No amount of manufacturing ingenuity can take the place of a quality hand-crafted mold for cast polymer manufacturing. Marshall-Gruber Fiberglass Molds are the highest quality, most durable molds available for cultured marble molds and solid surface manufacturing. The integrity of our products is the result of careful procedures and strict controls. All incoming raw materials are tested to ensure that only quality raw materials are used. Quality control inspections are made four times during our production process, with a final inspection made just prior to shipping.
Before ordering a mold, please review these topics related to mold construction options, mold break-in procedures, etc.
Marshall-Gruber offers an extensive selection of high quality standard production molds to fit your cultured marble, solid surface, or other cast polymer production needs:
Select from Oval or Rectangular Drop-In, or from our freestanding clawfoot tub molds for cultured marble or solid surface casting requirements:
Shower Pan Molds
Highly durable, superior quality production Cultured Marble and Solid Surface Shower Pan molds available in two basic types - single cavity molds, and "Universal" shower pan molds
Choose from the following series or get help selecting the right series.
We also offer shower related accessory molds such as
Shower Seats, Shower Ramps, Thresholds and more.
Bowl & Sink Molds
Hundreds of mold styles to choose from
Floating Bowl Designs
Floating bowls are mounted on custom no-bowl vanity decks to become and integral part of the cast vanity. Bowls can be positioned for any custom installation. All bowl molds are available with fiberglass females, but most bowls also offer reusable and/or permanent hats.
Drop-In Bowl Designs
Drop-in lavatory bowls are also referred to as self-rimming bowls. The drop-in bowl fits through a cut-out in the vanity top. It has a lip or flange that rests on the vanity top holding it in place. In addition to drop-in lavatory bowls, this section includes some drop-in bar bowls.
Explore our other types and styles of bowls and sinks:
Modular Deck Molds
Choice of integral bowls and edge styles
Modular vanity decks are used to produce vanity deck castings. All modular models include an integral backsplash, but you can select from your choice of our most popular vanity bowl designs, as well as edge profiles (straight or dripless). If you prefer a vanity deck without an integral bowl, see our line of No Bowl Deck Molds.
Note: Chamfer Edge Cast Modular Deck shown above.
"No Bowl" Deck Molds
Vanity deck mold without integral bowl mold - just combine with your choice of Marshall-Gruber Floating Bowl Molds
"No Bowl" Deck Molds offer greater flexbility, space-saving and cost savings compared to Modular Deck Molds - in that No Bowl Deck molds do not include and integral bowl or sink. You can purchase a variety of bowl mold separately, and use them with the No Bowl Decks to be able to produce vanities and countertops with a choice of bowl style. Offer your customers more choices, with less invested mold cost using No Bowl Deck molds and our bowl molds. If you prefer a vanity deck mold with an integral bowl mold included, see our line of Modular Deck Molds.
Note: 110 Series No Bowl Deck Mold, 25" wide (110-NB-25) shown above
Wall Panel Molds
Note: Cast Slate Tile Panels shown above.
Gruber offers a variety of panel molds – suited to a broad range of uses – including wall panels, shower and bath surrounds, and decorative wall treatments. Molds are intended for cultured marble and other cast polymer manufacturing methods, and include:
3" x 6" Subway Tile Panel Molds
Glossy or Matte Finish
8" x 8" Bordered Tile Panel Mold
Single 84" x 68"
Textured Panel Mold
Rough, textured surface
Untextured (Smooth) Panel Molds
available in either 3/8" or 3/4"
thicknesses, and in single-cavity or 2-, 3- or 4-cavity models.
A wide variety of trim molds are available to add value and profit, and make your installations stand out above those of your competition. These molds have a lot of uses - limited only by your imagination!
Accenta Decorative Trim
ABC Trim Series
3 complimentary molds
or 1 Combo
TM Trim Series
Window sill molds have a variety of uses for as trim for windows, fireplaces and other uses, as well as a backsplash for countertop applications. Choose from traditional window sill molds, or corniced sill molds.
End Splash Molds (aka "Splash Molds) are used to provide raised back similar to a backsplash to the two sides (end) of a deck mold (either Modular or No-Bowl decks). These End Splash molds allow the cultured marble manufacturer the option of utilizing a longer length deck mold for a variety of lengths, and still be able to provide a "sidewall backsplash" to match whatever backsplash height is included in the deck mold.
Our line includes a multitude of soap dishes, shampoo holders and combination units, shelves, towel bar ends, toothbrush holders, robe hooks, toilet roll holders and more. These items cost very little to manufacture, but can make a huge difference in transforming your customers’ bathrooms from ordinary to truly custom!
Bathroom Accessory Collections
Designer themed collections of bathroom accesory molds for a coordinated bathroom design.
Some unique, creative and different mold options for you to add more value and revenue to your business.
Material Demonstration Samples (Shapes)
Oval, Round or Rectangle shapes, some with OG Edge details.