---
title: "What Is Plaster? Pool Glossary | Marina Pool Services"
description: "Plaster is a mix of white cement and marble dust used as the smooth interior finish of many concrete pools."
url: https://marinapool.multisites.ai/glossary/plaster
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Surfaces and decks

# Plaster

Plaster is a mix of white cement and marble dust used as the smooth interior finish of many concrete pools.

Plaster is the classic pool finish. It is smooth but porous, so it reacts to the water. Low pH or low calcium can etch it, and high calcium can leave scale.

Signs of trouble: rough patches, stains, chalky spots, or hollow-sounding areas. Plaster often lasts many years, but life span depends on water balance and workmanship. Keeping your water balanced is the best way to protect it. Resurfacing is a separate trade, so ask a pool builder about it.

## Related terms

-   [Etching](https://marinapool.multisites.ai/glossary/etching)
-   [Scale](https://marinapool.multisites.ai/glossary/scale)
-   [Resurfacing](https://marinapool.multisites.ai/glossary/resurfacing)

## Need a hand with your pool?

Call or text and tell us what your pool needs. Estimates are free for qualifying services, and same-day estimates are possible when the schedule allows.

[Call (817) 896-1120](tel:+1-817-896-1120)[Get a quote](https://marinapool.multisites.ai/contact)

![A pool technician working on an equipment pad](https://marinapool.multisites.ai/_astro/technician-equipment-pad.BW5xZMNY_Zum1K5.webp)