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Landscape Gardening

Can i seal indian sandstones still apparentwith some lichen

Have tried to remove lichen of slabs with bleach and power washer. I am too nervous to use the stronger swimming pool bleach. I have got a lot off but feel I am damaging the slabs now. If I seal over the lichen will this kill it or make it inactive? I do not want to seal in something that will cause more damage to my patio

1 Answer from a MyBuilder Landscape Gardener

I would strongly suggest you use Lithofin products and ask their advice, they have a helpline. You can't really damage the stone, discolour yes, but damage no, unless its really cheap and not suitable for paving. There are a lot of different sealants, so thats a hard question to answer. Test it first is the general rule. If you've got black spot you'll get it again, the paving is probably cheap and too porous, therefore holding water or laid too flat. Basically its too wet.


Answered 25th Jun 2018

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