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Improving Surface Finish When Casting a Rigid or Flexible Foam

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                                       © Smooth-On, Inc. (2005)
 

FAQ:  Is there a way to improve surface finish when casting a rigid or flexible foam?

You can improve surface finish by applying back pressure.

For Example:

Without applying back pressure, surface finish reveals open foam cells.

Drill holes into a board that can cover mold opening during casting.

Apply Ease Release™2831 to board. Pour foam into mold and place board over mold with holes centered over cavity.


Hold board firmly in place until foam stops rising. Let foam cure for 2 hours.


Use a scraping tool to remove excess foam.


Board is removed to reveal flat back of the casting.


Pressure uniformly compressed foam into mold detail resulting in better surface finish.