Black spot slate

tench0771 · Apr 8, 2021

Got a job come up but there is black spot so needs hypo will the slate be ok with runoff

Pjj · Apr 8, 2021

Yes but if there is any iron in the slate it will go rusty and need treating with the stuff that you put on lead to return it to grey .

tench0771 · Apr 8, 2021

Ive got some led x pro was guna keep the hose on the area were runoff was at the front it has got rust on most of the stats wandering if its been hyped before

scottish cleaning service · Apr 8, 2021

tench0771 said:
Got a job come up but there is black spot so needs hypo will the slate be ok with runoff

View attachment 24112

If there wasn't that much then I would cut up some rags and dip in neat hypo and leave on the spots the night before then PW as usual the next day.

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Black spot slate

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