Paint mediums and additives are essential for modifying paint properties, enabling artists and DIY enthusiasts to achieve specific finishes, textures, and application characteristics. They are typically used to extend open time, improve flow, or prepare paints for specialized surfaces like fabric or glass. Products were evaluated based on performance enhancement, specialized application capabilities, user reviews, and feature analysis.
Flood 1 Gal. Floetrol Latex Paint Additive
$17.98
This gallon-sized Floetrol offers excellent versatility for improving latex paint performance and sprayability across larger projects.
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Flood Floetrol 1 qt. Clear Latex Paint Additive
$10.98
The quart-sized Flood Floetrol provides the same performance benefits for latex paints in a more economical volume for smaller tasks.
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Retarder by GOLDEN, 8 fl oz. / 237 ml bottle, Professional Acrylic Fluid Mediums and Additives
$16.99
GOLDEN Retarder is a professional-grade additive specifically formulated to significantly increase the working time of acrylic paints for artistic techniques.
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- IMPROVES PAINT FLOW & LEVELING: Floetrol latex paint additive conditions acrylic and latex paint so it flows smoothly, self-levels, and dries to a professional finish without thinning.
- ELIMINATES BRUSH & ROLLER MARKS: Extends open time so paint stays workable longer, erasing lap lines, brush strokes and roller stipple on walls, trim, cabinets and doors.
- SPRAYS LIKE OIL-BASED PAINT: Reduces tip clogging and piston freeze-up in sprayers and cup guns, letting water-based latex atomize and spray as smoothly as oil-based coatings.
- PERFECT POURING MEDIUM FOR ACRYLIC ART: A go-to additive for fluid art and paint pouring - creates cells, improves consistency and helps colors flow without cracking.
- IMPROVES PAINT FLOW & LEVELING: Floetrol latex paint additive conditions acrylic and latex paint so it flows smoothly, self-levels, and dries to a professional finish without thinning.
- ELIMINATES BRUSH & ROLLER MARKS: Extends open time so paint stays workable longer, erasing lap lines, brush strokes and roller stipple on walls, trim, cabinets and doors.
- SPRAYS LIKE OIL-BASED PAINT: Reduces tip clogging and piston freeze-up in sprayers and cup guns, letting water-based latex atomize and spray as smoothly as oil-based coatings.
- PERFECT POURING MEDIUM FOR ACRYLIC ART: A go-to additive for fluid art and paint pouring - creates cells, improves consistency and helps colors flow without cracking.
- A binder-free aqueous solution with surfactants.
- Use in conjunction with any acrylic medium or acrylic color when increased flow and absorption and decreased film tension and friction are required.
- Great for staining effects on raw canvas.
- Refined linseed oil is the most commonly used oil by artists
- Add to other oils to slow drying
- Reduces oil color consistency
- Increases gloss and transparency
- A fluid medium incorporating an acrylic polymer with ultimate flexibility and adhesion.
- Enhances the workability of acrylic paint on fabric.
- Controls bleeding of colors thinned with water.
- Creates a matte, non-reflecting finish when added to acrylic colors
- Lightweight, non-toxic; Opaque when wet, translucent when dry
- Intermixable with Liquitex Professional Acrylic Paint Colors and Mediums
- Conforms to ASTM D4236; Safe for educational use
- Essential Fabric Medium - Turns acrylic paint to fabric paint. This high-quality fabric medium is specially designed to improve flow, flexibility, and adhesion when mixed with acrylic paint. It prevents cracking and flaking on textiles, allowing your art...
- Easy To Use - Mix with acrylic paint by 1:1 ratio (adjust the ratio according to consistency of your paint)to convert to fabric paint, making the paint flexible to move with the fabric and prevent flaking. No heat setting required. Try textile painting...
- Waterproof & Fade Resistant - One of the key features of fabric paint is its water-proof properties. Once applied and dried, fabric paint forms a protective layer on the fabric surface, making it resistant to water damage. This attribute ensures that the...
- Wide Applications - Ideal for DIY fashion and textile projects, this fabric medium is compatible with acrylic paint on T-shirts, jeans, canvas bags, shoes, cushions, leather, and more. Perfect for freehand designs, stenciling, fabric dyeing, and textile...
- Gives Pearlescent Or Glitter Effects To Watercolors
- Particularly Effective When Mixed With Transparent Colors
- Especially Effective Over Dark Backgrounds
- Country Of Origin : France
- A unique formulation that extends drying time up to 40% for blending with acrylics
- Lightweight, non-toxic and dries to a water-resistant, non-yellowing surface
- Includes 4-oz / 118ml bottle of medium
- Intermixable with Liquitex Professional Acrylic Paint Colors and Mediums.
- A binder-free fluid with slow drying agents
- Increases ‘open‘ (working) time of acrylic paint
- Reduces paint skinning-over on palette
- Increases blending time, making blending of colors and detail brushwork easier
This article is part of our complete guide Paint & Wall Treatments — browse all our comparisons and buying guides.
Last update on 2026-10-16 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Paint Mediums Additives
Understanding Your Paint Type and Application
The first critical step in selecting a paint medium additive is matching it to your specific paint type and intended application. For instance, if you're working with latex or acrylic house paints for home improvement, products like Flood Floetrol are designed to improve flow, reduce brush marks, and allow for a smoother, more even coat. These additives are primarily for architectural or decorative painting on walls and trim. In contrast, if your project involves transforming standard acrylic paints into fabric paints, a specialized product like Nicpro Professional Effects Fabric Medium is essential. It ensures proper adhesion and flexibility on textiles, which a general-purpose latex additive cannot provide. Professional artists working with high-quality acrylics might opt for brands like GOLDEN, whose retarders are formulated to integrate seamlessly with artist-grade pigments without compromising color integrity.
Desired Effect and Finish
Different additives are formulated to achieve distinct effects. If your goal is to extend the drying time of acrylic paints for wet-on-wet blending techniques, a retarder from a brand like GOLDEN is precisely what you need. Users report a noticeable increase in open time, allowing for more intricate work. For those aiming for a smooth, high-gloss, and scratch-resistant finish on non-porous surfaces like glass, Liquitex Professional Effects Medium, Glass Medium is specifically designed for this purpose, often requiring heat curing to achieve its full durability. If improving the flow and leveling of a standard latex paint is the primary concern, making it spray like an oil-based paint, then Flood Floetrol products are typically the go-to choice, also offering mildew resistance in practice.
Volume and Project Scale
Consider the scale of your project when selecting the volume of your additive. For large-scale home improvement projects, purchasing a Flood 1 Gal. Floetrol Latex Paint Additive makes practical sense, offering ample product to cover significant areas without needing frequent refills. Conversely, for smaller artistic endeavors, specialized mediums like Nicpro Professional Effects Fabric Medium or GOLDEN Retarder are typically available in smaller, more manageable bottles (e.g., 8 fl oz), which are sufficient for numerous art pieces. The main difference is often cost-effectiveness per volume and suitability for the project's scope, with larger containers being more economical for extensive work.
Pros & Cons
Flood Floetrol 1 qt. Clear Latex Paint Additive
Pros
- Significantly reduces brush and roller marks for a smoother finish in latex paints.
- Improves paint flow, allowing latex paints to be sprayed with an oil-based paint-like consistency.
- Contains mildewcides to resist mildew growth, maintaining a fresh appearance over time.
Cons
- Specifically designed for latex and acrylic paints, not suitable for oil-based or specialized art paints.
- Smaller 1-quart volume may not be sufficient for larger painting projects.
Nicpro Professional Effects Fabric Medium, 8.45oz Bottle Fabric Painting Acrylic Fluid Medium, Improves Acrylic Paint Adhesion to Fabrics, Textiles for Fabrics DIY Clothing, T-shirts, Shoes Jeans Bags
Pros
- Effectively converts standard acrylic paint into durable, washable fabric paint.
- Easy to use with a clear 1:1 mixing ratio recommendation, adaptable to paint consistency.
- Once cured, provides waterproof and fade-resistant results on fabrics and textiles.
Cons
- Exclusively for fabric applications; not suitable for general wall painting or artistic canvas work.
- Requires proper curing (often heat setting) to achieve full waterproof and fade-resistant properties.
Retarder by GOLDEN, 8 fl oz. / 237 ml bottle, Professional Acrylic Fluid Mediums and Additives
Pros
- Effectively extends the open (drying) time of acrylic paints, ideal for wet-on-wet techniques.
- Allows artists more time for blending and manipulating paint directly on the surface.
- Produced by an employee-owned company with extensive experience in professional artist materials.
Cons
- Specifically designed for professional acrylic paints, not intended for latex house paints.
- While it extends drying time, it does not prevent paint from eventually drying, requiring careful timing.
Common Mistakes to Avoid
Incorrect Medium for Paint Type
A common mistake is attempting to use an additive formulated for one type of paint with another. For example, using Flood Floetrol Latex Paint Additive, which is designed for acrylic and latex paints, with oil-based paints will not yield desired results and can compromise the paint's integrity. Always ensure the medium is compatible with your chosen paint type.
Ignoring Mixing Ratios for Specialized Mediums
Users often overlook specific mixing ratios, especially with specialized products. The Nicpro Professional Effects Fabric Medium, for instance, recommends a 1:1 ratio with acrylic paint. Deviating significantly from such guidelines can lead to poor adhesion, uneven color, or a finish that isn't waterproof or fade-resistant, as intended.
Misunderstanding 'Open Time' with Retarders
When working with products like GOLDEN Retarder, some users expect paint to remain wet indefinitely. While a retarder significantly increases the open (drying) time of acrylic paints, it does not prevent them from eventually curing. Mismanaging this extended time can lead to overworking the paint or unexpected drying before a technique is completed.
Improper Curing for Surface-Specific Mediums
For mediums designed for slick, non-porous surfaces, such as the Liquitex Professional Effects Medium, Glass Medium, proper curing is often critical for durability. Failing to follow heat-curing instructions, when applicable, can result in a finish that is not as scratch-resistant or as adherent as advertised, potentially leading to premature peeling or damage.
