Protect painted surfaces from mold and mildew while improving application and durability with reliable paint additives. This guide highlights top mildewcide and odor-control additives you can mix into water-based or oil-based paints, plus practical considerations for choosing the right product for your project. Below, find five well-rated options and a concise buying guide to help you compare features, compatibility, and usage.
| Product | Brand | Key Benefit |
|---|---|---|
| Paint-Guard Mold and Mildew Defense Paint Additive (1 Gallon Treatment) | BTG PRODUCTS | Defends painted surfaces from mold and mildew growth; easy to use |
| MICROBAN 1.5 oz. Fungicidal Paint Additive | MICROBAN | Resists mold and mildew on dry paint; treats 1 gallon |
| MICROBAN 1.5 oz. Fungicidal Paint Additive – Pack of 2 | MICROBAN | Two-pack option; same mildew resistance per gallon |
| Homax Anti-Skid Paint Additive, 16 oz | Homax | Adds skid resistance; suitable for varied substrates |
| Rust-Oleum Anti-Skid Additive, 3.4 oz | Rust-Oleum | Aluminum oxide-based; compatible with multiple paint types |
Note: Each product section below provides a concise overview of features, application notes, and how it contributes to mold, mildew, or surface protection during the coating process.
Paint-Guard Mold and Mildew Defense Additive
BTG PRODUCTS’ Paint-Guard Mold and Mildew Defense is designed to defend painted surfaces from mold and mildew growth. It’s marketed as easy to use—simply pour into water-based paint—and aims for long-lasting protection to prevent surface degradation. Suitable for DIY or professional applications, this additive integrates with standard water-based coatings to help maintain aesthetic and structural integrity over time.
Rust-Oleum Anti-Skid Additive
Rust-Oleum’s anti-skid additive uses an aluminum oxide-based formula that can be mixed into epoxy, latex, or oil-based paints or stains. It’s designed to improve traction on concrete, wood, metal, or fiberglass coatings. A single 3.4 oz package treats up to one gallon of coating, offering a straightforward way to enhance safety and durability for floors, ramps, and walkways.
Sunnyside M-1 Waste Paint Hardener
This waste paint hardener helps solidify excess paint into a disposable form, supporting cleaner disposal. It’s compatible with both oil-based and latex paints and accompanying colorants, aiding in proper waste management during projects that generate leftover paint. Not a mildew-specific additive, but a practical companion for comprehensive paint preparation and cleanup.
MICROBAN 1.5 oz. Fungicidal Paint Additive
Microban’s 1.5-ounce fungicidal additive is designed to resist mold and mildew on dry paint. It blends easily into both oil-based and latex coatings, treating approximately one gallon per bottle. The formula aims to prevent mildew-related deterioration, contributing to longer-lasting finishes and easier maintenance for interior and exterior surfaces.
MICROBAN 1.5 oz. Fungicidal Paint Additive (Pack of 2)
This two-pack option provides the same mildew-resistant formula per gallon as the single bottle, offering convenience for larger projects or ongoing maintenance cycles. It blends with oil-based or latex paints, aims to prevent mold and mildew growth, and helps protect the coating’s integrity over time without altering color or finish.
Homax Anti-Skid Paint Additive, 16 oz
Homax offers a 16-ounce anti-skid additive designed to improve traction. While not a mildew-specific product, it complements coatings in high-traffic areas where moisture and wear could otherwise lead to deterioration. It can be mixed with a range of paints to provide a safer, slip-resistant surface on floors, stairs, and ramps.
ZORBX 3 Oz Concentrate Surface Odor Remover Paint Additive
ZORBX’s odor-removing concentrate is designed to tackle odors from smoke, mildew, cooking, pets, and other sources. Mix 1.5 oz per gallon of latex or primer, not exceeding 3 oz per gallon to avoid thinning. This additive focuses on odor control during repainting projects, helping fresh coats smell clean and feel fresh in living spaces.
Buying Guide: Key Purchase Considerations
What to consider when choosing a mildewcide or odor-control paint additive:
- Target protection: Look for mildew and mold resistance if you’re addressing damp environments, such as bathrooms, basements, or kitchens.
- Paint compatibility: Confirm whether the additive works with oil-based, latex, or both types of paints, and whether it alters color or finish.
- Application method: Some additives require simple mixing into the paint at ratio guidelines; others may have specific mixing or cleanup requirements.
- Coverage: Check how much one unit treats (per gallon) to estimate quantities for your project scope.
- Odor control: If odor is a concern, select additives designed to neutralize smells without compromising performance or drying time.
- Safety and disposal: Review product safety data and disposal guidelines, especially for mold-active or solvent-based formulations.
- Environmental conditions: In high-humidity or poorly ventilated spaces, prioritize products with stronger mildew protection and longer-lasting performance.
- Regulatory and use: Confirm suitability for indoor/outdoor use and any surface-specific limitations (wood, concrete, metal, drywall).
In choosing between single bottles and multipacks, align quantities with the scope of your project and future maintenance plans. For odor and mold concerns, Microban’s additives are commonly cited for durable mildew resistance, while anti-skid options improve safety in moisture-prone areas. Always follow label directions and perform a small test area before full-scale application to ensure compatibility and desired results.