TRUSTED QUALITY - Good Housekeeping Institute Approved for guaranteed performance
EASY APPLICATION - Spray format ensures quick, mess-free cleaning every time
VERSATILE SURFACE SAFE - Perfect for tiles, grout, uPVC, glass, silicone sealant, and more
LONG LASTING PROTECTION - Active formula prevents mould from returning, keeping surfaces fresh
BLAST AWAY STUBBORN STAINS - Effortlessly removes mould and mildew without scrubbing
Astonish Mould & Mildew Blaster 750ml is a powerful, no-scrub spray cleaner designed to eliminate stubborn mould and mildew stains on a wide range of non-porous surfaces. Approved by the Good Housekeeping Institute, its active formula not only cleans deeply but also prevents mould from returning, delivering long-lasting freshness and protection.
Specifications
Product Name
Astonish mould remover spray
Weight
3 Kilograms
Volume
750 Millilitres
Units
750.0 millilitre
Brand
Astonish
Format
Spray
Have a Question? See What Others Asked
Can this product be used to help combat mould growith on rubber door seal of washing machine?
Can this product be used on terracotta garden pots
can this be used on furniture?
Can I use this outside on the floors please
Reviews
4.5
All from verified purchases
F**D
Let us spray
This stuff really works. It bleaches mould so it disappears without having to paint over it. I have found that it works on wallpapered walls without affecting the wallpaper so is a miracle cure for mould. Just spray the mould and it disappears.
A**.
A Miracle Treatment!!
I am simply amazed at the effectiveness of this product and would have absolutely no hesitation in recommending it.I had several outdoor furniture cushions to clean. Some not too bad as they had been stored properly over the winter months but another set had been outside without a break for a straight 6 years. Both sets were green, black and ready for the bin though if I'm perfectly honest.Being the tight so and so that I am though I thought I would see if they could be salvaged first as getting replacements made would have cost a fair bit as they're not standard shapes or sizes.First of all, I washed them twice on a wool programme. Didn't make a great deal of difference but it did fade the dark green mould to a paler green. Still nowhere near clean enough to put them back on. So I trurned to Amazon to see what could be found on here. Based on reading the varied reviews I had several in my basket before I happened on this stuff. I thought for a £1 (delivered?!) it had to be worth a go before trying the more expensive offerings - which got pretty mixed reviews tbh.And boy, was I not disappointed! It took 2 good soakings and 2 full bottles to do all the cushions (a sofa and 2 arm chairs + 2 round seat pads) but I think it's fair to say I'm absolutely delighted with the result! They're not perfect and the 6 year set didn't fair as well as the others but they are a MASSIVE improvement on what I had before. Some of them even look new while some still have the odd stubborn mark. But I could probably remove even the stubborn marks with another soak.I washed them again on a wool cycle after the treatment as they smelled very strongly of bleach.The scent of bleach is still pretty strong several days after the treatment but if I put them back on the chairs outside the smell would disappear quite quickly but they're now stored in my garage for the winter.TOP TIP!Remember to put them back on your foam pads while they're still damp. Mine shrunk ever so slightly so would have been impossible to get on if I'd left them to dry first.I'm now going to get another couple of bottles so I've got some spare and whave already rcommended it to all I know.
Y**L
OK
Does the job. I use it on the bottom of my running trainers as well. Cleans them well.
A**X
Buy it
BANG and the mould was gone. 10/10 product, great price and I will be buying again. Smells a bit but that’s nothing an air freshener can’t stop, it smells like it’s doing its job!
M**E
I am Astonished!!
I reluctantly bought this, as I try not to buy too many chemicl based cleaning products however, it has got to the point where I really need something to help with cleaning the mould off of my shower. I have M.E. very badly so haven't yet had the umph to clean the shower, but just as a wee experiment, I decided to spray it on the inside of my shed, where there is a lot of mould. I was worried as it has been gradually getting worse over the past few years. I was even concerned that one particular bit might have been the beginnings of dry rot.The mouldy bits were high up near the shed roof, so I stood as far away as possible and sprayed the worst bits, leaving half of it as a kind of control, so I could see if it had done anything. I didn't rinse it off afterwards. I just left it for about a week. I also sprayed it on one of a set of four paving slabs outside my back door, again, just so I could see if the difference if it did work.Well, several days later I had a look in the shed, and was absolutely gobsmacked! The really nasty dry-rot-looking bit of mould looked completely different....very 'dead' and very pale. In fact the area where I had sprayed was markedly different to the untreated area! (see photos) I immediately went and got the spray and sprayed the other bits!!!! Lol The same thing had happened on the paving slab! (see photo).You could really see a difference! I had actually tried it on a couple of my beloved pebbles that I brought back from the Scottish islands, and all the green algae that was on them disappeared! They looked like they did the day I picked them off the beach, years ago.NB. This is the first time i have ever used a mould cleaner. For the larger outdoor areas, including the rest of the paving slabs, my decking (which is REALLY slippery from so much algae), and my huge collection of island pebbles and rocks, I intend to use Algon Algon Path and Patio Cleaner Ready to Use 5L by Algon . This is organic, and is not harmful to wildlife or pondlife.Update: have cleaned the shower now, and it worked brilliantly, except for a few wee places where the mould had got underneath some loose sealant. Wouldn't expect it to work there anyway. Make sure you read the instructions though, as there are quite s few surfaces that it is not suitable for eg. Chrome
S**S
Great product as usual
Make sure and wear old clothes when using if you don't want accidental Bleach marks everywhere...
D**D
Dreadful for ceilings
This was chosen after sorting by customer reviews star ratings.It seems to work ok in general but having the followed the instructions exactly, I can report that it still left spots on my bathroom ceiling.I shall update this review and provide an alternative that works better if I find one.UPDATE: if this product fails to get rid of any caked on mould black spots, especially from the ceiling, the gel Mould Magic Extreme (blue packaging) worked beautifully.
A**S
Ideal for removing mould and not harmful to pets once dry
This is very effective in removing mould, smells really nice doesn't smell strongly of bleach and is easy to use. Stubborn stains may need more than one application. The spray is quite big so will cover a large area also value for money
Common Questions
Trustpilot
TrustScore 4.5 | 7,300+ reviews
Khalid Z.
Great experience from order to delivery. Highly recommended!
1 week ago
Ali H.
Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.
Causes skin irritation. Causes serious eye irritation. Warning! Do no use together with other products. May release dangerous gases (chlorine). Keep out of reach of children. Read label before use. Wear protective gloves, eye and face protection. If on skin: wash with plenty of soap and water. If skin irritation occurs: get medical advice/attention. If in eyes: rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: get medical advice/attention. Wash hands thoroughly after handling. If medical advice is needed, have product container or label at hand.
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I have found that it works on wallpapered walls without affecting the wallpaper so is a miracle cure for mould. Just spray the mould and it disappears."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"A***."},"datePublished":"20 October 2021","name":"A Miracle Treatment!!","reviewBody":"I am simply amazed at the effectiveness of this product and would have absolutely no hesitation in recommending it.I had several outdoor furniture cushions to clean. Some not too bad as they had been stored properly over the winter months but another set had been outside without a break for a straight 6 years. Both sets were green, black and ready for the bin though if I'm perfectly honest.Being the tight so and so that I am though I thought I would see if they could be salvaged first as getting replacements made would have cost a fair bit as they're not standard shapes or sizes.First of all, I washed them twice on a wool programme. Didn't make a great deal of difference but it did fade the dark green mould to a paler green. Still nowhere near clean enough to put them back on. So I trurned to Amazon to see what could be found on here. Based on reading the varied reviews I had several in my basket before I happened on this stuff. I thought for a £1 (delivered?!) it had to be worth a go before trying the more expensive offerings - which got pretty mixed reviews tbh.And boy, was I not disappointed! It took 2 good soakings and 2 full bottles to do all the cushions (a sofa and 2 arm chairs + 2 round seat pads) but I think it's fair to say I'm absolutely delighted with the result! They're not perfect and the 6 year set didn't fair as well as the others but they are a MASSIVE improvement on what I had before. Some of them even look new while some still have the odd stubborn mark. But I could probably remove even the stubborn marks with another soak.I washed them again on a wool cycle after the treatment as they smelled very strongly of bleach.The scent of bleach is still pretty strong several days after the treatment but if I put them back on the chairs outside the smell would disappear quite quickly but they're now stored in my garage for the winter.TOP TIP!Remember to put them back on your foam pads while they're still damp. Mine shrunk ever so slightly so would have been impossible to get on if I'd left them to dry first.I'm now going to get another couple of bottles so I've got some spare and whave already rcommended it to all I know."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"4.0"},"author":{"@type":"Person","name":"Y***L"},"datePublished":"16 January 2025","name":"OK","reviewBody":"Does the job. I use it on the bottom of my running trainers as well. Cleans them well."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"A***X"},"datePublished":"4 March 2025","name":"Buy it","reviewBody":"BANG and the mould was gone. 10/10 product, great price and I will be buying again. Smells a bit but that’s nothing an air freshener can’t stop, it smells like it’s doing its job!"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"M***E"},"datePublished":"30 March 2014","name":"I am Astonished!!","reviewBody":"I reluctantly bought this, as I try not to buy too many chemicl based cleaning products however, it has got to the point where I really need something to help with cleaning the mould off of my shower. I have M.E. very badly so haven't yet had the umph to clean the shower, but just as a wee experiment, I decided to spray it on the inside of my shed, where there is a lot of mould. I was worried as it has been gradually getting worse over the past few years. I was even concerned that one particular bit might have been the beginnings of dry rot.The mouldy bits were high up near the shed roof, so I stood as far away as possible and sprayed the worst bits, leaving half of it as a kind of control, so I could see if it had done anything. I didn't rinse it off afterwards. I just left it for about a week. I also sprayed it on one of a set of four paving slabs outside my back door, again, just so I could see if the difference if it did work.Well, several days later I had a look in the shed, and was absolutely gobsmacked! The really nasty dry-rot-looking bit of mould looked completely different....very 'dead' and very pale. In fact the area where I had sprayed was markedly different to the untreated area! (see photos) I immediately went and got the spray and sprayed the other bits!!!! Lol The same thing had happened on the paving slab! (see photo).You could really see a difference! I had actually tried it on a couple of my beloved pebbles that I brought back from the Scottish islands, and all the green algae that was on them disappeared! They looked like they did the day I picked them off the beach, years ago.NB. This is the first time i have ever used a mould cleaner. For the larger outdoor areas, including the rest of the paving slabs, my decking (which is REALLY slippery from so much algae), and my huge collection of island pebbles and rocks, I intend to use Algon Algon Path and Patio Cleaner Ready to Use 5L by Algon . This is organic, and is not harmful to wildlife or pondlife.Update: have cleaned the shower now, and it worked brilliantly, except for a few wee places where the mould had got underneath some loose sealant. Wouldn't expect it to work there anyway. Make sure you read the instructions though, as there are quite s few surfaces that it is not suitable for eg. Chrome"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"S***S"},"datePublished":"1 February 2025","name":"Great product as usual","reviewBody":"Make sure and wear old clothes when using if you don't want accidental Bleach marks everywhere..."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"3.0"},"author":{"@type":"Person","name":"D***D"},"datePublished":"19 March 2025","name":"Dreadful for ceilings","reviewBody":"This was chosen after sorting by customer reviews star ratings.It seems to work ok in general but having the followed the instructions exactly, I can report that it still left spots on my bathroom ceiling.I shall update this review and provide an alternative that works better if I find one.UPDATE: if this product fails to get rid of any caked on mould black spots, especially from the ceiling, the gel Mould Magic Extreme (blue packaging) worked beautifully."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"A***S"},"datePublished":"15 February 2025","name":"Ideal for removing mould and not harmful to pets once dry","reviewBody":"This is very effective in removing mould, smells really nice doesn't smell strongly of bleach and is easy to use. Stubborn stains may need more than one application. The spray is quite big so will cover a large area also value for money"}],"aggregateRating":{"@type":"AggregateRating","ratingValue":4.625,"bestRating":5,"ratingCount":8}},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Can this product be used to help combat mould growith on rubber door seal of washing machine?","acceptedAnswer":{"@type":"Answer","text":"Oxylyze or oxygen bleach is good for removing moulds from rubber seals - works partly by lysing or cutting the anchor molecules that moulds use to attach themselves to the surfaces they're on, as opposed to killing moulds and bursting them. Takes few mins to get going but absolutely doesn't damage rubber seals in the slightest - works for the detergent tray too and pretty much anywhere else it's a problem.."}},{"@type":"Question","name":"Can this product be used on terracotta garden pots","acceptedAnswer":{"@type":"Answer","text":"I have never tried it on them, but if you do use it on them just remember that ASTONISH is very strong sort of bleach.My advice would be try it on a bit of Terracotta, and see what happens"}},{"@type":"Question","name":"can this be used on furniture?","acceptedAnswer":{"@type":"Answer","text":"I used it on Friday night on a child car seat covers that had gone mouldy in the shed,left it a few minutes,then cold wash and they came out good as new!! But I would test a little bit of fabric first,but think it would be okay"}},{"@type":"Question","name":"Can I use this outside on the floors please","acceptedAnswer":{"@type":"Answer","text":"Stuffs useless"}}]}]}