Black streaks on gutters

[MarkSk1]

Whats the best chemical to remove black streaks on home rain gutters? Thanks

 

[Mikespowrwash]

I have never used it but they say gutterzap from exterior is the best for that or krud kutter from home depot. I use a sodium hydroxide based product from my local distributor that takes em right off and leaves the gutter looking new or as close as possible to new. Always test the strength , too strong of a mix will dissolve the finish right off the gutter. You usually have to brush them to get them clean.

 

[Aplus]

Use the search function and I think you will find all the info on this subject that you need, as it's been discussed many times.

If after that you still need help, come on back!

 

[peevo74]

Gutter zap is what i use.The customers love the results and its always a few extra $'s in your pocket.Mix it up and apply it with a brush on a pole right from the ground wait a minute or two and rinse,dont let it sit to long or it will take off to much paint.Thats how it works it strips a layer of paint off.two thumbs up in my opion.