
1384 Bungalow Rd.
Morris, Illinois, U.S.A.
Substrate Technology, Inc.
Prep/Master® Grinders, Dust Collectors, and Diamond Systems
Substrate Technology
This is our own line — the equipment and tooling we build, brand, and stand behind. As the makers of the Prep/Master® grinder and the source for STI diamond tooling, polishing systems, and patented terrazzo pads, we bring you products engineered from decades of real-world surface prep experience — and backed by experts who actually know the work. Call and talk to a real surface-prep expert, not a call center.
The Prep/Master® Grinder
The heart of our line: the Prep/Master® grinder — our own low-maintenance, gear-to-gear concrete grinder and polisher, built to last and available in a range of sizes. We design it, build it, and support it in-house. Learn more about the Prep/Master.
FL-07 Diamond Pads — Our #1 Patented Pad
Our best-selling pads, period: the FL-07 diamond pads are patented and exclusive to Substrate Technology — you can't buy them anywhere else. They're the go-to polishing pad for contractors who know them, fitting a wide range of grinders, and they deliver a consistent, high-quality polish step after step. We also offer them in a ring-type version for hand grinders for edges and detail work. There's one source for FL-07 — and it's us.
STI Diamond Systems & Tooling
Our color-coded diamond polishing systems (CLC, EGT, and TPS) take you from grind to polish on concrete and terrazzo — and we make the full range of STI diamond tooling to go with them:
- Diamond tooling — grinding segments, prep tools, and polishing pads
- Surface prep tooling — for coating and adhesive removal
- EG attachment holders, adapters, and the parts that tie it all together
5″ Razor Polishing Pads, Ceramic
- 5-inch ceramic-bond (hybrid) diamond polishing pads, Razor line
- Durable bond for longer life and efficient cutting
- Available in a progression of grits
- Run wet or dry
- Mount on a standard 5″ backer/holder for a hand grinder
7″ Razor Polishing Rings, Ceramic
- 7-inch ceramic-bond (hybrid) ring-type polishing pads, Razor line
- Durable bond for longer life and efficient cutting
- Flexible ring design conforms to contours and clears slurry
- Available in a progression of grits
- Run wet or dry
- Mount on a standard 7″ backer/holder for a hand grinder
STI Turbo Cups
- Use wet or dry
- Used for first cut/closing cuts on new or existing epoxy/portland terrazzo
- Metal bond diamond for aggressive cutting
- 3″ diameter
- Available in Quick Change attachment or EZ Bolt-on (5/8″–11 arbor)
- 16, 24, 40 and 80 Grit
STI Dual Segment Red Traps for Prep Master Junior
- 30 Grit – soft bond
- Only for machines under 500#
- For medium-hard to hard concrete
- STI EG Quick Change Attachment
SPIN-V2 Heavy Duty Concrete Polishing Pad
- Diamond-impregnated natural hair pads
- Heavy duty diamond formulation
- For maintenance of polished concrete
- Diameters: 17, 21, and 27 in.
- Available grits: 200, 400, 800, 1500, 3000, and Buff
IMPACTS Blast Wheel Kits
- Thick impeller design
- Hard casting metallurgy (manganese)
- Easy to change
- Can also be used in other existing shot blasting machines
- Available for all sized models of IMPACTS shot blasters
Steel Shot Abrasive
- Tiny steel pellets used as media for shot blasting machines
- For surface prep, cleaning, stripping, descaling, or leveling concrete or metal surfaces
- Creates a light to medium surface profile (shot grit size will determine desired finish)
- Available in 50 lb. bags
Dust Collector 2″ Hose with cuffs
- Double profile I-Helix construction for easy movement on surfaces
- Ideal for both truck-mounted & portable carpet cleaning units
- Very flexible
- Superior abrasion resistance
- Crush resistant
- Designed to resist corrosion caused by the combination of hot water & chemical concentration of detergents
- All sizes handle a full vacuum
- Smooth interior assures efficient air flow
- Made with factory-installed polyweld cuffs
- Length 25 feet
Honeycomb Edge Pads
- Diamond honeycomb-pattern edge polishing pads
- Designed to reach walls, edges, and corners
- Mount on a backer/holder for a hand grinder
- For use with variable speed hand grinder
- For Dry Use Only
- Grits 30, 50, 100, 200, 400, 800, 1500, 3000
EG 8 Segment Daisy’s
- 3″/76mm Metal Bond diamond
- Great for polishing preparation on concrete, granite, and terrazzo
- Sintered diamond technology for smooth cut
- Wet use only
- Available in 30 & 70 Grit
Patented, Exclusive Terrazzo Pads
Some of our products you can’t get anywhere else. Our patented STI terrazzo pads — like Terrazzo+, Terrazzo REDZ, and our terrazzo polishing pads — are exclusive to Substrate Technology. We hold the patent, so no other supplier can offer them. See our terrazzo tooling.
Built and Backed by STI
When you buy STI, you get more than a product — you get the company behind it: in-house engineering, Lavina-certified, nationwide service, a 1-year repair warranty, and real experts on the phone. Service. Support. Success.
Order STI Equipment Today
Call (815) 941-4800 x 1 or fill out our contact form. See our machines, diamond systems, and diamond tooling.









