Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

1527 posts

Uber Geek


# 214026 24-Apr-2017 14:52
Send private message

I'm nuking some green patches on our newish deck. I got some generic moss/mould/gunge cleaner from the number 1 red shed.

Anyway instructions say to spray and then hose off after 60 seconds. Last time I got the spray and walk away type.

Are there any downsides to leaving the stuff on for a while or until it rains?

I can't see any reason why you would spray it, leave for 60 seconds and then hose off. Especially since it was probably on the deck for 15 minutes by the time I had sprayed the entire deck.

Create new topic
34 posts


  # 1769806 24-Apr-2017 14:57
Send private message

I'm not and expert but I think its something like this.


The hose off after 60sec are generally a bleach based system (hypochlorite or similar) and would probably have corrosive effects on metal fittings if left longer the chlorine disappears fairly quickly.


The spray and walk away/wet and forget type products have a different active ingredient, its slower acting but probably less corrosive. 

1527 posts

Uber Geek


  # 1769820 24-Apr-2017 15:11
Send private message

Ah looks like you are right.


Critics of bleach-based cleaners say they badly damage wood fibres and give timber a washed-out (or bleached) look. It’s also corrosive to metal nails and screws. - See more at:


3200 posts

Uber Geek

  # 1769837 24-Apr-2017 15:31
Send private message

Get proper deck cleaner or use the spray and walk away stuff.

Always be yourself, unless you can be Batman, then always be the Batman


51 posts

Master Geek

  # 1771240 27-Apr-2017 13:41
Send private message


Critics of bleach-based cleaners say they badly damage wood fibres and give timber a washed-out (or bleached) look. It’s also corrosive to metal nails and screws. - See more at:



I recently used option 4 from this link to clean our fairly large deck that hadn't been cleaned for some time, if ever.  Purchased a tub of sodium percarbonate (active ingredient in 'Hit the Deck' and those 'oxy' laundry treatments) from Trademe for cheap.  Over the course of a few evenings I sprayed section by section, waited 30 minutes or so, scrubbed with a stiff broom and hosed off.  Possibly more effort than others, but it worked very well!

Create new topic

Twitter and LinkedIn »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

OPPO Showcases New CameraX Capabilities at Google Developer Days China 2019
Posted 15-Sep-2019 12:42

New Zealand PC Market returns to growth
Posted 15-Sep-2019 12:24

Home sensor charity director speaks about the preventable death which drives her to push for healthy homes
Posted 11-Sep-2019 08:46

Te ao Maori Minecraft world set to inspire Kiwi students
Posted 11-Sep-2019 08:43

Research reveals The Power of Games in New Zealand
Posted 11-Sep-2019 08:40

Ring Door View Cam now available in New Zealand
Posted 11-Sep-2019 08:38

Vodafone NZ to create X Squad
Posted 10-Sep-2019 10:25

Huawei nova 5T to be available 20th September
Posted 5-Sep-2019 11:55 launches prepay challenger brand Kogan Mobile in New Zealand
Posted 3-Sep-2019 11:42

Pagan Online available now
Posted 27-Aug-2019 20:22

Starship hopes new app will help combat antibiotic resistance challenges
Posted 27-Aug-2019 19:43

Intel expands 10th Gen Intel Core Mobile processor family
Posted 23-Aug-2019 10:22

Digital innovation drives new investment provider
Posted 23-Aug-2019 08:29

Catalyst Cloud becomes a Kubernetes Certified Service Provider (KCSP)
Posted 23-Aug-2019 08:21

New AI legaltech product launched in New Zealand
Posted 21-Aug-2019 17:01

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.