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How do I decide which method (pour-on vs. brush-on) is best for my project?

A "Pourable" mold rubber is mixed and poured over your original model.

Consider this method if your model is;

  • Flat, two-dimensional (one-piece block mold, two-piece block mold)
  • Small, three dimensional (one-piece block cut mold)

Advantages/Disadvantages - Pourable molds are easier to make vs. brush-on molds, requiring less labor.  They also take less time to make, meaning you will have a mold you can use same day or early next day; however, you use more material to make a mold so your material cost is higher.

A "brush-on" mold rubber is mixed and brushed onto your original model in layers.  After all layers cure (usually overnight), a rigid support shell (also known as a "mother mold") is applied the next day.

Consider this method if your model is:

  • Either two dimensional or three dimensional
  • Small or large
  • Affixed to a vertical surface (like the side of a building) or on a horizontal surface (like a ceiling)

Advantages/Disadantages - Less material, over all, is used to make a brush-on mold so your material cost is less.  However, Brush-On molds take more time and effort to make (much more labor vs. a pourable mold).  Making a brush-on mold is also more challenging and therefore requires a lot more pre-planning.

 

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