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Granatex solid surface filler products are now
Marshall Gruber Company product.

View Granatex products on the
Marshall Gruber website at

These products continue to be available
from Gruber Systems as well.
Products | Supplies | Hats
Hats Print
Hats are a time, saving, but also cost-effective alternative to a more expensive, labor-intensive female mold. A number of hat types are available: one-time use (permanent hats), and hats that can be used for a limited number of casting cycles (reusable hats). Another product related to the reusable hat is the reusable funnel, and is used in conjunction with a reusable hat to help avoid spillage of matrix as its poured into the mold.

permenantHatPermanent Hats

These hats become a permanent part of the marble product, providing a finished underside which requires very little, if any, additional finishing.

Try our new lower-cost Improved Line (IL) hats - superior quality, and lower cost too!

ReusableHatReusable Hats

Unlike Permanent Hats, these Gruber Reusable Hats can be used repeatedly. They are manufactured of high quality polyethylene. The hats shown are Trimmed with Overflow. To order Untrimmed Hats with Overflow, contact your Gruber sales representative.

PolyfunnelReusable Funnels

Reusable Funnels are used in conjunction with Gruber Permanent and/or Reusable Hats to reduce spillage and wastage of cultured marble matrix during filling of the mold. Manufactured of high quality polyethylene, these qualify hats can be used multiple repeatedly and clean up by flexing the material. Order the version with the hole opening that matches your permanent or reusable hat.