Explore top-grade metal powders designed for cold casting with polyurethane or epoxy resins. This guide highlights select powders that deliver authentic metallic looks—stainless steel, copper, brass, and bronze—for durable sculptures, decorative accents, and art projects. Each entry covers material purity, mesh size, packaging, and practical use notes to help you choose the right powder for your resin casting workflow.
| Product | Brand | Mesh | Packaging |
|---|---|---|---|
| Stainless Steel Powder (1 lb) | ARTMOLDS | 350 Mesh | Plastic jar |
| Copper Powder (1 lb) | holama | 320 Mesh | Aluminum foil-sealed jar |
| Copper Powder (1 lb) | ARTMOLDS | 350 Mesh | Plastic jar |
| Bronze Powder (1 lb) | Metalpowdersusa | 325 Mesh | Plastic pouch |
| Brass Powder (1 lb) | holama | 320-350 Mesh | Aluminum foil-sealed jar |
Artmolds High Grade Stainless Steel Powder
A high-grade stainless steel powder designed for easy cold casting with polyurethane resin. The powder uses uncoated spherical particles that help achieve the look of pewter or stainless steel in sculptures and decorative pieces. The formula is described as lightweight and long-lasting, suitable for quick mixing and pouring into molds. It is intended for straightforward cold casting, combining readily with resin to create metallic effects without specialized equipment.
Premium Copper Powder for Cold Casting Sculptures
Premium copper powder with 99.8% purity, designed for cold casting and potential applications in metal 3D printing. The packaging is upgraded to aluminum foil-sealed jars to guard against oxidation and preserve freshness. The product is marketed with an emphasis on high purity and minimal impurities, though consumers should note that trace elements may be present. The powder can be used with polyurethane or epoxy resins, producing a copper-like finish for sculptures and decorative items.
ArtMolds High Grade Copper Powder
High-grade copper powder for easy cold casting with polyurethane resin. The product aims to create the appearance of solid copper and is suitable for sculptures and copper-themed crafts. It uses uncoated spherical particles to facilitate mixing and casting, with a note that copper patinas over time if left unsealed. The powder is positioned for straightforward resin casting workflows and art projects seeking a copper metallic finish.
Premium Bronze Powder
Bronze powder of 325 mesh with a focus on rapid shipping. Marketed for cold casting and inlays, this powder is positioned to deliver a bronze-like finish when mixed with resins. The description emphasizes suitability for decorative projects and sculpture applications, with an emphasis on ease of use in resin-based casting workflows. Users should verify resin compatibility and desired aesthetic before mixing.
Brass Powder for Cold Casting Sculptures
Brass powder designed for cold casting with a 320 mesh range, marketed for inlay work and home or office decor. The packaging uses aluminum foil-sealed jars to reduce oxidation. The powder is produced through an electrolytic process yielding a high purity level with minimal impurities. It is described as easy to use with epoxy resin, polyurethane resin, or CA glue—suitable for pouring into molds for reliable brass-toned results in crafts and sculptures.
Buying Guide
Powder Purity and Mesh Size
Choose powders with high purity (generally 99% or higher) for authentic metallic finishes. Mesh size affects particle behavior: finer meshes (e.g., 350) produce smoother surfaces; coarser meshes (e.g., 320) can yield more pronounced texture. Consider your mold details and the desired final look when selecting mesh.
Packaging and Oxidation Protection
Oxidation can alter color and finish over time. Look for aluminum foil-sealed jars or airtight packaging to preserve color and prevent tarnish. Wide-mouth jars offer easier access for scooping and mixing powders into resin.
Resin Compatibility
Most metal powders are designed for polyurethane or epoxy resins. Confirm compatibility with your chosen resin system and consider adding a small test batch to dial in mixing ratios and cure times before a full project.
Ease of Use and Application
Some powders are marketed as ready-to-use cold casting formulas with simple mixing guidelines. Others require careful handling to avoid clumping or settling. Follow manufacturers’ mixing instructions and consider the pot life of your resin to determine suitability for larger pieces.
Color and Finish Options
Stainless steel yields a pewter-like sheen, copper and brass provide warm metallic tones, and bronze offers a classic bronze appearance. If a patina or aging effect is desired, sealants and post-processing steps can influence final color and longevity.
Intended Projects
These powders suit sculptures, home dcor, inlays, and jewelry components. For functional items, ensure the final part has appropriate resistance and finish. When in doubt, perform a small-scale test to verify adhesion, curing, and aesthetic outcomes with your resin system.