Diamond tooling is the cheapest part of a coating job to get wrong and the most expensive to fix. Pick the wrong bond and you either burn through diamonds on a soft slab or polish a hard one without ever opening it. Here is how the crews we supply in Salem and across Southern Indiana make that call.
Read the slab before you pick the tool
Hard, dense, power troweled concrete needs a soft bond so the matrix wears away and keeps exposing fresh diamond. Soft or green concrete needs a hard bond, because the slab itself is abrasive enough to strip a soft bond in minutes. If you are not sure what you are standing on, test a small area in a corner and watch how fast the tooling loads up.
Match the grit to the job, not to habit
For coating prep you are not chasing a polish, you are chasing a profile. Coarse metal bond segments in the 16 to 30 grit range remove old epoxy, mastic, and weak surface paste and open the pores so the primer has something to grab. Finer grits belong on polishing work, not on prep. Running too fine on a coating job is one of the most common reasons a floor delaminates a year later.
Segment thickness decides how often you are buying tooling
Thicker segments simply last longer. The Lavina diamond tooling we stock uses 12mm segments, which is roughly 50 percent thicker than the standard segments most suppliers sell. On a big commercial slab that difference shows up as fewer tooling changes, fewer trips back to the truck, and a lower cost per square foot by the end of the job.
Do not forget the plate
Tooling only helps if it fits the machine you own. Converter plates let you run Lavina diamond tooling on grinders from other manufacturers, which means you are not locked into whatever your machine brand happens to stock. If you are running a mixed fleet, converter plates are usually the fastest way to standardize what your crew carries.
Check your scratch pattern before you coat
After the grind, look at the floor in raking light. You want an even, consistent scratch across the whole slab with no polished spots and no deep gouges. Polished spots mean the bond was too hard or your pressure was too light. Gouges mean the opposite. Fix the pattern before the primer goes down, because no coating system hides a bad prep job.
Get a straight answer before you order
Sullivan’s Tooling Supply is at 1776 E RC Morris Drive in Salem, Indiana, and we sell the same tooling we run on our own coating jobs. Call 812-995-5224, tell us what the slab looks like and what machine you are running, and we will tell you which diamonds to put on it. Most orders ship next day, and contractors from Scottsburg, Corydon, Paoli, Bedford, and Seymour pick up at the counter.
