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The Seam Phantom is a tool that has revolutionized the way to create perfectly straight, chip-free seams that become nearly impossible to differentiate from the rest of the stone. Using either an electric or pneumatic power tool, carriage rides along a straight edge called a Glide Guide at a precise perpendicular angle to the stone. The Glide Guide is positioned using specially designed gauging blocks. Once the guide is aligned, it is clamped into place and the dressing process can begin.

The first step uses an undersized cup wheel that grinds a channel below the surface of the stone. There is a precise adjustment on the tool that allows the user to remove material at exactly the depth desired. This allows for your adhesive of choice to be below the seam, eliminating the need to color match it. The second step is the dressing of the seam edge. Using at most a three-step series of honing pads, the seam is dressed to remove any waves or chips in the seam. The three steps are the 60 grit, 150 grit, and 300 grit SL3 Turbo Pads. Each pad is run along the seam using the distance adjustment to remove any imperfections. The third and final step is checking the seam with a straight edge to ensure you have removed any waves or unseen chips. The seam is now ready to be installed using a recommended seam joining tool, to ensure you get a tight and level seam. Once your customers are unable to easily distinguish the seams that you can provide, your reputation and product quality will surely rise to the next level.

The Air version works with multiple types of Air Polishers that we carry: Eg. Alpha Air-658, Alpha Air-680, Barranca BD-2321, Flex PLW923S, Weha QB9, or the Cyclone MVP or Gison GPW-7 (14mm arbor), as well as others that we do not carry(Maximum polisher nose diameter is 2.125"). All Air Polishers Sold Separately.

Package includes everything listed below:

  • Seam Phantom®
  • Adapter for Air Tool
  • Arbor Extension (Also Available in M14 Thread)
  • 48″ Glide Guide Rail (72″/96″ Sold Separately)
  • SL3 Adapter (Also Available in M14 Thread)
  • 60 Grit SL3 Rigid Turbo
  • 150 Grit SL3 Rigid Turbo
  • 300 Grit SL3 Rigid Turbo
  • 2″ SL3 Cup Wheel2 C-Clamps (For clamping Glide Guide)
  • Gauge Blocks
  • Angle Adjustment Washers
  • All Required Hardware
  • Instruction Manual
  • Polisher NOT Included
  • Made in U.S.A.


This instructional video takes you step by step through the process using the Phantom SL3 abrasive system. This is an indispensable tool for Stone Fabricators wanting nearly invisible seams - a way to provide the best quality installation possible!


Seam Phantom:

WARNING: This product can expose you to
chemicals including Lead, which is known to the
State of California to cause cancer and birth defects
or other reproductive harm.
For more information go to, www.P65Warnings.ca.gov

Glide Guide:

WARNING: This product can expose you to chemicals including Nickel acetate, which is known to the State of California to cause cancer.
For more information go to, www.P65Warnings.ca.gov


Turbo Disc:

WARNING: This product can expose you to chemicals including 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to, www.P65Warnings.ca.gov

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Seam Phantom Air Tool Package

  • Brand: NSI Solutions
  • Product Code: NSI-SP-A2
  • Availability: In Stock
  • $1,460.00