Concrete Countertop Sink Mold, SDP-31 - Vessel Square 18"

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  • Concrete Countertop Sink Mold, Vessel Square 18-Inch
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Concrete Countertop Sink Mold, SDP-31 - Vessel Square 18"

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Usually takes 1-2 business days to ship. Ships from Utah
Ships via UPS only

Free shipping for online-orders $49 or more!! (US 48)

  • This mold is currently out of product while we remake the molds, and will be made available once they are ready. Thanks, Expressions-LTD.

    Product Specifications:

    • SDP-31 Vessel 18" Square Sink Mold Measurements:
      • Inner Mold:
        • Length: 15"
        • Width: 15"
        • Depth*: 8" (At Drain)
      • Outer Mold:
        • Length: 18"
        • Width: 18"
        • Depth*: 9 1/2"
    Product Description:
    • The Vessel 18" Square Molds create a square, deep vessel sink.  Can be used as a sink, foot soaking basin, hair salon washing sink, etc.
    • A two part mold- Includes the inner SDP-30 Square 15" Mold (also sold individually), and Outer Vessel 18" Square Shell Mold.
    • Our SDP (Super Durable Polyurethane) Line of Sink Molds are made from the highest grade Polyurethane Rubber.  Won't chip and crack like fiberglass, and much easier to get out of concrete after casting. A lifetime of reusability.
    • The Inner Square 15" Mold can be used alone to make integral sinks. If you already have the inner Mold, you can just order the outer shell Mold from the drop-down menu above.
    • Vessel Molds can easily turn leftover concrete into revenue earning concrete sinks.
    • Small style drain for bathroom lavatory size drains.
    • Create a seamless integral concrete sink and counter top, or form around to create a vessel sink.
    • Expressions LTD will not be held liable for any damage, misuse, or collateral damages resulting from use of any of our products. 
    Mold Use:
    • Watch videos of Mold Setup, Casting, and De-Molding/Removal on our Video Page.
    Mold Setup:
    • Apply 2-3 coats of a Mold Release Wax to both Inner and Outer Molds, lightly buffing between coats once it hazes.
    • Apply a thin coat of Form Release to the Inner and Outer Molds.
    • Place Molds together- Secure the inner mold to a casting surface (melamine, HDO Plywood, etc.)  Make measurements/marks to center the Outer Mold over the Inner Mold.  Place Outer Mold over the Inner Mold and secure. 
      • Silicone is usually not needed on these molds, but you may wish to use it to prevent water from seeping out between the two Molds. If you do, just create a very small bead of silicone on the Outer Mold before placing down on the casting board and securing. We have poured many of these sinks and water seepage is very minimal so we do not use silicone (demolding is easier without silicone holding things together).
    • The Mold Halves can be screwed together, or secured to a casting table. 
    Concrete Casting:
    • Typically for concrete countertops, the concrete mix should be an oatmeal consistency. To fill a two part vessel mold, the thicker concrete may not flow easily, and will create a larger-than-normal amount of air pockets and voids. A slightly runnier consistency to the concrete will usually work better with filling a two-part vessel sink.
    • Vibrating the concrete either with a specialized vibrator or vibrating table is recommended. Fast, light tapping on the Outer Mold with a rubber mallet while filling the Molds with concrete will help remove many air pockets.
    • If a drier concrete mix is used, it will create larger voids which can be the desired effect- usually when planning to fill the voids with cement slurry of a different coloring.
    • Any voids in the finished concrete can be filled using a Cement Slurry.
    Mold Removal:
    • If the steps above were followed for the Mold Setup, then most Molds will usually pull out of the concrete with little effort.
    • If the mold is difficult to remove, try:
      1. Compressed air shot around the Mold rim will break the suction holding the Mold in the concrete.
      2. Adding cold water and ice to the inside of the mold for 10 minutes will shrink the mold just enough that removal is easier.
      3. Using a few blocks of foam against the concrete, place a 2x4 across the Mold, and pry the Mold out using some large C-clamps, or wood working clamps. Do not over-tighten the clamps, just put some pressure on them and then resume shooting compressed air around the Mold's rim. Add a little more pressure to the clamps, and repeat the air until the mold comes free.
      4. Most Molds can be pushed out of the concrete by removing the drain hole plug, and pushing the Mold out through the drain hole.
    Mold Clean-up and Care:
    • Clean Mold with a sponge after each use. Any dried cement residue can be removed with a scotch-brite pad (as outlined above in the Mold Setup section. A light muriatic acid wash (20:1, 20 parts water to 1 part muriatic acid) can also remove cement scale.
    • Waxing and buffing the Mold after cleaning it use is recommended to protect the Mold until its next use.