Microtopping is a thin cementitious overlay, typically 1/16 inch to 1/8 inch thick, applied over existing concrete to create a smooth new decorative wear surface without a full slab tear-out.
Understanding Microtopping as a Resurfacing Option
Microtopping is a polymer-modified cement product troweled, squeegeed, or sprayed on in thin lifts to resurface a worn, cracked, or unattractive slab. Because it’s applied so thin, it’s used to renew a floor’s look and function, not to correct significant structural damage or build up a slab’s elevation.
Microtopping vs. a Full Concrete Overlay
A standard concrete overlay is applied thicker (often 1/4 inch or more) and can be used to add slope, correct minor grade issues, or rebuild a more damaged surface. Microtopping is thinner and mainly cosmetic and functional. It’s the go-to choice when the existing slab is structurally sound but the surface itself needs a fresh, uniform finish before staining, sealing, or coating.
Surface Prep Requirements
Like any overlay, microtopping depends entirely on proper substrate prep: mechanical profiling (shot blasting or grinding) and a clean, contaminant-free surface. Skipping prep is the most common cause of microtopping delamination.
Where Microtopping Works Best
It’s a common choice for refreshing interior floors, countertops, and vertical surfaces ahead of a decorative concrete or stained finish, especially in renovation work where a full tear-out isn’t practical.
Also Called
Concrete Microtopping, Skim Coat
