Slate sets - Cement stain removal

[kenny s]

Hi
I have just got a job of removing cement stains from slate sets which is a straight forward job, but the problem i have is that i can't use an acid cleaner on the cement as it drains into a river, has anyone got any advice on my best approach to this?

[cookiewales]

if its not caked on you can use wd40 or 3inone oil which will remove the cement dust look elbow grease will help first plus high preasure jet then oil to finish which is normal practice for slate and clay tiles after slurry pointing a bit of acid o rag would work then mop up dont forget your gloves and mask good luck cookie

[cookiewales]

ps finish of with oil

[Tony McC]

There are some non-acidic cement cleaners, but they are pricey and probably just as environmentally risky. Steam cleaning can help with light cementitious staining, but heavier stains may need to be sand-blasted.

[kenny s]

Thanks for the advice, will give it a go.