10 Best Grout Whiteners

The Unibond Grout Reviver Pen is a convenient and user-friendly option for brightening faded or discoloured grout in bathrooms and kitchens. Its pen-shaped design allows for easy, precise application directly onto grout lines, which is great if you want a neat finish without a mess. It works well on common surfaces like ceramic tiles, stainless steel, and stone, making it versatile for different home areas. The formula dries waterproof within about an hour, so you can use your shower or sink soon after applying it.

Additionally, it has a triple-action mould resistance feature that helps prevent mould from returning, a useful benefit in damp environments. Since the product is a liquid pen with a small 7ml size per unit, it may require multiple pens for larger projects — although this pack includes three units, which is helpful. The whitening results last reasonably well, but like many surface treatments, it may need reapplication over time depending on usage and cleaning habits. It’s also synthetic-based, so if you prefer fully natural products, this might be a consideration.

With a solid customer rating of 4.1 stars and top rankings in tile grout and bathroom accessories, this pen is well-regarded for quick grout refreshes without professional help. For those seeking an easy and affordable way to improve grout appearance and reduce mould risks, especially in small to medium areas, this product fits the bill nicely.

The Twin Pack White Grout Pen by Rainbow Chalk Markers Ltd. is designed specifically for restoring and whitening tile grout in kitchens and bathrooms. It's a silicone-based product that asserts compatibility with a range of grout types and aims to cover up to 120 meters of 2mm grout lines with its two pens. This makes it suitable for both floors and walls, addressing typical problem areas in household environments.

The pens are convenient for small or medium-sized home projects, offering an ease of application akin to using a marker — this straightforward approach is one of its stronger points. Additionally, this product includes anti-bacterial agents to help prevent the reappearance of mold, which can be particularly beneficial in damp areas like bathrooms.

The longevity of the results may vary depending on the frequency of cleaning and exposure to moisture, which could require more frequent reapplication compared to some more permanent solutions. While the ease of application is a plus, it might be less effective on very old or heavily discolored grout lines, requiring more effort for a polished finish. It appears to be a reliable choice for those looking to quickly refresh the look of their grout.

The ISPAR Tile Grout Reviver is a paste designed to refresh and repair grout lines, especially in kitchens, bathrooms, and floors. It comes ready to use with a spatula and sponge, making application straightforward even for beginners. Its waterproof formula suits ceramic tiles, and the black color option helps restore dark grout effectively. The product dries quickly, which can speed up your renovation or cleaning project.

This grout reviver works well at covering and renewing grout, though the longevity of results can vary depending on the area's moisture and wear. Since it is formulated in a specific grout color (black), it may not be suitable if you want to whiten or brighten grout lines originally light-colored.

If you want an easy-to-apply grout restorer mainly for black or dark grout on ceramic tiles, ISPAR offers a practical and effective solution. It works best on compatible surfaces and colors and is not a universal grout whitener.