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How to Build a Simple Polyurethane Brush-up Mold with Matt Lewis

How to Build a Simple Polyurethane Brush-up Mold
Build a Brush Up Mold! Learn a more advanced technique for building molds

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  • Lesson Details
Matt Lewis
Modeling & Sculpture
1h 39m 36s

Artist and master mold maker Matt Lewis will walk you through how to create a more advanced polyurethane brush-up mold for more complex clay sculptures. You will learn how to make the most economical and high quality brush-up mold possible, as well as gain the technical knowledge that will enable you to solve major molding problems.


  • 3/4″ x 18″ x 18″ Melamine Board
  • Lazy Susan
  • Vaseline and Odorless Mineral Spirits Mold Release
  • Latex or Rubber Gloves
  • 1 ” and 2″ Chip Brushes
  • RTV Liquid Urethane Mold Rubber
  • 1 Quart Buckets
  • Paint Stirrer
  • AeroSil Fumed Silica (Thickener)
  • Stainless Steel Mold Making Spatula
  • Sharpie Marker
  • Laguna WED Clay
  • Putty Knife
  • Electric Drill
  • Stainless Steel Tube (Shapened on the Inside Edge with Dremel Tool)
  • Short Bolts
  • Ease Release 200 Spray
  • Utility Knife
  • USG Hydro-Cal
  • Chopped Strand Fiberglass
  • 5 Quart Bucket
  • Mold Knife
  • Stanley Shaver 7 1/2″
  • 3/4″ Paddle Drill Bit
  • 1/4″ Drill Bit
  • Flat Screwdrivers
  • Double Face Sledgehammer
  • Scalpel with Hooked Blade
  • 1/4″ Bolts

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