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Why You Shouldn’t Use Boiling Water on Natural Stone Floors

Boiling water might seem like the ultimate cleaning shortcut — it’s hot, it steams, it dissolves grease — but it’s not safe for stone. Here’s why


1. Thermal Shock Can Crack or Damage the Stone

Natural stone (especially marble, granite, limestone, and travertine) is porous and sensitive to temperature changes. Pouring or mopping with boiling water can create a sudden temperature shock, which may cause:

  • Cracks

  • Splits

  • Surface flaking

  • Loosening of sealant or grout

Especially in colder climates or cooler rooms (like bathrooms), this rapid heat change is risky.


2. Boiling Water Can Break Down Sealants

Most natural stone floors are sealed to protect them from moisture and stains. High heat can melt, weaken, or lift that sealant, leaving the stone unprotected and more likely to stain or absorb dirt.

What to Use Instead:

  • Warm (not hot) water

  • SHYN Positive Chi Disinfectant in your mop bucket

  • 6 sprays of undiluted SHYN Degreaser in your mop bucket

  • Microfibre Mop or Wall & Floor Tool for safe, even application


The SHYN Rule:

If you wouldn’t touch it with your bare hand, don’t put it on your stone.

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