How to Whiten Grimy Grout

Freshen up your tile without regrouting

If your tile grout is dirty and stained but still sound, consider whitening the grimy grout with colorant. It's an easy, inexpensive four-step process.

By the DIY experts of The Family Handyman Magazine


One day




$20 - $100

How it works

When cleaning isn't enough, the usual cure for grimy grout is to grind it out and regrout (see Tips for Removing Grout). But here's an easier approach: DAP Kwik Seal Grout Recolor Kit (available at home centers or online) lets you put a fresh coating over old grout in a few hours. It's a four-step process. First, you clean and prep the grout with DAP Pre-Treat. Next, apply the Color+Seal coating. Remove the excess and then buff off the haze. The kit contains everything you need and covers about 100 sq. ft. of 4-in. tile (smaller tile will have more grout lines and require more material). Learn more at

You'll need a sponge and rubber gloves.

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • DAP Kwik Seal Grout Recolor Kit

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