The 240 grit Dyma-Sert is the finishing end of the EDCO diamond tooling line. Where a coarse segment is there to take material off, this one is there to leave a surface you can hand off: smoothing trowel marks, refining terrazzo, cleaning up after a coarser pass, and pulling thin coatings without gouging the slab underneath. Contractors running EDCO grinders reach for it when the removal is done and the finish is what is being judged.
Built for
- Concrete polishing crews stepping up through grits toward a finished floor.
- Surface prep contractors removing urethane or epoxy thin coats before recoating.
- Terrazzo restoration where the goal is refinement rather than heavy removal.
- Slab repair work smoothing rough spots, trowel marks, and minor surface damage.
- Rental fleets and shops that want tooling with a long service life per segment.
Diamond segments versus grinding stones
Dyma-Serts are diamond segments welded to a backing plate, and the performance gap against conventional grinding stones is the reason most production crews switch. EDCO rates them at five times the grinding speed of stones with longer life, up to roughly 30,000 square feet of grinding action on standard 3,500 PSI concrete. Contractors comparing the two in the field describe it the same way: stones are inexpensive per piece and fine for occasional work, but a garage-sized slab that takes most of a day with stones is a fraction of that with diamonds. The higher cost per segment is offset by the hours you are not standing behind the machine.
One point experienced operators raise that catches newcomers out: diamond tooling is not one size fits all. The harder the concrete, the softer the bond you want, so the matrix wears away fast enough to keep exposing fresh diamond. On soft or green concrete the opposite is true. If you are getting poor cut on a hard slab, the segment is usually glazing rather than failing, and the answer is a different bond rather than more downforce.
Grit selection
Coarse grits handle heavy coating removal and aggressive leveling. At 240 grit you are in refinement territory: removing the scratch pattern left by a coarser pass, taking down surface imperfections from epoxy mortars, and lifting thin mastics and thin-sets without tearing into the slab. Most polishing sequences run several grits in order rather than jumping straight to a fine segment.
Specifications
- Manufacturer: EDCO
- Part number: 19290
- Grit: 240
- Type: diamond segments welded to a backing plate
- Rated life: up to approximately 30,000 sq ft on standard 3,500 PSI concrete
- Grinds approximately five times faster than conventional grinding stones
- Suitable for wet or dry grinding
Frequently asked questions
What is 240 grit Dyma-Sert used for?
It is a finishing grit. It smooths rough surfaces and trowel marks, grinds terrazzo, levels high spots, and removes urethane or epoxy thin coats, thin mastics, and thin-sets.
Can I use it wet or dry?
Both. Dyma-Serts are rated for wet or dry grinding.
How long does a Dyma-Sert last?
EDCO rates them at up to approximately 30,000 square feet of grinding action on standard 3,500 PSI concrete, which is significantly longer than conventional grinding stones.
How much faster are these than grinding stones?
EDCO rates Dyma-Serts at about five times the grinding speed of stones, and contractors comparing the two in the field report a similar order of difference.
Why is my segment not cutting on hard concrete?
On very hard slabs a segment can glaze over rather than wear. The usual fix is a softer bond that erodes fast enough to keep exposing fresh diamond, not more downforce.
Discount Cleaning Products is an authorized dealer for the brands we carry, and our US-based team works with these lines every day. If you are not sure which option matches your equipment or your job, contact us before you order and we will help you get the right one the first time.