I have cast stone paving at my front door (from Haddonstone many years ago) which has gone black. I will be getting it cleaned with a DOFF system, but wanted some advice about what I should seal it with afterwards? As it is a few years old it is quite porous, and I want to stop it going black again so quickly!
As you can see from the photo, I also need to repoint the slabs. Whilst Haddonstone etc sell a pointing mix consisting of crushed stone that is mixed with white cement, I don't find that this lasts very well. Please could I get some advice on other options?
While their architectural castings are wonderful, their paving products....well, let's just say they leave something to be desired!
Sealants are a nightmare subject - you can read much more about them here. I would be far more tempted to consider regular treatment with a good quality biocide for paving, such as Wet & Forget. These keep the paving clean-ish with none of the issues associated with sealants.
