EASY mold making and casting with ALUMINUM powder!
by VanOaksProps
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What this video covers
VanOaksProps walks through the complete workflow for duplicating prop parts using a tin-cure silicone mold and cast resin, then finishing the casts to resemble brushed aluminum. The technique — known as cold casting — uses aluminum powder mixed into or applied over resin, with steel wool buffing to bring out a convincing metallic sheen. It's a practical solution for haunters who need multiple identical parts without hand-building each one. The tutorial is kept approachable and concise, making it accessible even for first-time mold makers.
Key takeaways
- ◆Tin-cure silicone (OOMOO 25) is used to create a flexible, reusable mold of an existing part
- ◆Smoothcast 300 resin is cast into the mold to produce duplicate plastic pieces
- ◆Aluminum powder combined with resin tint gives casts a realistic metallic base color
- ◆Buffing the cured cast with fine steel wool brings out a brushed-aluminum surface finish
- ◆This cold-casting workflow is ideal whenever a project demands several matching prop components
Who this is for
Prop builders and home haunters who want to duplicate parts efficiently and achieve a realistic brushed-metal look without machining or painting.
Tools mentioned
- • steel wool (0000 grade)
Materials mentioned
- • Smooth-On OOMOO 25 tin-cure silicone
- • Smooth-On Smoothcast 300 casting resin
- • aluminum powder
- • resin tint
- • mold release
⚠ Safety notes
Casting resins and silicones produce fumes during mixing and curing; work in a well-ventilated area and wear gloves and eye protection. Fine metal powders are inhalable — consider a dust mask when handling aluminum powder.
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