# What Is a Micro-Topping? Concrete Overlay Basics

> Micro-topping is a thin 1/8 inch polymer-modified overlay. Used for fresh interior and exterior finishes over sound existing concrete.

URL: https://austinconcretefinishes.com/guide/what-is-a-micro-topping-and-where-used/
Last-Modified: 2026-06-25

![Micro-topping troweled at 1/8 inch over existing slab](/images/featured/microtopping-being-troweled-over-existing-slab-at-.webp)

## A skim coat for concrete

A micro-topping is a thin polymer-modified cementitious layer — typically 1/8 inch thick — troweled over existing concrete. It’s part of the 

Concrete Overlays & Micro-Toppings

[/concrete-overlays-micro-toppings/ →](/concrete-overlays-micro-toppings/)

 family and the lightest, fastest way to renew a surface.

![Smooth finished micro-topping](/images/content/smooth-finished-microtopping-interior-floor-modern.webp)

## Where it belongs

Best matches: interior floors needing a smooth modern look, patios and walkways needing a refined finish, surfaces being prepared for stain or polish, and renovations where existing tile or concrete needs to look new.

The thin profile means doorways and thresholds don’t get a big step. The smooth troweled finish accepts color, polish, and sealer beautifully. And the install is fast — 1-2 days for most residential projects.

Micro-toppings are less suited to high-impact surfaces or active structural movement. For those, a thicker self-leveling or polymer-modified overlay with crack bridging is the better call.

## Frequently Asked Questions

Is micro-topping durable? +

Yes, when bonded well. It's polymer-modified cementitious, hardens strong, and takes color or sealer.

Can I micro-top over tile? +

Yes with the right primer. We do this for kitchens and baths needing a modern concrete look without tile demo.

Will it crack? +

Bonded micro-topping over a stable slab usually doesn't crack on its own. It can mirror underlying slab cracks unless we add a bridging treatment.

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## Learn more about Concrete Overlays & Micro-Toppings

Thin micro-toppings and self-levelers for smooth, modern concrete finishes.

View Concrete Overlays & Micro-Toppings

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## Related Guides

### Micro-Topping vs Self-Leveling Overlay

Micro-toppings are 1/8 inch and follow the slab. Self-levelers are deeper and flatten unevenness. Here's when to use each.

[Micro-Topping vs Self-Leveling Overlay →](/guide/micro-topping-vs-self-leveling-overlay/)