Transformational A very impressive product which has transformed our Indian Sandstone terracing which is about 20 years old and was heavily marked with lichen. Deep rooted marks needed 3-4 further spot sprays particularly along the edges of stone.

Product and results excellent Product and results excellent; service first class.

Preseverer Arrived when promised, easy to apply on a yearly basis with an excellent result that lasts till the next annual application.

Does what is says on the tin!!!!!! Usually when someone says "it's too good to be true" you hesitate BUT this product actually DOES what is says on the tin!!! So far, I've only done one patch but the results are amazing!!!!!! It has restored the Onyx chipping to its original soft colour, can't wait for weather to improve so I can finish the whole garden!!! Then I'll use the Patio Black Spot Preventer. I have some lovely before and after photos!¡!

My black patio is now restored to the original stone My patio was very black and I don’t have a jet washer. I saw your product advertised in the RHS magazine and thought I would give it a try. I bought the small size to try it out as it is expensive. The result was fantastic within 15 minutes the black was disappearing. Having used that up I was off to the garden centre for more and although I am 84 years old I cleaned the whole patio in the afternoon. Spraying and then just washing off with the garden hose. Amazing product, very effective and easy to use if expensive but cheaper than employing someone to jet wash it.