Simple to apply, wait 6-8 hours and rinse stains away, no scrubbing required | Its fast acting, powerful concentrated gel formula clings to tiles, silicone sealant (around windows, sinks and baths), shower-heads, Pool and more | As it is gel type, and so does not flow down in vertical and inclined surface, easy to use and clean up more effectively by acting for a longer time | Perfect for tiles: from black to brand new and extra clean with pure white caulk | Give it a try before striping the caulk off and redo it.

Skylarlife Home Grout Stain and Sealant Stain Whitener for Tiles Grout Sealant Bath Sinks Showers | Tiles | Grout | Sealant | Sinks