Product Details:
• Includes 5 foam drain knockouts.
• 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.

• 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 computer cables, etc.).

Shipping Information:
• Product usually ships in 1-2 business days.

Sample Photos:

E-mail a friend about this item.