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Penetrants, Additives, Adjuvants and Additives for Herbicides. Wetters for Weedkillers and Herbicide Crop Oil

A range of penetrants, surfactants, adjuvants, wetters, stickers, anti-drift agents, anti-foam additives, and crop oils to assist the application and uptake of herbicides and weed killers into selected weed species.  Penetrants assist greatly with herbicide uptake and make your weedkiller more effective in a shorter time.  Buy penetrants, wetters, anti-foam, and crop oils at great prices.  We ship wetters NZ-wide. Shop now to get the best surfactant for herbicides.

BioWet - crop oil surfactant

Biowet is a natural herbicide spray oil.  Based on canola oil BioWet is a low-drift sticker to help keep your herbicide or pesticide on the target weed or crop.  Biowet is the perfect crop oil and is very safe to handle and use.

Spraywetter - wetters for herbicides

Spraywetter non-ionic surfactant for herbicides that improves penetration into target weeds, especially into harder and waxy plants. Faster uptake by the weed significantly reduces the rain risk period.

Spraywetter penetrant and wetter is recommended for use anytime with virtually all herbicides, in all situations where an organosilicone wetter/penetrant is not specified.

Superwetter - organosilicone penetrant

Superwetter is an organosilicone surfactant and weed spray wetter that provides optimum penetration into woody-stemmed species (gorse, blackberry, etc).  Organosilicone penetrants are recommended when these brushweeds are stressed as normal surfactant's often can't carry the herbicide into the plant effectively. 

Foam Crusher - anti-foaming agent

Foam Crusher is a siloxane-based anti-foaming additive for agricultural and horticultural spray mixes.

Spray Marker Dyes

Marker dyes to show where you have sprayed.

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BIOWET - Natural Wetter and Crop Oil
Brand: BioWet Code: BIOWET
BIOWET - Natural Wetter and Crop Oil
BioWet is a natural general-purpose wetting agent, penetrant, and spraying oil for crop and fieldwork.   An emulsified food-grade rapeseed oil that has been specially designed to help improve agrochem..
Starting From $59.80
Ex Tax:$52.00
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SPRAYWETTER - General Purpose Herbicide Penetrant and Turf and Sports Ground Wetter
20% OFF Small Packs
Brand: Spraywetter Code: SPRAY
SPRAYWETTER - General Purpose Herbicide Penetrant and Turf and Sports Ground Wetter
Spraywetter with Herbicides Spraywetter non-ionic surfactant, improves penetration, especially into harder and waxy plants. Faster uptake by the plant significantly reduces the rain risk period. ..
Starting From $33.35
Ex Tax:$29.00
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SUPERWETTER - Highly Effective Organosilicone Wetter and Penetrant
20% OFF Small Packs
Brand: Superwetter Code: SUP
SUPERWETTER - Highly Effective Organosilicone Wetter and Penetrant
Organosilicones provide optimum penetration into woody-stemmed species (gorse, blackberry, etc). Faster uptake by the plant; reduces rain risk. Boosts herbicide performance against harder-to-kill sp..
Starting From $43.01
Ex Tax:$37.40
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MSF600 / SuperWetter Package Deal - THE GORSE ENFORCER - Sale package for Gorse Control
Code: GORSEENF
MSF600 / SuperWetter Package Deal - THE GORSE ENFORCER - Sale package for Gorse Control
You get a 'combo' pack of MSF600 (metsulfuron-methyl 600g/kg) herbicide and Superwetter organosilicone wetting agent. This is sufficient for aerial spraying of four hectares at the full ‘mature gor..
$322.71
Ex Tax:$280.62
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BEEN THERE - Red Spray Marker Dye for Herbicides - PCBU PURCHASE ONLY
PCBU PURCHASE ONLY
Brand: Been There Code: BEENTHERE
BEEN THERE - Red Spray Marker Dye for Herbicides - PCBU PURCHASE ONLY
THIS PRODUCT CAN ONLY BE SOLD TO A BUSINESS OR SOLE TRADER OPERATING AS A PCBU(PERSON CONDUCTING BUSINESS). IT CANNOT BE SOLD TO THE PUBLIC AS THE MANUFACTURER IS UNABLE TO PACK THIS WITH CHILD-RESIST..
Starting From $49.45
Ex Tax:$43.00
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DONE THAT - Blue Spray Marker Dye for Herbicides
Brand: Done That Code: DONETHAT
DONE THAT - Blue Spray Marker Dye for Herbicides
A Blue Spray Marker Dye so you can easily see where you have sprayed and where you haven't.  This makes spraying easy. Compatible with most commonly used herbicides in New Zealand Makes it eas..
Starting From $32.78
Ex Tax:$28.50
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FOAM CRUSHER - Highly concentrated anti-foam for herbicides and pesticides
20% OFF Small Packs PRICE REDUCED
Code: FOAMC
FOAM CRUSHER - Highly concentrated anti-foam for herbicides and pesticides
Foam Crusher is an organosilicone based defoamer agent.  These are products that are added to herbicide and pesticide mixes to reduce the amount of foaming.  Although mainly used by the helicopter boy..
Starting From $34.49
Ex Tax:$29.99
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Showing 1 to 7 of 7 (1 Pages)
Thank you so much Shayne, the WEED LIBRARY is excellent, especially with the printable PDF’s!
J Anda
Great prompt response from Shayne at Rainbow & Brown. Needing info on eradicating Horsetail, excellent advice thanks so much.
- R Parsons
Thanks again, you guys are a wealth of information and help, happy to be purchasing from you.
- John C
I am truly delighted with the service you provide. Every email and question I’ve had regarding product usage and pre-purchase advice has been met with patience and accurate guidance. Despite being a small customer, you have treated me with exceptional care, and the level of service you offer is outstanding. I greatly appreciate your support and cannot recommend you highly enough to anyone in need of high-quality commercial-grade products at a great price. Once again, thank you for everything,and I will gladly spread the word!
- Veera
Always such good service from your company. Thank you so much
- Joy C
...you have always provided a great product and brilliant Customer Service - actually stands out in today's world of offshore, multilingual "Help" call centres which I personally dislike.
- Carol M
I really appreciate the time you've taken to answer me - very thorough :)
- Anna E
Though I am not a big customer of yours, one thing I would like to thank you for your prompt response(s) to my questions or text messages. I am very much impressed with your customer service as well as the quality of your products. Recently I bought some products (for a couple of hundred dollars from another company) and emailed them some questions regarding the products I bought from them but they went silent after one response. The email was sent to their territory manager with a follow-up and the owner as well one after the other but they didn't bother to respond. Perhaps I am a small customer and of no value to them. Unfortunately Rainbow and Brown doesn't manufacture those products but for sure I am not going to buy from them either. Once again thank you so much
- Surinder
Excellent customer service and great product - 10/10 for Rachel who was excellent to deal with including a mistake in ordering and she dealt with, my mistake not theirs!!The rectification went without so much as murmur. Top marks to all - there level of customer service went above and beyond.
- Campbell W
Awesome, thanks so much for your help. I made an order this morning on the website and did the bank transfer.
- Kieran G
Such a pleasure to purchase from your company that has by far the best customer service, advice and product we have come across in long time.
- Tracy Y
I have just purchased some Grassmate and it seems that is the best option. We spray small lifestyle blocks and more often than not we are boom spraying on properties where the owners are trying to establish pasture from the grass that is growing on the clay. Thanks so much for your reply and advice Michelle H
- Michelle H
Thank you Shayne for prompt reply, placing an order now.
- Philippe C
Thanks for your great service it is very much appreciated
- Mark M
Brought from you guys before, always good service, Hightly recommended A+++
- Jessop P
I tried Biowet as an alternative to reduce mortality in my beehives and the results matched the rate and efficiency of the regular penetrants. Excellent product.
- Herman R
Thanks for a fantastic trade, look forward to doing business with you again in the future.
- Graham B
You guys give great advice and service is always excellent. Been passing your name on to a few other franchises so hopefully they’ll start coming your way.
- Wallis H
A Big Thank You to all you guys. Excellent Service. I ordered my Granny and Fertilizer on Tuesday and received it this morning (Thursday) this was even to a Rural Delivery Address. Thank you Cheers Maurice
Maurice K
Awesome trade. Quick response and delivery. Now to get serious with the weeds. Thank you muchly AAA++++
- Raewyn M
Quick delivery and great quality. Thanks and highly recommended to all.
- Greg V
Thanks people that arrived super fast, keep up the good work.
- Murray B
Very helpful prior to purchase. Fast postage. Ka pai
- Illist G
As always very prompt delivery from R & B with their products. Very highly recommended
- Burkey
Awesome advice. Fantastic service and really fast delivery.. even to RD address!!
- Taikorea Gardens
Thank you, swift delivery despite the challenges of lockdown. Good value.
- Lynn T
Fast delivery, good product!
- Waiareka
The good guys of weed control. Another perfect trade. Highly recommend to people who are serious about killing weeds cost effectively. a+++++
- Nev
Arrived fast. Good price. Well happy
- Hewitt Builders
very prompt communication and delivery. very professional. highly recommended
- Tony V
Fantastic communication and service aaa+ Thank you
- Garretts
MSF600 is the only thing I've come across that's effective against Ivy and Privet. Outstanding product!
- Paul
Just ordered. Thank you very much...couldn't ask for a more helpful sale. Much appreciated
- Sophie C
Great thanks. Will stick to the grass mate as ordered for now. No clover issues so all good there. Your service is bloody great so thanks very much for that.
- Euan S
Great stuff. My order arrive yesterday --The purchase all happened so quick--how great. Yes --Day 1 -- ordered. Day two Invoice and paid for. Day 3 was at my place !! How's that. This is what used to happen 3 or 4 years ago years ago, that is why I have always patronized you --- B- great stuff, thanks
- Brian W
Although the reply, was not what I had hoped for in regards to my problem, I would like to thank you for taking the time to look into my issue. Far too many companies fail to answer any requests or just send an automated reply. It was obvious from your detailed response that you had actually taken the time to research it for me. Small things like this show your company in a very positive light, well done Thanks very much
- Glenn M
Thank you. This is the clearest advice I have received. Much appreciated. Thank you.
- Sam R
If you want good customer service, don't use this company BUT if you want exceptional customer service this is the company to choose. I asked the usual idiot questions and they were answered promptly and in language I could understand. I then bought their product and it performed better than expected and was affordable.
- Roy J
Many thanks we received the order within two days i have recommended you to the long list of farmers and lifestylers I know up here in the north and will be using your products in the future. Great dealing with you.
- Pete A
Great to talk to people who actually know what they're talking about. Great products prompt delivery....
- Gregg S
Buckshot: "Excellent product, easy to use. We carry on farm vehicles to control thistles, ragwort etc saves having to re-visit the paddock with a knapsack and hopefully some fuel!"
- Jodie
Wow! What great service. MSF 600 arrived in our letterbox this morning. Eat your heart out Covid 19. Rainbow and Brown are alive and well!
- Richard H
We just want to say how impressed we are with your awesome service and the speed of delivery. We ordered some products on Friday morning and they were delivered the next day to a rural delivery address. Thank you.
- Sue D