Rapid Application: Moss & Algae Remover

Tired of scrubbing away at moss, mould, and lichen? Our Rapid Application Moss, Mould, Lichen & Algae Remover does the hard work for you. This powerful, bleach-free formula cleans outdoor surfaces quickly and easily, with no scrubbing or pressure washing needed.

The Best Moss, Mould & Lichen Outdoor Cleaner On The Market

No need to drag out boring chores any longer than they need to be thanks to Rapid Application. It’s designed with a revolutionary Reach Nozzle which covers up to 100m² in just five minutes, whilst dispensing the product fifty times faster than your average garden sprayer.

It’s the full outdoor cleaning crew you need, all in one bottle. All you need to do is apply the cleaner walk away, Mother Nature takes care of the rest. Rain and wind activate the magic, breaking down the contaminated grime and washing it away, bit by bit until your surfaces are clean.

Tackles ALL Outdoor Surfaces

Boost your curb appeal with this all-in-one concentrate. It easily tackles grimy green stuff on your roof, paving, lawn, solar panels, camper, tennis court…you name it!

Fast and Effective: Revolutionary Reach Nozzle covers up to 100m² in just 5 minutes, 50x faster than standard sprayers.
Versatile: Tackles grime on roofs, paving, lawns, solar panels, campers, tennis courts, and more.
Easy to Use: Simply attach to your hose and spray. No mixing, no mess.
Long-Lasting Protection: One application prevents regrowth for up to a year.
Safe Formula: Biodegradable, non-caustic, and safe for plants and pets.

How does Rapid Application Moss, Mould, Lichen & Algae Remover work?

Tired of battling moss, mould and algae? Let this powerful formula do it for you. Its biodegradable surfactants effectively remove unwanted growth from any outdoor surface, while its non-caustic, non-acidic nature ensures it’s safe for your plants and pets. Simply attach your hose and begin spraying. No ladders, no scrubbing, no bleach and no aggressive water blasting.

Transform Your Outdoor Spaces Today

Rapid Application Moss, Mould, Lichen & Algae Remover is the fastest, easiest way to restore your outdoor surfaces to their natural beauty. Order yours today and see the difference!

Easy Hose Applicator

Our easy-to-use Reach Nozzle makes cleaning a breeze. Simply attach your hose, choose your setting, and spray! The flat fan is perfect for up-close cleaning, while the jet setting tackles those hard-to-reach spots up high. No ladders, no hassle - just effortless cleaning.

No mixing or mess, the sprayer automatically regulates the dilution rate for you.

Heads Up: While you might see some instant results (like moss turning brown), Wet & Forget truly works its magic over time. One application not only removes existing growth but also provides long-lasting protection against new moss, mould, and lichen for up to a year. So, sit back, relax, and let Wet & Forget do the hard work for you.

IMPORTANT: You can't use regular Wet & Forget 5L (blue) with the Rapid Application hose fitting. It will NOT work as dilution rates are very different!!

Double Bubble: House Wash

House proud but your exteriors are letting you down? You need our Double Bubble House Shampoo. Like a spa day for your home, this clever cleaner dissolves dirt and grime in just one spray, leaving your walls looking as good as new.

Boost Your Curb Appeal with Our House Wash

We get it. Keeping on top of your house maintenance is a hassle, not to mention expensive. Double Bubble House Wash isn’t just about a quick clean, it’s an investment in the longevity of your home. This powerful formula protects paintwork and weatherboards from pesky pollutants that can cause premature ageing and fading. This means less frequent repainting and maintenance, saving you precious time and money. A real win-win!

Heads Up: Double Bubble is designed to tackle dirt and grime, not moss and mould which require Wet & Forget or Rapid Application.

How does Double Bubble House Wash work?

Our specialised formula utilises powerful surfactants to effortlessly dissolve dirt, grime, and other unsightly contaminants. With light agitation, these stubborn blemishes are lifted away, leaving your surfaces refreshed and revitalised.

Double Bubble goes beyond a simple clean. By slowing the accumulation of airborne pollutants, it helps extend the appearance of your home’s exterior. In fact, by preventing oxidation and other damage, our house shampoo could potentially double the lifespan of your paint. So, spending a couple of hours a year washing your house is a small price to pay for a home that looks its best for years to come.

We recommend using Double Bubble when you first notice a build-up of dirt and grime. Thanks to its effortless application and powerful formula, keeping your home looking its best is a breeze, not a chore.

Easy Hose Applicator

Our easy-to-use Reach Nozzle simplifies the cleaning process. Simply attach your hose, adjust the nozzle to the ‘water’ setting and find your desired pressure. Then switch to ‘ON’ to mix the formula with the water stream. Use the flat fan for close-up cleaning and ‘Jet’ to tackle those hard-to-reach spots up to 8 metres high. A light scrub with our extendable house brush and a final rinse with water will leave your home in tip-top shape.

Double Bubble House Wash Jet Instructions

Double Bubble House Wash FAQ

Window Witch: Exterior Glass Cleaner

Tired of struggling with streaks and smears? Window Witch is the revolutionary, streak-free glass cleaner that will leave your windows so clear, you'll think they've disappeared! Our powerful formula effortlessly dissolves grime, and fingerprints, leaving your windows and conservatories crystal clear and preventing water spots in future.

Say Goodbye To The Squeegee and Streaks with Our Exterior Glass Cleaner

Let’s be honest, cleaning windows is a pain! But fear not, Window Witch is here to give you windows so streak-free that you’ll think they’ve disappeared. This powerful formula tackles grime and those pesky fingerprints leaving your windows and conservatories crystal clear. Our concentrate is free of harsh chemicals and comes with a hose nozzle that makes cleaning a breeze.

How does Window Witch work its magic?

It's all thanks to a clever blend of sugar-based surfactants that dissolve grime like nobody's business! Citrate water softeners and a high-performance sheeting agent team up to ensure a streak-free, spotless finish.

Reach new heights, with our handy sprayer, you can reach up to 8 metres (two storeys high!) without needing a ladder. The easy-to-use Reach Nozzle attaches to your garden hose and offers adjustable settings for targeted cleaning. Cover up to 600m² of glass with just one 2-litre bottle!

Just connect your garden hose, turn the nozzle, and let the cleaning sorcery begin - no squeegee in sight!

Easy Hose Applicator

No mixing or mess, the hose nozzle automatically regulates the dilution rate for you.

Heads Up: Window Witch is not designed to remove hard water spots. If you have white residue or streaking when the windows dry, the product hasn’t been washed off properly, repeat the rinsing process.

Experience the Window Witch difference today and say goodbye to streaks and squeegees forever!

Coverage is up to 600m²

Window Witch - FAQs

FAQs and Guides

Why is Wet & Forget’s Rapid Application is better than other outdoor cleaners?

Compared to traditional cleaners packed with chemicals, Wet & Forget’s Rapid Application is an almost neutral solution that won't damage your surface when it's applied. Plus, not having to hose it down after application, reduces your water costs and minimises the time you take to clean. With a focus on convenience, ease of use and safer ingredients, Wet & Forget has become the leading outdoor cleaner. Although results can take time on the first clean up - it's well worth the wait.

How do I know if Wet & Forget’s Rapid Application is working?

In some circumstances, you may see an instant reaction take place. For instance, when getting rid of moss, you will probably see it go brown straight away. Surfaces such as concrete may turn an orange-brown colour after it has been sprayed. This temporary change is a good sign as this is a natural reaction between the growth and the Wet & Forget’s Rapid Application solution.

How often should I apply apply Wet & Forget’s Rapid Application?

Good news. After the initial clean, you should not have to wait to see results. Instead, an annual spray of Wet & Forget’s Rapid Application should keep the moss, lichen, algae and mould away. However, if any new growth appears reapply sooner and keep it at bay.

How Do I use Rapid Application?

Connect the Rapid Application Reach Nozzle to your hose.
There is nothing like this Reach Nozzle on the planet!
This revolutionary and fast Reach Nozzle reaches 8m (2 storeys high).
There’s no mess and no mixing!Turn dial to “Water” and turn tap on until you are happy with the pressure.
Rotate black dial on the Reach Nozzle to the ‘ON’ setting
Begin spraying in a logical pattern to ensure a thorough coverage of the surface.
Your job is done. Watch the surface come clean bit by bit, with the help of Mother Nature.

Using Rapid Application is So Easy with the 8m Reach Nozzle

Will Rapid Application affect my pets?

Not under normal circumstances, but normal safety precautions prevail. Keep your precious pets off the surfaces until the surface is TOTALLY DRY. This prevents the cute little critters licking product off their fur or paws. We say "Don't let your moggy or Doggy's paws get soggy! If they accidentally walk or sit in the product - wash their feet and bottoms with fresh water as a precaution.

If I am on tank water, can I use Rapid Application on my roof?

Sure can. But you must disconnect the water supply to your water tank for 3-4 weeks or have at least 36mm of rain to remove the concentrate from your water tank. Wet and Forget's Rapid Application has been used for over 35 years to treat biological growth on roofs and you don't want the decomposing debris to get into your tank water.

What time of the year do you apply Wet & Forget’s ‘Rapid Application’?

There is no definitive time - but of course all these growths such as lichen, moss, mould and algae appear more in the winter months when the exterior surfaces are damp and wet which are the perfect conditions for these growths to thrive. The best time to apply Wet & Forget’s ‘Rapid Application’ is when you see the first signs of green. Always apply to a DRY surface so you do need to wait for that right day. If you can stop it at the green stage, then the cleaning is so much quicker than when the surface is black - which is a sure sign that the contamination has been there for a much longer time. Be proactive and get rid of it at the first visible sign.

Do you need to rinse off Wet & Forget’s ‘Rapid Application’?

NO. Apply Rapid Application to a dry surface and then just leave it. Mother Nature takes over as the contamination breaks down and the weathering process takes it away gently, bit by bit until the surface is clean. If you rinse - you will dilute the product and the results will not be as expected.

Is Wet & Forget’s ‘Rapid Application’ a bleach?

Absolutely not!

What is the difference between Rapid Application and Wet and Forget?

They are 'sister' products. The ingredients and coverage are the same but the dilution rates are different because the way you apply them is different. Wet and Forget needs a garden sprayer while Rapid Application needs just a hose to apply.

Rapid Application and Wet and Forget give you the same coverage

Do I have to use Rapid Application all at once?

No, but good planning is essential. Work to a pattern so you know where you have started and stopped. The product is fine if left in the spray container as it does not deteriorate when it has been diluted.

How long will Rapid Application last in the container?

Rapid Application has unlimited shelf life. Always keep the container out of reach of children.

How long does it take Rapid Application to work?

It is totally dependent on the intensity of the contamination. If it is really light you will see results within days. Otherwise it may take approximately 2-3 months to see improvements. Your concrete may turn an orangy brown when the Rapid Application is applied. This is normal and shows you have had a good reaction. The discoloration will dissipate over a short period of time and is not permanent. The good news is that when you use it again the following season, the clean up will occur within weeks. In the very worst case scenario where contamination is extreme, it may take 6-12months.

What is the coverage area of Rapid Application?

Every 2L pack covers between 100-300m²depending on the porosity of the surface and the level of contamination. ie painted surfaces will use less product but porous surfaces readily absorb the product and therefore coverage could be in the range of 100-150m².

When is the best time to apply Rapid Application?

On a cool, dry windless day and when no rain is expected for 4-6 hours. Often the evening is best when evaporation of the product is minimal. This will ensure that the surface to be treated stays wet with Rapid Application for an extended period.

Will Rapid Application damage my plants?

Not unless you are directly spraying it onto the plants. If you accidentally do this, then rinse the plants down with water from the hose. Or better still, protect them with paper or plastic to avoid overspray.

Will Rapid Application remove the mould off my timber decks?

Most definitely! But if your deck is older and has never been cleaned, it may be noticeably blackened with the contamination. In this case, it would be advantageous to wait a month after the application of Rapid Application and give the area a light brush with a broom or scrubbing brush with warm water to remove it. The good news is that you should only have to do this once and then the maintenance becomes so easy. Also check out our other product, Hit The Deck, for a more instant result (although it does involve more elbow grease!)

Will Rapid Application get moss out of lawns?

You will need to use the classic Wet and Forget as the dilution rates are different. Firstly lightly water the lawn but not enough to saturate the moss. Do this late in the day when the sun is low so that evaporation is kept to a minimum. Dilute the 5L Wet & Forget 7 parts water to 1 part Wet & Forget and spot spray the moss. You may have to give it a couple of goes until you have it under control. At worst you may get slight burning on the grass but it will recover very quickly. Rake the dead moss out. then sprinkle lime over the area as this is usually a sign that your pH of the soil is not quite right.

How much Rapid Application will I need to clean my roof?

The average 3 bedroom tile roof is approx 150m² but because of the undulations of the tile profile the actual area is a lot bigger. Therefore an average tile/concrete roof would require 2 x 2L packs, depending on how porous the surface is and how much biological growth is present. For an average 3 bedroom tile roof with lichen you would require 3 x 2L packs depending on the total area if it is covered with lichen. For best results, spot spray the lichen, leave for 10-15 minutes and then respray the lichen and the entire roof to ensure the plant absorbs the Rapid Application thoroughly. The first application is to dissolve the waxy surface. The 2nd spray will then penetrate the lichen. For green moss and black mould, one application is normally sufficient. Your roof will normally take between 6 & 12 months to come clean. Again, this is totally dependent on how bad the contamination is.

Can I use Rapid Application safely on ANY exterior surface?

Sure can - absolutely ANY exterior surface. This one product cleans them all!

Great for all types of Roofs including Decramastic, Clay tile, Concrete tile, Super 6, Fibrolite, Colour steel, Zincalume (iron roof)

Asphalt (Blacktop)
Astroturf
Bowling greens
Butinol
Bricks & paving
Canvas tents
Caravan awnings
Concrete
Cow sheds
Driveways
Fibreglass boats
Fibreglass hulls/topsides
Fibrolite cladding
Flexipave
Glass/Plastic houses
Glass houses
Golf greens
Grouting
Hinuera stone
Inflatable dinghies
Limestone
Hockey pitches

Oamaru stone
Marble
Outdoor furniture
Outdoor pots
Paintwork
Paths
Patios
Patio furniture
Plastic houses
Pool surrounds
Shade sails
Solar Panels
Tennis courts
Teak decks
Textured finishes
Tiles
Timber decks
Tombstones
Umbrellas(outdoor)
Vinyl cladding
Weatherboards
Yacht dodgers/sails

How do I remove Lichen from any Exterior Surface?

Get Rid of Lichen With Rapid Application

Visually, section your area off into manageable parts.
Spot spray the lichen within each section.
Leave for 15-20 mins (while it is still damp) and then respray the lichen and the entire area of that particular section to ensure the plant absorbs the Wet & Forget/Rapid Application thoroughly.
The first application is to dissolve the waxy surface.
The 2nd spray will then penetrate into the roots.
This will ensure much better results for you. Remember that it will still take time to decompose and break away.

Before and After

Does work

We've used this multiple times and it does work. Like most it's quite slow acting a d can take a few months to see lichen drop off. Not sure for moss and mould. Best to wear goggles hard to use without getting it on you and in eyes and it stings a lot. I do find it a bit expensive would only buy on sale

The 'slow acting' is what makes Rapid special compared to most competitor products. No acid, bleach or caustic is what gives you the fast kill, but then the residual affect that keeps on working for some time after that ensures an inital clean up and then an ongoing sterilisation on porous surfaces. And yes, defiitely wear that eye protection if spraying above your head. In terms of price, on sale or even any other time taking advantage of our multi packdeals, is the way to get the best value.

Cleaned sky lights beautifully

Fantastic product, spray, light scrub, rinse and done. So easy. Commonsense is required - it contains chemicals, rinse to stop processing

Nothing at all like a skylight that lets light through & Rapid Application is just the product to get the job done with ease.

Toxic to animals

Kept the cat indoors but it residue left behind from the drift caused mouth burns and emergency vet care required once cat licked his paws.

Really sorry to hear about your cat and hope they've responded to treatment.
That's precisely the reason we have warnings on the front & rear of the Rapid bottle to keep animals of all surfaces until it has completely dried on the surface you are treating.

Versatile

I used Wet & Forget Rapid on the house roof, moss and Lichen have turned white already. I recently cleaned the exterior plaster walls of the house with detergent based product, as I could not reach one high part with a brush extension I tried Wet & Forget Rapid on that section, very pleased with results, even after a couple of days.

Versatilty is the key, as our tag line says, One Product - Any Surface

No warnings about spray drift, highly caustic irritant

READ THE MSDS BEFORE USING THIS STUFF!

Make sure you don't get as much as a drop of this on your eye(s) as you WILL end up in hospital. There is NO MENTION of requirements or hazards for this product on this page.

This has put one if my employees in hospital with eye irritation. No warnings at point of sale about the explicit requirement for wearing PPE.

I'm sorry your employee had an issue with getting the product in his eyes and glad to hear that with flushing with plenty of water at hospital, he is back at work with no further impact. We have as discussed added a warning to each page on our website regarding the use of PPE and again reiterate that warnings about using eye protection, gloves, not using when windy to help minimise drift etc have always been on our bottles and there is an implied responsibility on the user to read the instructions fully prior to use.

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Double Bubble: House Wash (1 x 2L)