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Thanks for replying Will. I'm a bit more enviromentally aware for bleach though ;-)
16 l per minute!
Official blackspot removing products are cagy about their ingredients.
Kranzles are the business - we have a Kranzle 11/140 tst and it is really comfortable to use all day with unbelievable cleaning power: http://www.kranzle.co.uk/english/17.htm
From memory I think it is the most powerful model that can run from a standad 13amp socket.
Pav clean by Black Jack Surface Technology, for a 20l drum is £25, and this is the only product I've found to 100% remove black spots on any surface, this product is so good that I've cleaned many patios and sometimes haven't even had to use the jet wash.👌
Thanks Sam, as Will says it's 15% Sodium hypochlorite so still not great for the environment. My own patio is black Limestone, if I were to put this stuff on it I think it would disolve!
No probs, I've never had an issue with it on sandstone and concrete, but then I've never come across limestone with black spots either, usually limestone cleans one of the easiest with a jet wash.
Does this only clear black spot or will it also clean the slimy green mould
Interesting read...picking up a Titan jetwash today, heard there very good and comparable to the karcher but much cheaper
Let us know how you get on with it Stephen. I have a few bits of kit which are titan. I wouldn't want to use them everyday but for tools which only have occasional use they are fine. Apart from the 9" grinder, the guard is next to useless & constanly spins around because of poor design on the locking system.
Titan breakers are good. Your grinder, does it have like a flip over latch for the guard? If so, I had one like that on worx grinder, I had for 15years. Open the latch pinch the bolt up a little if the latch won't close, knock it in with the handle of a club hammer.