[EandM]

When using Hypo on render, how long is best to leave it before rinsing?

[Splash & dash]

Up to 45 muinits depending what you are trying to remove

[EandM]

Up to 45 muinits depending what you are trying to remove

Thank You.

It's just very heavy algae. It's killing 90% on the first pass but I'm getting streaks at the lower part of the walls where it seems to be drying before I rinse it.

[Rob.Hall]

 May be worth going on, general cleaning section.
More people there doing soft wash and pressure washing full time.
Await incoming from the pros on here 😁

[Smudger]

no need - splash has answered perfectly well here


any way you may be waiting several days for a reply on there 

Darran

[zesty]

Up to 45 muinits depending what you are trying to remove

Thank You.

It's just very heavy algae. It's killing 90% on the first pass but I'm getting streaks at the lower part of the walls where it seems to be drying before I rinse it.

Work from the bottom up when applying the mix, that way you don’t get missed areas nor streaks.

 If you work from top down, it’s fine, but it will sometimes mean that the mix neutralises and weakens as it runs down the render.

If you’re using a high powered, high flow machine, wirking top down is fine, but lower flow rates and a spray tip, do the opposite.

I’ve also had times where I haven’t rinsed at all. I had a job where the render was so incredibly bad in just a few spots, I did the job, then sprayed some mix on those bad areas, went home, customer emailed me saying it had completely gone and was absolutely amazed. Cab take a couple of hours to ‘bleach’ the black spot/black algae.

[EandM]

Thank you all very much.

[Splash & dash]

Up to 45 muinits depending what you are trying to remove

Thank You.

It's just very heavy algae. It's killing 90% on the first pass but I'm getting streaks at the lower part of the walls where it seems to be drying before I rinse it.

Two or three applications may be required, are you using a surfactant ?? This will help slow down it drying out 

[EandM]

Up to 45 muinits depending what you are trying to remove

Thank You.

It's just very heavy algae. It's killing 90% on the first pass but I'm getting streaks at the lower part of the walls where it seems to be drying before I rinse it.

Two or three applications may be required, are you using a surfactant ?? This will help slow down it drying out

Yes. 500 ml per 25 litres as directed.