Disposable Foam Drain Knockouts

Loading reviews...
$25.09
  • Disposable Foam Drain Knockouts

Disposable Foam Drain Knockouts

Loading reviews...
$25.09
Usually takes 1-2 business days to ship out.

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

  • Product Details:
    • 10-Pack of single-use foam drain knockouts.
    • Available in 2 sizes for Bathroom and Kitchen size drain holes.
    • Sink drain knockouts made from extruded polystyrene.
    • Easy removal- just cut out of cured concrete using a utility knife or flat head screw driver.
    • Freshly cured/curing concrete can crack easily from stress of trying to remove hard objects/mold forms. These foam knockouts are designed for easy removal that won't add stress to the concrete.
    Product Specifications:
    • Measurements:
      • Small: 1-5/8" Diameter*, 2"H.
      • Large: 3-1/2" Diameter*, 2"H.
        • *Diameter sizes may vary slightly, but still fall within sizing needed for drain hardware to fit.
    • To Use-Place drain knockout on Sink Mold with silicone. Optional- run a bead of silicone around the knockout.
    • Wrap foam knockout with Concrete Countertop Form Tape (sold separately) if you need a smooth, glossy concrete surface.
    • Foam knockouts can also be used to create a circular hole in a concrete countertop (for passing phone lines, electrical cords, computer cables, etc.).