Understanding which thinner to use for epoxy paint is essential for achieving the right finish, flow, and control in your resin projects. This page is tailored for DIY enthusiasts, artists, and professional makers who need guidance on thinning or adjusting epoxy resins for painting applications. We’ll compare leading products, highlight differences in viscosity and application, and help you select the best resin for your needs—whether you seek a flawless topcoat or require deeper casting with perfect flow.

Comparing Epoxy Paint Resins and Viscosity: Thinner Choices Explained

When working with epoxy paint, viscosity is the key deciding factor. Some epoxy resins are designed with low or super-low viscosity for ease of flow and self-levelling, while others have high or ultra-high viscosity for precise artistic work. The choice of thinner—or often, the lack of need for an external thinner—depends largely on your chosen resin and project requirements. Most high-quality epoxy resins for art and finishing are engineered to provide optimal flow without the need for additional thinning agents. However, select resins allow for the addition of small percentages of specialised epoxy thinners (never standard solvent-based thinners) for specific techniques. We’ll compare four major product choices and clarify when, or if, a thinner is needed.

Epoxy Paint Application Gallery

See a range of projects demonstrating different epoxy paint viscosities—from ultra-clear surface coatings to deep pour table resins. Visualise how choosing the right resin affects your finish and flow, empowering your own creative process. For inspiration, visit our Resins for Pour Paint and Accessories gallery.

“Art Pro” – Clear Epoxy Resin for Artists and Surface Coating

Art Pro – Clear Epoxy Resin for Artists and Surface Coating is a medium viscosity resin designed for glass-like finishes on decorative surfaces. Its dense, non-drip formula is perfect for controlled applications like coasters, trays, and canvas pours. With an easy 3:2 mixing ratio and 12–24h cure time, “Art Pro” flows evenly without the need for traditional thinners. This product is best for users seeking a crystal-clear, scratch-resistant surface, and it contains UV filters to stop yellowing. For most applications, thinning is unnecessary—simply ensure careful mixing and pouring for optimal self-levelling and flow.

“EpoxyTable 5-Five” – Deep Pour Epoxy Resin for Tables and Large Projects – Up to 5cm

The EpoxyTable 5-Five resin features low viscosity, making it suitable for bubble-free, deep pouring and table casting up to 5cm thickness. Designed for slow, controlled flow across larger surfaces, it prevents overheating and guarantees a smooth finish without separate thinners. Thinning is not typically required; adjust flow by gentle warming or mixing within manufacturer guidelines if necessary. The long working time also allows careful manipulation of the resin, so there’s plenty of flexibility even for highly detailed work.

“Art Pro Deluxe” – Ultra-High Viscosity Epoxy Resin for Artists

For artists who need ultra-high viscosity for defined colour lines and minimal paint blending—such as in geode art or ocean waves—the Art Pro Deluxe is a premium choice. It is not designed to be thinned, as the high viscosity is essential to its artistic function. Add epoxy-safe pigments if desired, but avoid conventional thinners or water-based dyes as these can compromise the cure and clarity. This resin self-levels surprisingly well, providing a scratch-resistant, glossy topcoat without the need for any further adjustment.

“Epoxytable 10-Ten” – Deep Pour Epoxy Resin for Tables, Up to 10cm Casting

If extreme depth is your goal, Epoxytable 10-Ten takes deep casting up to 10cm with its super-low viscosity formula. This resin’s bubble-free nature and long working time eliminate the need for additional thinners. Designed specifically for large resin art, tabletops, and castings, it is formulated to manage exothermic reaction and flow without extra additives. If working at high volume, layering and careful project planning are recommended, not additional thinners.

How to Choose and Use Epoxy Paints—Tips for Thinning and Application

The majority of professional-grade epoxy resins, whether for art or furniture, are engineered to perform at optimal viscosity and thickness straight from the container. For most projects, adding thinner is not required. If your application is unique and calls for increased flow or extended pot life, always use only manufacturer-recommended thinners (never generic solvents or water), and limit additions to the stated safe percentage—usually no more than 5%. Avoid attempting to thin ultra-high viscosity resins unless the manufacturer specifies compatibility. For best results, work in a temperature-controlled environment, mix and degas your resin carefully, and pour or apply in layers following the recommended cure schedule for your chosen product.

Practical Tips for Thinning Epoxy Paint

Never use standard paint thinners or water with epoxy resin, as these will compromise the cure and clarity. For optimal application, always follow the product instructions and select a resin with the flow properties matching your project’s needs. For artistic effects, temperature and controlled mixing are your best tools for minor adjustments. To see more epoxy paint techniques, explore our resins for tables and surfaces finishes section.