A broad-spectrum antimicrobial agent that stops mould, mildew, and algae growth. It’s widely used in paints for its durability and low toxicity.

Silver Ion Technology: Silver ions embedded in the paint film destroy bacterial and fungal cell membranes, offering long-lasting protection.

Quaternary Ammonium Compounds (Quats): These positively charged ions penetrate mould spores, destabilizing their structure and preventing reproduction.

These fungicides are often labeled as "anti-mould additives" and are either mixed into the paint during manufacturing or sold as standalone concentrates to boost existing paints.

Many mould and mildew-resistant paints include antimicrobial agents that target bacteria and fungi. These additives create an inhospitable surface for microorganisms:

Mildewcides: Specifically formulated to combat mildew (a type of mould), these chemicals are common in bathroom paints.

EPA-Registered Antimicrobials: In premium paints, you’ll find EPA-approved ingredients like Polyphase® or Microban®, which provide continuous protection against mould, bacteria, and odors.

Mould thrives in damp conditions, so mould-resistant paint for bathroom walls and ceilings must repel water. Key materials include:

Acrylic or Latex Resins: These binders form a flexible, non-porous film that resists water absorption. High-quality acrylic paints are less likely to crack, reducing crevices where moisture can seep in.

Epoxy or Alkyd Formulas: Often used in clear anti-mould paint for tiles or grout, these create a waterproof barrier that locks out humidity.

Mould struggles to grow in alkaline environments. Many mould-proof paints include additives like: Sodium Borate (Borax): Raises the paint’s pH, making surfaces less inviting for spores. Lime or Portland Cement: Found in mineral-based paints, these naturally alkaline materials inhibit mould growth while allowing walls to "breathe." 5. Water-Repellent Additives To further combat moisture—the root cause of mould—paints incorporate hydrophobic (water-repelling) materials: Silicone Additives: Form a water-repellent layer on the paint surface, causing water to bead up and roll off. Teflon® or PTFE: Used in some premium paints, these fluoropolymers create a slick surface that resists water and stains.

To further combat moisture—the root cause of mould—paints incorporate hydrophobic (water-repelling) materials:

Silicone Additives: Form a water-repellent layer on the paint surface, causing water to bead up and roll off.

Teflon® or PTFE: Used in some premium paints, these fluoropolymers create a slick surface that resists water and stains.

Some mould-resistant paints use mineral fillers to improve durability and breathability:

Microscopic Silica or Clay Particles: Fill tiny gaps in the paint film, reducing porosity and preventing moisture retention.

Titanium Dioxide: A UV-resistant pigment that also has mild antimicrobial properties.

For eco-conscious buyers, certain paints use plant-based or mineral ingredients:

Tea Tree Oil: A natural fungicide that deters mould growth (common in low-VOC paints).

Citrus Seed Extract: Contains compounds like limonene, which have antimicrobial effects.

Copper Particles: Copper is naturally toxic to mould and bacteria, though rarely used due to cost.