Funny coincidence - you probably already own one of these additives and haven’t noticed how much it can change your work. You’ll find options that mattify, level, flow, thin, or thicken paint so you can control sheen, texture, and drying. I’ll walk you through five reliable choices, compatibility observations, and simple tests to avoid mistakes - and you’ll want to try a small batch before committing to a whole piece.
Crafter’s Workshop Matte Gel Medium for Acrylic Paint
Should you work with stencils, collage, or mixed media and need a reliable, matte finish that won’t wrinkle delicate papers, the Crafter’s Workshop Matte Gel Medium (8 oz, TCW9011) is built for you-it’s a thick, non-toxic gel that seals, adheres, and creates translucent layers on paper, canvas, wood, and fabric while drying clear and invisible. You’ll use it as glue, sealer, or finish for decoupage, photo transfers, and texture stenciling. Tint it with acrylics for subtle glazing, protect watercolor or pencil without shine, and trust its gentle yet strong adhesion on vintage papers and textiles. Made in USA.
Best For: Artists and crafters who work with stencils, collage, mixed media, decoupage, or delicate papers and need a matte, non-wrinkling adhesive/sealer that dries clear.
Pros:
- Thick, non-toxic gel that provides strong adhesion and seals without adding shine or wrinkles to delicate papers.
- Versatile: functions as glue, sealer, finish, and can be tinted with acrylics for translucent glazing and texture stenciling.
- Suitable for many substrates (paper, canvas, wood, fabric) and gentle enough for vintage ephemera and photo transfers.
Cons:
- Not water resistant or waterproof, so finished pieces may require additional protection for moisture exposure.
- Thick consistency can be harder to spread for some applications and may require practice to avoid excess buildup.
- Available only in matte finish-users seeking gloss or satin finishes must look for different products.
Pouring Masters 16oz Matte Pouring Paint Medium
In case you want predictable, matte pours that photograph well, Pouring Maestros 16oz Matte Pouring Paint Medium is a smart choice-it’s formulated to improve flow and consistency for poured sheets, puddles, and lively chromatic cell effects without slowing drying time or altering color. You’ll mix it with Pouring Maestros or other acrylics to adjust viscosity for smooth, lively pours and rich cells. The clear matte finish cuts shine and glare, making images truer to the original. It won’t reduce adhesion or cause cracking, fading, or separation. Non-toxic and ASTM D4236‑conforming, it’s a reliable viscosity adjuster for fluid art techniques.
Best For: artists and hobbyists who create acrylic pour paintings and want predictable, matte-finish pours that photograph without glare.
Pros:
- Improves flow and consistency for poured sheets, puddles, and cell effects without altering color.
- Clear matte finish reduces shine and glare, making photos truer to the original.
- Non-toxic and conforms to ASTM D4236; won’t slow drying time or reduce adhesion.
Cons:
- Matte finish may not suit artists who prefer a glossy, high-shine look.
- Additional mixing step required to achieve desired viscosity for each paint brand or project.
- May be unnecessary for techniques or paints that already have ideal pouring consistency.
U.S. Art Supply Floetrol Pouring Paint Medium Kit
Should you’re looking to improve flow and eliminate brush marks in acrylic or latex projects, the U.S. Art Supply Floetrol Pouring Paint Medium Kit gives you a practical, budget-friendly solution. You get a quart of FLOOD/PPG Floetrol additive plus 12 graduated 10-ounce mixing cups, 3 spreaders (sizes 4–6), 50 wood sticks, and 4 mini stands to raise pieces. It fortifies acrylic and latex, helps latex spray like oil-based paint, and works with resins, epoxy, stains, and multiple surfaces. The matte finish is non-toxic and suited for interior or exterior use; package measures 10.39×8.5×4.96 inches.
Best For: Hobbyists, DIYers, and painters who want an affordable way to improve flow, reduce brush marks, and adapt acrylic or latex paints for pouring, spraying, or multi-surface projects.
Pros:
- Includes a full quart of FLOOD/PPG Floetrol plus useful accessories (12 graduated cups, 3 spreaders, 50 sticks, 4 stands) for immediate use.
- Improves paint flow and reduces brush marks; compatible with acrylics, latex, resins, and epoxy.
- Non-toxic, matte finish suitable for interior and exterior applications.
Cons:
- Not water resistant, so finished pieces may need additional sealer for outdoor or wet environments.
- Kit contains only one quart of Floetrol-heavy or large projects may require purchasing more.
- Intended as a flow additive rather than a standalone primer or topcoat, so additional products may be needed for full protection.
OWATROL Easy Flow Acrylic Paint Additive (34 oz)
In case you want a reliable conditioner that smooths acrylics for pouring, brushing, or spraying, OWATROL Easy Flow is a strong choice-it improves flow, eliminates brush and roller marks, and helps produce flexible, water‑resistant finishes without thinning the paint. You’ll mix this milky white, gloss additive (34 oz) with water‑based acrylics to prevent crazing, improve pour behavior, and maintain spray‑gun performance while reducing clogs and wear. It’s suitable for indoor and outdoor work, canvas pours, and general acrylic applications. With medium coverage and a 4.6‑star average from users, it delivers professional results and extends equipment life.
Best For: artists and DIYers who need a reliable acrylic paint conditioner for smoother pours, brush or spray application and improved durability on indoor or outdoor projects.
Pros:
- Enhances flow and eliminates brush/roller marks for a professional finish.
- Reduces spray-gun clogs and wear, helping maintain spray performance and extend equipment life.
- Improves flexibility and water resistance, suitable for canvas pours and general acrylic use.
Cons:
- Not fully waterproof, so may not be ideal where complete waterproofing is required.
- Adds a milky gloss element that could slightly alter paint sheen or color perception.
- Medium coverage may require testing for specific pouring ratios or thin layers.
Angelus Acrylic Paint Thickening Additive for 3D Art
In case you’re an artist who wants oil-like impasto without the solvents, Angelus 2-Thick is a smart choice: this acrylic additive thickens paint so you can build textured, sculptural layers on shoes, canvas, bags, or flexible surfaces and still keep the paint pliable. You’ll mix it into acrylics in small increments until you reach the viscosity needed for impasto, built-up texture, or clay-like finishes. It expands your sculptural options and layered effects while remaining suitable for wearable items. Note it increases thickness and texture but won’t fully replicate all oil paint properties, so test blends for best results.
Best For: artists and makers who want to achieve oil-like impasto and thick, sculptural acrylic textures on shoes, canvas, bags, and other flexible or wearable surfaces without using solvents.
Pros:
- Thickens acrylic paint to create impasto and clay-like, three-dimensional textures.
- Keeps paint flexible and suitable for wearable items like shoes and bags.
- Easy to use-mix in small increments to control viscosity and sculptural effects.
Cons:
- Does not fully replicate all properties of traditional oil paint (e.g., drying time, sheen).
- Requires testing to find the right mix and may alter paint handling unpredictably at higher ratios.
- May add cost and an extra step to painting workflows compared with straight acrylics.
Factors to Consider When Choosing Paint Mediums Additives
Upon selecting additives, you’ll want to check compatibility with your paint type so pigments and binders don’t react poorly. Consider the finish you want, how the additive changes viscosity and flow, and whether it speeds up or slows drying. Also ponder the surface you’re painting and the environmental conditions the work will face.
Compatibility With Paint Types
Although additives can seem interchangeable, you must match them to your paint’s chemistry and solvent system to avoid mixing failures, separation, or compromised curing. Always use additives formulated for your paint base-acrylic/latex with acrylic additives, oils with oil-compatible mediums-because incompatible chemistries cause poor mixing or curing failure. Check manufacturer notes and ASTM guidance to confirm pigment stability, adhesion, and lightfastness won’t be altered. Match solvent systems: water-based additives for waterborne paints, solvent-based for solventborne paints, or you risk coagulation, skinning, or loss of film integrity. Consider how thickeners, flow improvers, and retarders affect gloss, dry time, and flexibility relative to substrates and topcoats. Whenever combining additives, test small batches initially to catch gelling, syneresis, or adhesion loss.
Desired Finish Effect
Because the finish you pick directly changes how viewers see color and texture, choose additives with a specific visual goal in mind-matte for low-reflection, archival-looking work; satin for softened highlights; gloss for richer color and highlighted brushwork. Decide how much sheen you want: gloss deepens saturation and contrast and brings out brushstrokes and impasto; matte mutes glare, hides surface irregularities, and produces a flat, photographic-friendly look. Recall some mediums dry crystal clear while others add a subtle haze or tint-always test on a sample to confirm color shifts. Also weigh practicality: high-gloss surfaces resist dirt and clean easily, while matte finishes suit non-reflective gallery pieces. Make your finish choice to support both aesthetic and conservation goals.
Viscosity And Flow Control
Control paint flow through choosing the right additives and adjusting ratios to suit your technique: thickeners give you body for impasto and brushwork, while flow improvers lower surface tension for smooth leveling and pours. You’ll use viscosity modifiers to move between syrupy and pourable-thicker mixes hold peaks and texture, thinner ones self-level and spread. Flow improvers improve wetting and reduce surface tension without changing color or markedly slowing drying, so they’re ideal for fluid art and smooth finishes. Keep ratios conservative: single-digit volumes often suffice; too much can weaken the film or affect drying. Match additive type to technique, and tweak amounts for temperature and humidity to maintain consistent behavior and avoid sagging, cracking, or unexpected flow.
Drying Time Considerations
As you select additives, consider about how they change both surface skinning and through-drying: some solvents or polymer modifiers stretch acrylics’ working time from minutes to hours, while water thins surface drying but can weaken the final film. Decide whether you need delayed surface skinning (open working time) or longer through-drying (full cure); some additives only affect one. Bear in mind thicker layers and impasto dramatically extend cure-what dries tacky overnight could take days or weeks through. Match additives to ambient conditions: heat and low humidity speed drying, cool humid rooms slow it, so reduce retardants in warm studios and increase them whenever you need more blending time in cool spaces. Always test ratios to balance workability with final film strength.
Surface And Environmental Use
After you’ve balanced working time and cure, consider where and on what you’ll use the medium. Check substrate compatibility-confirm the label lists paper, canvas, wood, fabric, or plastics-since some additives bond to porous surfaces but not nonporous ones. Reflect on indoor versus outdoor use: choose water-resistant or exterior-rated mediums for pieces exposed to moisture to prevent degradation, yellowing, or washout. Verify flexibility and adhesion for flexible supports like shoes or fabric so the additive won’t stiffen and crack. Match recommended thickness and curing behavior to the support; heavy impasto or textured additives need rigid anchors to avoid sagging or fissures. Finally, confirm the medium’s finish (matte, satin, gloss) and clarity suit your desired appearance and any later varnishing.
Safety And Toxicity Levels
At the moment you’re choosing a paint medium or additive, prioritize safety and toxicity information so you know what hazards and precautions are involved. Check labels for conformity to recognized standards (for example ASTM D4236) or explicit “non-toxic” certification so you know products were evaluated for chronic hazards. Review the MSDS/SDS for hazard classifications, required PPE, first‑aid measures, and long‑term exposure warnings before use. Observe whether the medium is water‑based or solvent‑based: solvent‑based additives can emit VOCs and need stronger ventilation and respiratory protection. Watch flammability, skin/eye irritation, and sensitization statements-avoid prolonged skin contact and use gloves and eye protection whenever indicated. Consider environmental and disposal guidance (bioaccumulation, aquatic toxicity, waste handling) to minimize harm.
