Seamly Seam Spray — Mildew Stain Spray for Shower Silicone & Washer Seals

✓ Free US shipping   ✓ 30-day money-back guarantee   ✓ Buy 2, save 20% (applied automatically)

The black line in your shower silicone isn't dirt. It's a stain, and scrubbing won't lift it.

Spray it on the seam, leave it 3-5 minutes, wipe once. No scrubbing, no old toothbrush, no re-caulking.

Why the bottle is small

You only spray the seam line, not the whole wall, so a little goes a long way. One 60 ml bottle covers a typical shower or tub seam. Most people take 2: one for the shower, one for the washing machine door seal. With 2, each bottle works out to $20.

Cheaper and faster than re-caulking

Re-caulking means scraping out the old bead, buying a new tube and waiting a day before you can shower. Seamly takes about 5 minutes and you can shower the same day.

30-day money-back guarantee

If Seamly doesn't lift the black staining from your silicone or rubber seals, contact us within 30 days of delivery and we'll refund your order. You don't need to send the bottle back.

Where to use it

• Shower and bath silicone seams and caulk lines
• Washing machine door rubber seals
• Window and door frame seals
• Bathroom glass and tub-edge sealant

How to use

1. Shake the bottle gently.
2. Spray directly onto the stained seam.
3. Leave it 3-5 minutes. Heavier staining needs longer.
4. Wipe away with a cloth or paper towel. Repeat on stubborn marks.

What's in it

A high-concentration active chlorine formula, as stated by the manufacturer. 60 ml (2.04 fl oz). PE trigger-spray bottle, 3.5 x 14 cm.

Safety: use in a ventilated space, avoid skin contact, keep off coloured fabrics, and keep out of reach of children.

Shipping

Free shipping on every US order. Ships from our US warehouse: packed in 1-3 business days, arrives in roughly 4-11 business days.

FAQs

Will it remove the black line completely?
On silicone and rubber seals most of the black staining lifts on the first application. Deep, long-standing marks may need a second pass.

What if it doesn't work on my shower?
Contact us within 30 days of delivery and we'll refund you. No need to return the bottle.

Do I need to scrub?
No. Spray the seam, wait, wipe.

Does it work on grout?
No. Seamly is made for silicone and rubber seals: shower caulk lines, washing machine door gaskets, window and door seals. Porous cement grout is not what it's for.

How long do I leave it on?
Around 3-5 minutes. Heavier staining takes longer.

Is it safe on coloured surfaces?
Keep it off coloured fabrics, and test a small hidden area first if you're unsure. Use in a ventilated space and avoid skin contact.

How do I get the 20% off?
Add 2 or more bottles to your cart. The discount is applied automatically at checkout, no code needed.