SmartsealGrout Magic - Black 1 x 237ml. an Amazing Grout Restorer That Makes Old Grout Like New. Permanently Seals The Grout to Help Protect Against Mould, Mildew and staining for up to 15 Years.

Great coverage. Need to clean lines to remove grease and dirt from surface and ensure it's very dry before application.I used a solvent.Initial drying takes 10-20 minutes and then you need to clean surrounding tile (just rub over the top of the tile and grout) using a damp cloth. If you leave too long, non adhesive pads work well.After cleaning, leave for a day to set for heavy floor use and it lasts. A second coat can be applied, but coverage is amazing. I used black and finally have true black grout lines.Goes a very long way.. One bottle=one large bathroom if careful. I applied using an art paint brush.Also seals well from water and stains.

Magic , maybe re-name it , like hit and miss . I've got a small bathroom, I had to go over it 3/4 times some area's it was OK and alot wiped off , it was hard work . I tried 15 minutes, then 20 minutes, then 30 minutes it's hit and miss . The ytube videos look so simple and easy to do , trust me it's not , maybe the ytubers have shares in this . Or maybe it's just me ,

Haven't finished job as its quite a laborious task, but tiles are looking refreshed

Very good product and easy to apply with a fin brush- just wished it came in smaller bottle.just did a full shower cubicle and used about 50ml.

The product absolutely works and you can get a good finish, but how it comes out is completely down to your preparation, method, and how good the grout has been done in the first place.Firstly, you need to clean the grout thoroughly, if there's any grease on the kitchen grout or slime on the bathroom grout then it will not penetrate and will come off when you rub off the excess. As someone else in the reviews has said, a wire brush (I used a firm toothbrush) is a good idea, a scourer at least.Secondly, the instructions say that you can remove the excess immediately but I haven't found that to be the case. It needs a good 45 minutes to an hour to soak into the grout, and at least two coats.Lastly, and this likely only relates to darker colours; if your grout is poorly done (as mine was) then making the colour darker show up the poor workmanship. Excess grout on the tiles will show way more and uneven tiles will become more apparent. If you're doing white on white then you should be fine.A decent product, but needs to come with MUCH better instructions and support - a guide video would do the trick.