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
Wet/Dry 55-Gallon Concrete Vacuum
- Handles both wet and dry pickup
- 55-gallon capacity — the largest in the Titan line
- 2 HP, 2-stage heavy-duty bypass motor (230V option available)
- 115V, 50/60 Hz, with a 35-ft 2-part power cord
- Rear-mounted 3″ quick-drop drain valve — empty large volumes without lifting
- Large 12.5″ top tank access for easy cleaning
- Large rear wheels and front casters; moves loads up to 400 lbs
- Automatic liquid shut-off prevents motor flooding Quiet operation (meets GS42 requirement)
- Includes wet/dry tool kit, 15-ft hose, and washable dust bag; and front-mount squeegee
Dust Collector 3″ 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
Dust Collector 5″ Hose
- Diameter 5 inches
- Length 50 foot
- Abrasion-resistant polyurethane — handles gritty concrete dust that destroys rubber/PVC hoses, for longer life and lower cost
- Transparent “see-the-flow” construction — spot clogs and confirm material is moving
- Easy-slide helix — rigid helix protects the hose and lets it slide over rough job-site surfaces
- “Cold-Flex” material — stays flexible even in sub-zero temperatures
- Oil-resistant and phthalate-free, made in the USA
Dust Collector 6″ Hose
- Diameter 6 inches
- Length 50 Foot
- Abrasion-resistant polyurethane — handles gritty concrete dust that destroys rubber/PVC hoses, for longer life and lower cost
- Transparent “see-the-flow” construction — spot clogs and confirm material is moving
- Easy-slide helix — rigid helix protects the hose and lets it slide over rough job-site surfaces
- “Cold-Flex” material — stays flexible even in sub-zero temperatures
- Oil-resistant and phthalate-free, made in the USA
Prep/Master Jr Tool Plate
- Built-in EG Quick Change groove — your EG quick-change tooling slides directly into the plate
- No separate metal adapter plate required — fewer parts, faster setup, lower cost
- Fast tool changes — slide tooling in and out
- Designed for the Prep/Master® Jr
STI Standard Tool Plate – Prep Master 28’s & 30’s
- Holds all STI tooling & diamonds
- Gives the flattest possible floor finish
- Standard tool plate for the 28 and 30 Prep Master Models
Dust Band — Full-Size Prep/Masters
- Seals the floating stainless steel shroud to the gearbox
- Keeps your dust containment tight for better dust collection
- The upper (tan) dust band
- Fits all full-size Prep/Master® grinders
Dust Skirt — Full-Size Prep/Masters
- Seals the floating shroud to the floor
- Keeps dust contained at floor level for better dust collection
- The lower (black) dust shroud/skirt
- Fits all full-size Prep/Master® grinders
Prep/Master Jr Replacement Weights — Set of 2
- Replacement weights for the Prep/Master® Jr grinder
- Sold as a set of 2
- 32 lbs each
- Direct replacements for your Jr’s original weights
- The correct part for your machine
Prep/Master Jr Replacement Dust Band
- Replacement dust band for the Prep/Master® Jr grinder
- Restores the dust seal around the grinding head
- Keeps dust contained for cleaner, healthier work
- The correct part for your Jr
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.