Heavy-Duty Undermount Sink Support Bracket System (Pack or Box)

Prevent sagging, leaking, and costly stone cracking with an unyielding support system built for undermount sinks. Relying solely on silicone or rim clips attached to stone countertops leads to failure over time—especially with heavy cast iron or large double-bowl sinks filled with water and cookware.

Our heavy-duty steel Sink Support Brackets mount securely to interior cabinet side walls or front-to-back stretchers. By supporting the sink rim directly from underneath, this bracket system distributes hundreds of pounds of downward force safely into the cabinet box, ensuring a permanent, watertight seal between your sink and countertop without requiring wood framing or custom scribing.

Key Features & Benefits