Oatey K820-21 Puttyless Sink Strainer Gasket

Product Description

The OATEY K820-21 is a puttyless sink strainer gasket designed to create a watertight seal between a sink strainer body and the sink basin without the need for plumber's putty. This gasket serves as a critical sealing component in kitchen and utility sink drain assemblies, preventing water from migrating between the strainer flange and the sink surface. Its puttyless design simplifies installation and reduces the risk of putty staining or degrading certain sink materials. Plumbers and experienced DIYers install this part during new sink setups or when replacing a leaking strainer assembly.

This gasket is suited for residential kitchen sinks, laundry sinks, and utility basins where a standard sink strainer is used. It is particularly useful in applications involving composite, acrylic, or coated sink surfaces where plumber's putty is not recommended by the sink manufacturer. The K820-21 is sold as a single unit and is compatible with strainer assemblies that follow standard drain opening dimensions.

Key Features

• Puttyless design eliminates the need for plumber's putty during strainer installation
• Creates a watertight seal between the strainer flange and the sink basin
• Suitable for use with composite, acrylic, and coated sink surfaces
• Compact, low-profile form fits standard strainer assemblies
• Lightweight construction at 0.17 pounds for easy handling on the job

Compatibility

Designed as an OEM-style replacement gasket for standard residential and light-commercial sink strainer assemblies. No specific model compatibility was provided in the product data.

Installation Notes

Installation is typically performed by a licensed plumber or experienced tradesperson during sink strainer replacement or new drain assembly work. Shut off the water supply and clear standing water from the sink before beginning work. Seat the gasket evenly under the strainer flange before tightening the locknut from below to ensure a uniform seal. Avoid over-tightening the strainer body, as this can distort the gasket and cause leaks.