Cheap & Easy Brush On Silicone Mold
by VanOaksProps
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What this video covers
VanOaksProps demonstrates a budget-friendly approach to mold making using the brush-on silicone method paired with a supportive plaster mother shell — an ideal alternative to expensive block molds for larger objects. The tutorial walks through applying multiple silicone layers with a brush, building a rigid plaster shell over the finished mold, and ultimately casting copies in resin. The technique is well-suited for prop makers who want professional-quality duplicates without the high material cost of full block molds. A lion head sculpt serves as the hero piece throughout the demonstration.
Key takeaways
- ◆Brush-on silicone molds use far less material than block molds, significantly reducing cost for larger subjects
- ◆A plaster of Paris mother shell provides the rigid support structure needed to keep the flexible silicone mold in shape during casting
- ◆Smooth-On Rebound 25 is the featured silicone, applied in multiple brush coats to capture fine surface detail
- ◆Smooth-On Smoothcast 300 resin is used for the final casting step
- ◆Nitrile gloves and a digital scale for accurate mixing ratios are essential for clean, consistent results
Who this is for
Prop makers and Halloween enthusiasts at an intermediate level who want to reproduce detailed sculpts affordably without committing to costly block-mold volumes of silicone.
Tools mentioned
- • nylon brushes
- • hot glue gun
- • shop scale
- • stir sticks
- • X-Acto knife
- • Pica marker
- • mixing bucket
Materials mentioned
- • Smooth-On Rebound 25 silicone
- • Plaster of Paris
- • Smooth-On Smoothcast 300 casting resin
- • hot glue sticks
- • nitrile gloves
⚠ Safety notes
Nitrile gloves are recommended when handling silicone and casting resin. Work in a well-ventilated area when mixing and pouring chemical compounds.
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