---
title: "What Is Efflorescence? Pool Glossary | Marina Pool Services"
description: "Efflorescence is a white, powdery mineral deposit that seeps out of concrete, stone, or grout."
url: https://marinapool.multisites.ai/glossary/efflorescence
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Surfaces and decks

# Efflorescence

Efflorescence is a white, powdery mineral deposit that seeps out of concrete, stone, or grout.

Water moves through concrete and carries salts to the surface. When the water evaporates, the salts stay behind as a white crust. You may see it on decks, coping, and waterfeature stone.

It is usually cosmetic. But it also points to water moving through the material, so check for leaks, bad drainage, or failed joints. Brush off dry deposits and fix the water source. If it returns, look at the sealant and the drainage around the deck.

## Related terms

-   [Scale](https://marinapool.multisites.ai/glossary/scale)
-   [Pool deck](https://marinapool.multisites.ai/glossary/pool-deck)
-   [Expansion joint](https://marinapool.multisites.ai/glossary/expansion-joint)

## 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)