How to Wash a Waterproof Mattress Protector Correctly

By Adjustable Pillows & Quality Sleep Products | Coop Sleep Goods | Published: 2026-10-17

Category: How-to Guides

Learn the right way to clean your waterproof mattress protector without damaging the waterproof layer. Step-by-step washing and drying tips included.

Quick answer

Wash your waterproof mattress protector in cold or warm water on a gentle cycle using a mild liquid detergent. Never use bleach, fabric softener, or high heat drying, as these degrade the waterproof backing. Air dry or tumble dry on low until just dry.

Why proper washing matters

A waterproof mattress protector is a thin but critical layer that shields your mattress from spills, sweat, dust mites, and bacteria. Its waterproof backing is usually a polyurethane (PU) film or a similar membrane that can crack, peel, or lose its seal if washed aggressively. Many people ruin their protector in the first few washes by using hot water, harsh detergents, or high heat drying. With the right routine, you can keep it working effectively for years.

How often should you wash it?

Wash your waterproof mattress protector every 1 to 2 months, or more often if you have allergies, pets, or young children. A quick spot clean between washes is fine for small stains. Over-washing can accelerate wear, so stick to a regular schedule rather than washing after every use.

Step-by-step washing guide

1. Pre-treat stains (if needed): Apply a small amount of mild liquid detergent directly to any visible stains. Gently rub with your fingers or a soft brush. Do not use bleach or stain removers with enzymes—they can eat through the waterproof layer. Checkpoint: If the stain is old, let the detergent sit for 10–15 minutes before washing.
2. Choose the right water temperature and cycle: Set your machine to cold or warm water (never hot) and select the gentle or delicate cycle. Hot water can melt or warp the PU backing. A gentle cycle reduces friction that can cause the waterproof film to peel. Mistake to avoid: Using hot water or a heavy-duty cycle will shorten the protector's lifespan.
3. Use the correct detergent: Pour in a mild liquid detergent. Avoid powdered detergents (they can leave residue that clogs the fabric) and never add fabric softener or bleach. Fabric softener coats the waterproof membrane and reduces its effectiveness. Checkpoint: If you must use a detergent with additives, choose one labeled "free and clear."
4. Dry properly: Tumble dry on low heat or air dry. High heat will damage the waterproof backing. If using a dryer, remove the protector while it is still slightly damp and let it finish air drying. Do not iron. Mistake to avoid: Drying on high heat is the #1 cause of cracked or peeling waterproof layers.

Products that make care easier

The Ultra-Cool Waterproof Mattress Protector: The Ultra-Cool Waterproof Mattress Protector uses a polyethylene & polyester blend in a cooling jacquard weave with a PU waterproof backing. The cooling fabric and silent construction mean you can wash it without worrying about crunchy or noisy layers, and the PU backing holds up well to gentle cycles.
Ultra Tech Waterproof Mattress Protector: Ultra Tech Waterproof Mattress Protector features a super-breathable Lulltra fabric (60% polyester, 40% bamboo-derived viscose rayon) with a waterproof-yet-soft 100% polyurethane backing. The bamboo-rayon blend resists pilling and stays soft after repeated washes, and the polyurethane backing is designed to remain flexible and waterproof when cared for properly.