Sodium percarbonate + black soap: the formidable duo for cleaning ceramic tile grout

Tile grout is one of the most thankless areas of the house: exposed to humidity, soap, mold, and limescale, it goes from sparkling white to questionable gray in the blink of an eye. However, there's no need for harsh chemicals or suffocating chlorine: nature has already provided everything.

Today, we're sharing a 100% natural and ultra-effective recipe based on sodium percarbonate and camelina black soap to revive your grout — and your shower!

Why this duo works so well

Sodium percarbonate is a magical white powder that releases active oxygen when it comes into contact with hot water. The result:

• It whitewashes dull grout,

• It deep cleans,

• And it dissolves organic stains (mold, soap, grease, etc.).

Black soap, on the other hand, is an ancient cleaner made from vegetable oils. It is made from local camelina, a Quebec plant known for its gentleness and natural degreasing power.
→ It dissolves grease and soap residue,
→ Nourishes surfaces without damaging them,
→ And adds shine while respecting the environment.

Together, these two ingredients form a winning combination: black soap cleans and loosens, while percarbonate whitens and disinfects.

The express DIY recipe for ceramic grout

Ingredients:

• 2 tbsp sodium percarbonate

• 2 tbsp black soap

• ½ cup hot water (not boiling)

Preparation:

1. Pour the black soap and percarbonate into a small bowl.

2. Gradually add the hot water, mixing until you get a creamy paste.

3. Let it rest for a minute: the mixture will gently activate.

Application:

1. Using a grout brush (or an old toothbrush), apply the paste to the damp grout.

2. Gently scrub in circular motions.

3. Leave on for 10 to 15 minutes.

4. Rinse with clear water, then admire the result

Pro tips

• For very dirty grout, add a few drops of tea tree essential oil (

• Never mix percarbonate with vinegar: they cancel each other out.

• If your grout is colored, do a small test before applying everywhere.

Result: clean, healthy and chemical-free scent

After this treatment, the grout regains its original color, the surface is naturally disinfected, and the entire bathroom smells clean... naturally.

Why adopt this method

✅ 100% biodegradable
✅ Chlorine and ammonia-free
✅ Safe for septic tanks
✅ Economical and local
✅ And most importantly: it works!