Black Slab Issues


Last year we had laid black slabs and the landscaper used a sealant on them. Unfortunately this made them look very shiny and black but also lethal once it became wet. They now look very unsightly as I have tried unsuccessfully to pressure wash off the sealant.... Does anyone have an idea of a good solution to take off the sealant that is safe for the garden???


  • nutcutletnutcutlet Posts: 24,244

    Do you know what the sealant is Annie, is it just a shiny coat or is it coloured?

  • StillLearningStillLearning Posts: 180

    Hi Nutculet, its shiny unfortunately dont know its name

  • blackestblackest Posts: 623 that might help, basically grit blasting or a chemical stripper but it needs to be the right one and it may take a pro to do the job. 

  • StillLearningStillLearning Posts: 180

    Many thanks Blackest looks like I will have to gradually let it wear off as its indian black slate just hoped there was something out there I could paint on and then wash off that is garden friendly its such a large area that has been doneimage

  • To make it a bit less lethal, and speed up the process, have you tried putting sand down over the most used bits?  At least you'll have some grip when it's wet.

  • FairygirlFairygirl Posts: 19,749

    I know this might sound obvious Annie but have you asked the contractor what they used or if they can remove it? It seems a strange thing to do if it means they're treacherous to walk on. Maybe they thought you just wanted to sit and look at them from afar! image

    to walk through a forest is to touch the past

  • StillLearningStillLearning Posts: 180

    Hi it was the first time the landscaper had used the sealant apparently and unfortunately his company no more!! Fine sand seems a good idea and it may wear down the sealant image

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