Best Paint Mediums & Additives AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (line): Liquitex Professional Matte Medium
It is a versatile acrylic medium that extends paint, makes glazes, cuts sheen and doubles as a collage adhesive.
Not for: Oil or watercolor painters, and acrylic painters who want a glossy, deep finish.
AI picks by need
For faster-drying oil glazes
Gamblin Galkyd (line)
It is an alkyd painting medium that speeds drying and gives smooth, glossy glazes in oil.
Not for: Painters who want long blending time or who work only with water-based paint.
For longer acrylic working time
Golden Acrylic Glazing Liquid (line)
It extends open time and thins acrylic into transparent glazes without weakening the paint film.
Not for: Fast impasto work, or painters who want a matte finish.
For watercolor
Winsor & Newton Gum Arabic (line)
It increases gloss, transparency and color brilliance in watercolor and gouache.
Not for: Heavy users, who can lose rewetability and get cracking from overuse.
What the AI looks for in Paint Mediums & Additives
- Paint type match
- Use acrylic polymer mediums with acrylic, oil or alkyd mediums with oil, and gum or ox gall with watercolor; never cross them. Incompatible mediums cause adhesion failure and cracking.
- Fat over lean
- In oils, each layer should contain equal or more oil or medium than the one beneath. Lean layers over fat ones crack as the paint cures.
- Dilution limits
- Thin acrylic with medium, not large amounts of water, for glazes. Too much water weakens the binder and can cause lifting.
- Sheen control
- Match gloss, satin or matte medium to the final look, and avoid thick matte layers over darks. Matting agents can cloud deep colors.
Brands that matter
- Golden: The broadest range of acrylic gels, mediums and pastes.
- Liquitex: Professional mediums, gels and pouring medium.
- Gamblin: Galkyd, Neo Megilp and Solvent-Free Gel for oils.
- Winsor & Newton: Liquin alkyd mediums and watercolor gum arabic.
What to avoid
- Mixing linseed oil or solvents into acrylic paint
- Using house paint additives in work meant to last
- Overloading oil paint with resin mediums
Questions
Medium or gel?
They use the same polymer; gels are thicker for texture and impasto, mediums are fluid for glazing and extending.