Liquitex Professional Fluid Medium 3.78L Gloss - Extend & Gloss

In this review of the Liquitex Professional Fluid Medium 3.78L Gloss, the bottom line is simple: this is a practical, large-volume medium for artists who want to thin heavier acrylics and achieve a clear gloss finish without weakening pigment. The reviewer found it especially useful for extending acrylics, improving flow and blending, and preserving color clarity when working on larger canvases or classroom projects. Its 128-oz bottle and compatibility with Liquitex Professional colors make it a solid choice for studios and shared art spaces.

Key Features

• Fluid consistency: The low-viscosity formula reduces the thickness of heavy paints and gels while keeping pigment suspension and flow for smooth applications.
• Large 128-oz bottle: The 3.78L supply is cost-effective for frequent use, classroom settings, or studio production runs where a single bottle lasts through many projects.
• Gloss finish: It produces a clear, glossy surface that enhances color saturation and depth when mixed with acrylic paints.
• Intermixable with Liquitex products: Designed to blend seamlessly with Liquitex Professional acrylic colors and mediums for predictable handling and results.
• Conforms to ASTM D4236: The formulation meets safety standards and is suitable for educational use, giving instructors and parents reassurance.

Who It's For

This medium is best for professional and student artists who work with acrylics and need a reliable gloss extender that improves flow and reduces viscosity without sacrificing color clarity. It suits painters working on larger pieces, muralists, and instructors stocking classrooms who benefit from the 128-oz volume.

Less suitable for artists who only use small amounts of medium or prefer matte or textured finishes; those users may prefer smaller bottles or different finish types. If a gel-like body or texture retention is a priority, a heavy body gel medium would be a better fit than this fluid medium.

Pros & Cons

Pros

• Works well to thin heavier paints and gels while maintaining pigment strength and gloss.
• Good value for money in a large 128-oz size that lasts through many projects.
• Dries to a glossy finish that enhances color richness and surface sheen.
• Easy to apply and mixes smoothly with Liquitex Professional acrylics.

Cons

• The gloss finish may be too shiny for those seeking a satin or matte appearance.
• The large bottle size may be unwieldy for hobbyists who rarely use medium.

Specifications

Product	Liquitex Professional Fluid Medium, Gloss
Volume	3.78 L (128 oz)
Consistency	Fluid, low viscosity
Compatibility	Intermixable with Liquitex Professional acrylic paints and mediums
Finish	Gloss
Safety	Conforms to ASTM D4236; safe for educational use

Our Verdict

The Liquitex Professional Fluid Medium 3.78L Gloss is recommended for artists and instructors who need a dependable gloss extender in a large size that stretches paint, improves flow, and intensifies color depth. It represents good value for studios and classrooms; hobbyists who prefer matte finishes or who use small quantities should consider alternate sizes or finishes.

Frequently Asked Questions

Can this medium be mixed with student-grade acrylics?
Yes, it intermixes with Liquitex Professional acrylics and is compatible with many acrylic paints to reduce viscosity and add gloss, though results may vary with different formulations.

Will it affect drying time?
The fluid medium can extend open working time slightly and improve blending, but it still dries to a durable gloss film typical of acrylic media.

Is this safe for classroom use?
Yes, the product conforms to ASTM D4236 and is indicated as safe for educational settings.