Complete guide comparing casting and coating resins. Learn viscosity differences, best applications, and which resin suits your projects.
Resin comes in two main viscosity types: casting and coating. Casting resin is thin and pourable—perfect for molds and large pieces. Coating resin is thick and brushable—ideal for protective topcoats and fine details. Using the wrong type leads to frustration and poor results. This guide clarifies the differences and helps you choose.
The good news: most quality resin brands offer both types. Understanding when to use each transforms your results from mediocre to professional.
| Feature | Casting Resin | Coating Resin |
|---|---|---|
| Viscosity | Thin (pourable) ⭐ | Thick (brushable) ⭐ |
| Best Use | Molds, large pieces | Topcoats, details |
| Application | Pour from cup | Brush or spread |
| Self-Leveling | Excellent ⭐ | Minimal |
| Bubble Control | Good | Excellent ⭐ |
| Depth Capability | 8+ inches possible | 1-2 inches ideal |
| Drying Speed | 24-72 hours | 24-72 hours |
| Price | Standard | Standard |
| Works in Molds? | Yes ⭐ | Difficult (too thick) |
| Detail Work | Moderate | Excellent ⭐ |
Use casting resin for: Filling molds, large pieces (coasters, bowls, trays), jewelry with consistent depth, encapsulation of objects, thick uniform pours. Thin viscosity allows resin to flow into every mold detail.
Use coating resin for: Topcoats on wood, protective finishes on art, detail work, repairs, textured effects, hand-applied applications. Thick consistency stays where you brush it.
Many crafters use both: Casting resin fills the mold, coating resin creates a protective glossy topcoat. This combination delivers professional results—structural body with perfect finish.
You fill molds, pour into containers, create coasters/bowls, or need self-leveling. Casting is versatile for most resin projects.
You apply by brush, create topcoats, do detail work, or finish wood pieces. Coating provides precision application.
You want maximum flexibility. Many professional crafters use casting for the piece and coating for the finish—this delivers premium results.
Bottom Line: Casting and coating resins solve different problems. Most quality brands offer both. Choose based on how you'll apply the resin, not the end result—both create beautiful, crystal-clear finishes.
Most quality resin brands offer both casting and coating types. Check product details before buying to ensure you get the right viscosity.