Sinkits XL Undercounter Sink Mounting System

Fast, secure, adhesive-free undermount sink installation for granite, quartz, concrete, and other solid surface countertops.

Looking for a Stronger, Faster Way to Install Undermount Sinks?

The Sinkits XL Undercounter Sink Mounting System is a patented, industry-leading sink mounting solution that allows professional countertop fabricators and installers to mount undermount sinks quickly, securely, and without epoxy or adhesives. Designed specifically for natural stone, engineered stone, quartz, granite, and concrete countertops, Sinkits XL helps reduce installation time while providing exceptional holding strength.

The updated XL design features a longer anchor post, allowing it to accommodate thicker sink rims than the standard Sinkits system. Standard Sinkits are designed for sink rims up to 3/4" thick, while the Sinkits XL system accommodates sink rims up to 1-1/8", making it ideal for many of today's heavier commercial and premium undermount sinks.

Because Sinkits are installed during fabrication, sink mounting holes can be drilled accurately in the shop rather than in the field, reducing installation errors and minimizing costly callbacks.

For a complete installation solution, pair Sinkits XL with our countertop installation accessories, undermount sinks, and professional stone adhesives and sealants.

What Fabricators Use Sinkits XL For

• Undermount kitchen sink installation
• Bathroom vanity sink installation
• Granite countertop fabrication
• Quartz countertop installation
• Concrete countertop projects
• Commercial sink installations
• Countertop replacement projects
• Residential remodeling

Advantages

• Patented professional sink mounting system
• Fast, simple, and secure installation
• No epoxy or adhesives required for mounting
• Longer anchor post accommodates thicker sink rims
• Supports hundreds of pounds
• Recommended by major CNC router manufacturers
• Works on both 2 cm and 3 cm countertops
• Zinc trivalent corrosion-resistant coating
• Made and sourced in the USA

Specifications

• Designed for undermount sink installation
• Compatible with granite, quartz, concrete, and solid surfaces
• Works with 2 cm and 3 cm countertops
• Standard Sinkits fit sink rims up to 3/4"
• Sinkits XL accommodates sink rims up to 1-1/8"
• Anchor post length: 1-1/8"
• Zinc trivalent protective coating
• Made in the USA

Installation Highlights

• Recommended drill speed: Minimum 3,000 RPM
• Designed for precise shop installation
• Binding tab helps prevent clamp movement during tightening
• Top bolt tightens securely against the sink rim
• Do not overtighten during installation

Applications

• Granite countertops
• Quartz countertops
• Concrete countertops
• Natural stone countertops
• Kitchen remodels
• Bathroom vanities
• Commercial countertops
• Custom fabrication shops

Why Choose the Sinkits XL Mounting System?

Traditional sink mounting methods often rely on adhesives, wood supports, or complicated bracket systems that increase installation time and create opportunities for field errors. Sinkits XL simplifies the entire process by allowing accurate installation during fabrication while providing exceptional holding power after installation.

The longer anchor post makes the XL version ideal for thicker sink rims used in many modern stainless steel and composite sinks. Combined with the patented binding tab and corrosion-resistant zinc trivalent coating, Sinkits XL provides a dependable long-term mounting solution trusted by professional countertop fabricators.

Whether you're fabricating granite, quartz, or concrete countertops, Sinkits XL helps reduce labor, improve installation consistency, and minimize costly callbacks.

BB Industries carries countertop installation accessories, undermount sinks and accessories, material handling equipment, fabrication tools, and professional shop supplies trusted by countertop professionals throughout North America.

BB Industries has you covered!

Frequently Asked Questions

What is the difference between Sinkits and Sinkits XL?

The Sinkits XL system features a longer anchor post that accommodates sink rims up to 1-1/8" thick, while the standard Sinkits system is designed for sink rims up to 3/4".

Do Sinkits XL require epoxy or adhesives?

No. The Sinkits XL mounting system mechanically secures the sink, eliminating the need for adhesives or epoxy as the primary mounting method.

What countertop materials are compatible?

Sinkits XL works with granite, quartz, concrete, and virtually any natural or engineered stone countertop material.

Can Sinkits XL be used on both 2 cm and 3 cm countertops?

Yes. The system is designed for installation on both 2 cm and 3 cm countertop materials.

Why do professional fabricators choose Sinkits?

Because the system allows mounting holes to be accurately drilled in the shop, reduces installation time, minimizes callbacks, supports heavy sinks, and provides one of the fastest and most reliable undermount sink installation systems available.