Description
Surefire Couma All Weather Blocks Rodenticide contains 0.37 g/kg Coumatetralyl and serves as a highly effective first-generation multi-feed bait. Specifically, this product controls rats and mice across domestic, industrial, and agricultural sites. Consequently, users can deploy these blocks in farm buildings, dairies, meatworks, and wharf areas with confidence.
Additionally, the multi-feed mixture ensures that rodents return to the bait multiple times, which avoids bait shyness. Also, the active part breaks down fast within the rodent’s body. As a result, this process helps reduce the risk of secondary poisoning to non-target hunters such as owls or pets.
What makes Couma All Weather Blocks unique for agricultural and industrial use?
Surefire Couma stands out because it carries approval for use in macadamia, sugar cane, and pineapple farms. Notably, most standard baits lack these specific crop uses. These wax blocks resist water and withstand damp conditions, which makes them ideal for outdoor burrows. In addition, each block features a central hole. As a result, you can nail or wire the bait into place to prevent rodents from taking it away.
How long should you maintain a baiting programme?
You should maintain the baiting programme for at least two weeks to ensure you reduce the rodent numbers well. However, you must continue to fill the bait stations as long as rodents continue eating. Initially, rats and mice may take several days to get used to new bait stations. Thus, early placement and steady checks lead to better results.
How do these blocks enhance safety around the farm?
These blocks contain a bitter taste to prevent kids or other animals from eating them. Furthermore, the multi-feed nature of Coumatetralyl offers a safer profile for the area compared to single-feed baits. Resultantly, the chemical does not stay at high levels in the dead rodent. Notably, this fast breakdown protects local wildlife that might eat dead rodents.
Where is the best place to position the bait stations?
Specifically, you should place bait stations in areas of known activity, such as runways, roof spaces, and behind tools. For mice, you should place one to two blocks every three metres. Conversely, rats require one to two blocks at nine-metre intervals. In crop sites, you must place the stations along the edge to stop rodents before they enter the main area.
| Pest Situation | Application Rate | Distance Between Baits |
| Mice (Domestic/Industrial) | 30 to 60 g (1 to 2 blocks) | Maximum 3 m apart |
| Rats (Domestic/Industrial) | 30 to 60 g (1 to 2 blocks) | Maximum 9 m apart |
| Rats (Sugar Cane/Pineapple) | 60 g (2 blocks) per station | 9 m intervals |
Surefire Couma All Weather Blocks Rodenticide Specifications.
- Block Size: Approx 3cm x 3cm x 3cm
- Block Weight: Approx 30gm
- Pack Sizes:
- 2.4kg (80 x 30gm blocks)
- 8kg (266 x 30gm blocks)
Surefire Couma All Weather Blocks Rodenticide Registrant: PCT Holdings Pty Ltd. (APVMA #: 82217)



Karen Nemec (verified owner)
Rats went for the baits very quickly in problem areas, whole bait blocks gone overnight. Still replenishing those areas so final verdict on this product still to come but does seem very affective
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Sally Stelling (verified owner)
We were starting to get rats in the house roof as well as the stables. After 6 months of trying to control them with every raticide I could find, it became apparent that they had become resistant to everything! However, just before I called in the professionals, I checked to see what Specialist Sales had to offer. I’ve been purchasing products from them for 3 and a half years and have always been happy with their products, service and cost.
Once again, I wasn’t disappointed. The Couma blocks were effective within a few days and by the end of the week there were no rats (or poo) to be seen. Yee Ha!! Occasionally there has been evidence of a return visit, but after a couple of days it’s once again all clear. Phew!
Thanks again Specialist Sales. Sally
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Kevin (verified owner)
Took a couple of weeks to clear rat problem but certainly effective
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JJ (verified owner)
Rats in ceiling space couldn’t get enough of the bait in first week, consumption has dropped off considerably now so will be assessing kill rate over next few weeks. Quick delivery from Specialist Sales to NSW Far Coast, so will look to their site for associated products.
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michaelmekken (verified owner)
Works well. Placed in rubbish bin, against brick wall. Each morning up to 3 mice in bin until no more. Just have to kill them.
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Helen
I rely on this product to kill rats and mice, but not the local owl population: it is so important to consider what may be affected by eating a poisoned rodent. I don’t have to worry about the chooks finding a dead mouse, which has happened many times: it is an effective rodenticide, and, not killing anything else!
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Stephen (verified owner)
The bait design worked very well with my bait stations. Rodents were very attracted to the baits with good results.
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Barry (verified owner)
If these blocks aren’t working for you it’s not the blocks, it’s you! After following the directions it was just a matter of waiting. I admit I was skeptical after having the baits out for a week and still noticing rats but by day 8 there was a significant drop in activity. By the end of the second week, none at all. To top it off, although we kept our outdoor cat indoors for the first couple of weeks of treatment, the sneaky fat bastard did get himself a rat in week two, and guess what? Mr Garrison lives. So if I could give more than 5 stars I would.
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Polly Simmonds (verified owner)
It was easy to order, arrived quickly, and it works. I wore latex gloves to handle the baits and bait stations, and smeared a little bit of peanut butter on each block, using a plastic knife, before placing the blocks in the empty bait stations. A few weeks later, people in our building saw a poor giant dying rat on the footpath. It is good to know it works and that other animals won’t be killed through secondary poisoning.
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Craig Wilson (verified owner)
This product has worked a treat. No more rats in the chook house
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tony-5933 (verified owner)
Rats and mice do not eat this product. I have secured it in tubes with an alternative bait in the centre. These baits are untouched and the alternative is eaten fully. Rat and mice will go past this bait to eat a different one.
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Gisela
Great value for money as very safe and effective. Fast delivery
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Denise Shaw
We spread 10-15 pellets of Couma up in our ceiling cavity (where we could hear extensive mouse activity) and we could hear them being rolled around. Day 2 and one dead mouse outdoors on the lawn. We didn’t see another dead rodent, and there was nothing but silence in the ceiling. Waited for the bad smell of decaying mice to waft through the house… but none came. Bottom line, we don’t know if Couma did the trick, or if a spaceship came down from Mars and took all our vermin back with them, but we haven’t see or heard a mouse since. It’s quieter than a mouse, you could say.
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jim callan (verified owner)
excellent product, the rats/mice love it. I put some nails in a piece of wood and mounted some of the blocks to know it was being eaten, as the rodents want to take it with them.
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Lance (verified owner)
I researched to find a rodenticide that would be effective, but not harm the local wildlife – lizards and owls in particular.
This bait does the trick. The rats and mice feed on it for a few days, then game over.
I’m a repeat purchaser because they just work, plus no secondary poisoning.
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jtrigger83 (verified owner)
We brought a bucket last week and ordering another now – i really don’t like using baits due to secondary poisoning but feel safer with this bait. The rats are loving it !
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Ann Kay
Safe for pets it may be but as the rats don’t eat it, its safe for them too. Have waited two weeks and nary a nibble.
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specialistsales
Hi Ann and thanks for your review. The Couma All-Weather Blocks have been very popular and many of our sales are to repeat buyers who are very happy with the results. Not sure why the rats would be avoiding your blocks but please ensure that you have eliminated, as far as practicable all alternative food sources and that when handling the blocks you do not contaminate the blocks (or the immediate area) with human smells as this can deter the rodents. Studies have shown rodents will monitor new baits until they are convinced they are safe without threats. Providing the rodents with some free food close to your blocks is a good way to check if they are still active in the area and also gets them used to the new blocks.
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