A seal coat is the foundation of a successful resin project. Applied at approximately 1/16 inch depth, it seals porous surfaces—including paper, raw wood, acrylic paint, and fabric—to prevent trapped air from creating bubbles in later coats. Use our Epoxy Resin Calculator to determine how much resin you'll need for your seal coat before mixing.

Mix 10–15% more than your calculated surface area requires. Resin is lost during mixing (it clings to mixing vessels), drips over the edges of gallery-wrapped canvases, and a small amount is always wasted during application. The Epoxy Resin Calculator automatically includes this waste buffer by default, helping ensure you have enough resin to complete your project.

A seal coat should be approximately1/16 inchthick, while a flood coat should be approximately1/8 inch thick. Applying resin too thin can result in an uneven, pulled-back finish, while pouring too thick in a single coat can cause excess heat buildup during curing, leading to yellowing or cracking. The Epoxy Resin Calculato rhelps you estimate the correct amount of resin for both seal coats and flood coats, making it easier to achieve the proper pour depth.

Most artist-grade epoxy resins use a 1:1 mixing ratio—equal parts Part A (resin) and Part B (hardener). The Epoxy Resin Calculator is based on this 1:1 ratio, making it easy to determine how much of each component you'll need. Some specialty resins use a 2:1 ratio, so always check your specific product's instructions before mixing.