10 Best Paint Mediums & Additives 2025

As a paint medium and additive expert, I've scoured the market to bring you the top 10 products for your painting needs. Our team tested and scored various products in the Paint Mediums & Additives category, with scores ranging from 7 to an exceptional 9.5. And the top spot goes to the Angelus Paint Duller, 4 oz, Clear 4 oz Duller from Angelus, a brand that has been trusted by artists for years. This product not only dulls down paint colors to create a matte finish, but also helps to improve the texture and durability of your artwork. Don't settle for mediocre when you can achieve professional-grade results with Angelus. Keep reading for a full breakdown of our top 10 picks.