Precor IGR Concentrate

$6.70 - $52.32

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4.5 out of 5 stars Rating: 4.6

59 Reviews | 69 Q&A


{ $6.70 $50.50 $52.32
  Size/Description Price/Ea. Qty
Precor IGR Concentrate bottle (1 oz.) $6.70
Precor IGR Concentrate - Box (10 x 1 oz. bottles) box (10 x 1 oz. bottles) $50.50
Precor IGR Concentrate - 16 oz. bottle 1 pint (16 oz.) $52.32
Total Price: $0.00

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Precor IGR Concentrate

Only Precor IGR's molecules move to the places pre-adult fleas live, like the base of carpet fibers and between furniture cushions - in short, the sources of a flea infestation. Precor IGR targets fleas in the egg and larval stages of development. As a result, pre-adult fleas cannot produce new infestations of breeding, biting adults. PREVENTS ADULT FLEA EMERGENCE FOR 7 MONTHS.

For control of active flea infestations, this product works best when combined with an adulticide such as Suspend SC or Demize E.C. which will help to provide quick knockdown of adult fleas.

See our entire selection of professional IGRs.

Precor® IGR acts on the immature stages of a flea’s life cycle. Flea eggs deposited on or flea larvae crawling onto treated surfaces will not develop into adult fleas. Existing adult fleas and flea pupae are not affected and thus, Precor® IGR Concentrate is generally used in conjunction with an approved insecticide labeled for adult fleas. Effective, long-lasting indoor control of pre-adult fleas - up to seven full months. Mix with water to make 1 gallon of finished product. 1 oz.

To prevent infestations before they start, apply PRECOR prior to flea season.

When applied to surfaces where fleas are found, such as carpets, upholstered furniture, and pet sleeping areas, PRECOR prevents adult flea emergence for up to 7 months. Controlling fleas on pets is important to prevent introduction of adult fleas indoors. If fleas are a problem on pets, treat the pets with an effective EPA registered flea control product.

Prepare a diluted spray solution with a final (S)- Methoprene concentration of approximately 0.007%, by adding 1 oz of PRECOR to 1 gallon of water. Partially fill the mixing container with 1/2 gallon of water, add PRECOR, shake well, and then add the remaining 1/2 gallon of water. Shake well before each use. When tank-mixing, follow the directions above except add the product to tank mix first, agitate, and then add PRECOR, agitate and complete filling of spray tank, and agitate once more. Apply at a rate of 1 gallon of the diluted spray solution per 1500 sq ft of surface area with any low pressure sprayer with a fan tip that is typically used for indoor applications. Treat all areas harboring fleas, including carpets, furniture, pet sleeping and bedding areas, and throw rugs. Treat under cushions of upholstered furniture. Avoid contact with treated surfaces until dry.

When applying to upholstery where staining could be a concern, apply dilution to a small inconspicuous location to determine if possible staining could occur. Generally, PRECOR will not stain areas that would not be stained by water alone.

Rating Snapshot

5 stars   49
4 stars   3
3 stars   3
2 stars   1
1 star   3

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Average Customer Rating
4.5 out of 5 stars (59)

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Most Helpful Customer Reviews
  • 39 of 41 people found this review helpful:

    5 of 5 stars  Precor works
    By Jesse in MO on 01/03/2009

    Precor IGR Concentrate is fantastic for keeping the fleas away. We would recommend it to anyone.

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  • 31 of 33 people found this review helpful:

    5 of 5 stars  Precor cure!
    By Zac in Western PA on 08/15/2010

    I bought this stuff as backup. I used a bunch of the Precor foggers along with some Ultracide to get rid of the flea issues I was having. They took care of the problem. I bought this stuff just in case I needed it. Precor does the job, folks! Fleas have been bad in my state this year. EVERYONE has had fleas. EVERYONE! I gave 2 bottles away for people to try. They used this as the IGR (like box states) and then used cheap store brand foggers to kill the adults. They also agree, this stuff works good for the non-adult stages.

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  • 29 of 31 people found this review helpful:

    5 of 5 stars  Flea Control
    By Dagmar in Blountville, TN on 08/01/2011

    I ordered this after I found an empty bottle left by a pest control company that I had been paying every month, but cancelled because I was not happy with their service. I looked Precor IGR up on the internet and was very pleased to know that I could order it myself and do the pest control. I already knew it worked and was happy that I could save money by doing it myself. I liked the free shipping and the customer service rep. was very helpful. I am glad I asked about the existing adult fleas as this product does not deal with that issue. She directed to another product to mix with Precor IGR and I am happy to say, both products work wonderfully. After my initial investment, I will be saving money and be free of fleas and ticks.

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  • 27 of 27 people found this review helpful:

    5 of 5 stars  Precor IGR Concentrate
    By Jc in Onalaska, Texas on 07/24/2011

    Had used Precor IGR Concentrate some years ago but it became unavailable at any of the outlets in this area. Precor is probably the absolute most effective product for the control of fleas. The area here is having a sand flea epidemic/infestation due to migration of sand fleas because of the severe drought conditions. It took three applications of Demize EC and Precor IGR to finally render the house flea free. The first application was a mixture of four ounces of Demize and two ounces of Precor in two gallons of water. The second and third application were done with two ounces of Demize and one ounce of Precor in one gallon of water. This was done on three successive Friday mornings. The fleas gradually disappeared, and haven't seen any fleas since.

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  • 22 of 23 people found this review helpful:

    5 of 5 stars  Precor combined with Suspend SC
    By T in Spencer, WV on 11/06/2011

    I used this product in combination with Suspend SC for a flea problem that many other products failed to eradicate. One application and no fleas or signs of fleas for over two weeks. One word of caution, there was a stout chemical odor for about an hour, but we just closed up the house and left for the afternoon and aired out upon return. Product worked fine for our family and we were all impressed that it actually performed as advertised.

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Most Recent Customer Reviews
  • 1 of 1 people found this review helpful:

    5 of 5 stars  Why me?
    By Heidi in Middletown Ct on 12/31/2017

    I am a disabled female living 2nd floor of apartment house. Women downstairs moved out in August. September landlords workers came to clean apartment and apparently there was fleas. No one told me. I caught him sneaking in 1st with bombs. Needless to say I and my son ended up with fleas. They ended up everywhere!!! Kitchen , bathroom my clothes. Ughhh! Anyhow used bombs , sprays, traps even salt. Nothing really worked. Saw advertisement on Do My Own website and saw their prices compared with other websites and others couldn't compare. Prices are great and PRECOR Concentrate kept my sanity!!. Minute I got it I mixed with another product for bigger flea stage and it worked. Joy Joy Joy in days I was finally able to sleep without scratching all over. I couldn't believe how quickly for me the product worked but you must remember to vacuum along with this. It truly saved me and will continue my regime every 3-4 months to keep the fleas out. Thank you Do My Own company you are my heroes along with Precor IGR Concentrate!!!!!!!!! Try it it works! Oh and no terrible smell!!!!!!!

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  • 4 of 5 stars  Works
    By Shai in Danville on 12/01/2017

    Bought this by mistake, but realized it could help with my dogs fleas. So I sprayed around his area. No more fleas

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  • 5 of 5 stars  Precor
    By Thompson in Milledgeville Ga on 11/19/2017

    Want to get rid of fleas but precor, it really works.

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  • 5 of 5 stars  Precor IGR Concentrate
    By Sharon in Byhalia, MS on 10/20/2017

    Effective product; good price; easy ordering process and speedy shipping.

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  • 5 of 5 stars  Great Product
    By Dawn in Belmont Ohio on 10/20/2017

    This is awesome!! We had fleas so bad my husband had bleeding sores on his legs from scratching flea bites. We sprayed with this mixture and then with home defense spray twice and after about a week we were flea free!!

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  • 5 of 5 stars  Precor
    By Barbara in Milledgeville Ga on 10/05/2017

    This will kill the fleas

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  • 5 of 5 stars  This stuff works
    By Rick in He met California on 09/29/2017

    Reliable products fast delivery

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  It works but be patient!!!
    By Fred in Curwensville pa on 09/17/2017

    So we were INFESTED, kids bit up going to school, mom and I... You MUST attack fleas in my opinion in 3 ways. Clean floors a lot. I sprayed house with precor/suspend poly, and toweled rubbed dogs with petcor. We lost hope still seeing fleas 3 weeks later, and lost hope yet again. A month and a half later we kinda forgot about the gradual flea decrease. 2 months later we asked each other "babe, have you seen any fleas"? She would say it was gradual but this method DID work! Fleas are stinkers and tricky. Don't think a sprits here and there of precor will do it overnight. There's a science to it. Research it on this site, stop wasting money at Walmart and come to this site, dmopc was the only thing that worked for us, shoot I've made a few bucks spraying for friends/neighbors, our camp was infested with lines of ants all throughout. A single treatment of termidor 2 years later still no ants. This company helps, DO YOUR RESEARCH AND READ REVIEWS!!!

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  • 0 of 1 people found this review helpful:

    4 of 5 stars  Preparing for fleas the weather dictates it
    By William in Alameda on 09/05/2017

    Haven't used it yet but I'm familiar with the products I'm sure I'll be more than satisfied

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  • 5 of 5 stars  PRECOR IGR CONENTRATE
    By Patti in KATY, TEXAS on 08/31/2017

    I love this product, it is inexpensive, easy to mix up & works wonders for fleas, kills them immediately, I ordered this product twice, I tried others, no more searching. I FOUND THE BEST FOR THE RIGHT PRICE, BYE BYE FLEAS

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Most Helpful Q&A's

10/18/2009 Andrea

QIs Precor IGR safe around dogs and cats?
I know you said Precor IGR is safe after it is dry. I have only hardwood floors in my house. Will it harm my dog who lays on them, even when it is dry?

ANo, once the Precor IGR is dry there is no worries about harm to a pet that lays on the surface.  Remember that Precor IGR is not an insecticide; it does not kill the insect.  It is a product that prevents adult insects from reproducing and is more of a pheremone type chemical that "messes" up the life cycle process of an insect.  It is very safe around children and pets and this is why it so popular to use these products in schools, day cares, and dog kennels.

68 of 71 people found this answer helpful.
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09/28/2012 Jeff from Beckley, Wv

QIs it safe to apply Precor IGR to mattresses and box springs for flea control?

AYou do not need to actually spray the mattress and boxspring with Precor for it to effect fleas that may be hidden there. If you spray around the area where the bed is located the fleas will still be effected because of the unique molecules of this product. You should also thoroughly vacuum the bed to remove as many fleas eggs and larva as possible.

35 of 35 people found this answer helpful.
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06/21/2010 Kristin

QHow long does is take Precor IGR Concentrate to dry after application?
I need to treat 2 bedrooms, living room, and kitchen. I don't have anyplace in the house to stay while waiting for the product to dry, so I've got to find someplace to go. The length of time it will take to dry will affect my choice of place to go.

ATypically most liquid applications take about 30 mintues to dry.  Specific times will vary based on temperature in the home and other factors. 

33 of 34 people found this answer helpful.
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11/29/2009 Mary

QI got Precor IGR on my skin. Is Precor IGR safe?
I read that methoprene (Precor IGR) is not toxic to humans. And it is found in some foods. I got this all over my body even in my hair and did not wash it off. What is the worse thing that could happen to me? Will I go bald and my skin sag?

AMethorprene (Precor IGR) is a very safe product that is non toxic to humans.  I'm sure you have showered off by now.  There should be no issues or worries with the product, it just needs to be washed off.

25 of 29 people found this answer helpful.
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08/03/2011 Lynn

QWhat product can I purchase from you that can be mixed with Precor which will kill adult fleas?

ATengard SFR would be a great choice for flea control. Tengard SFR is labeled for broadcast sprays on carpets and other flooring and can be mixed with Precor IGR for flea control.

22 of 25 people found this answer helpful.
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Most Recent Customer Questions

12/06/2017 Virginia from Houston

QCan I use Precor IGR on my dog?


No, Precor IGR is not for use on animals; it is for use in structures only. You can use Petcor Flea Spray on dogs and cats at least 12 weeks of age.

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10/25/2017 Jimmy from Chicago, Il

QWill a garden pump sprayer with a fan tip spray a fine enough mist to properly apply Precor indoors?
I have a garden sprayer with a fan tip and I'm concerned I wont be able to properly apply Precor around the inside of my house. Im wondering if the sprayer will dispense at too high of a volume for proper coverage. Is it recommended that a fine "mist" be used to dispense?


A fan spray or a mist when used on most standard garden sprayers is fine for your indoor application of Precor IGR. If you feel you are getting too heavy of an application you would either need to move faster as you treat or create less pressure in your tank to have the product not come out of the nozzle at such a high rate. If you find that this is still heavier than you would like to be spraying indoors for your personal preferences, we would recommend swapping to an aerosol can like Precor 2625 for indoor use instead to get that light application.†

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10/21/2017 Susan from Oxnard, California

QDo I need to remove my fish when they spray my classroom with Precor?


While Precor IGR shouldn't harm fish if used appropriately, you would need at miminum to cover the fish tank while spraying and until everything has dried and settled. If its easy to remove the fish before spraying then I would do so, but if†not, just covering them with a sheet or fabric to protect from particles getting in the water or filter would be sufficient.†

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10/17/2017 Stephanie from Richmond, Va

QIs Precor a residual product?
If I spray Precor/Conquer today, and a larvae hatches 5 days from now, will that new adult be affected by the Precor? I assume the residual Conquer will likely kill the flea, but if it lays eggs before it dies, will those eggs hatch?


Yes, both Conquer Insecticide and Precor IGR Concentrate will continue working after they are dry. While we do recommend retreating at 2-week intervals for active flea infestations, Precor can continue working for up to 7 months indoors (provided carpets are not steam-cleaned or shampooed). While Precor may not prevent eggs from hatching at all, it does prevent immature fleas from reaching adulthood.

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10/05/2017 Ronnie from Beckley, Wv

QCan Precor IGR Concentrate be mixed with Suspend SC?
I have several infestations going on so it would be helpful if I could mix Precor with the insecticide Suspense SC. Any dangers of doing that.


Precor IGR can mixed with other insectides for treating fleas. If mixing with Suspend SC, this would only be applied along baseboards, corners and cracks and crevices since Suspend SC cannot be broadcasted over carpeted areas which is recommended to treat for fleas. NyGuard IGR is a more versitle insect growth regulator and is labeled for more than fleas.†

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10/01/2017 Karen from Dover

QIf I got the carpet wet 1 week after spraying Precor IGR Concentrate, will this take the spray away?


If a bit of water touched the†Precor IGR Concentrate†treated area, it should be fine. It will not reactivate the product. If the carpet was steamed or shampooed, then some of the product will have been removed.

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09/17/2017 Fred from Curwensville, Pa

QCan Precor IGR Concentrate be diluted even more to sponge "Dip" my larger lab dog so long as doesn't lick until dry?


Precor IGR Concentrate†should NOT be applied to animals at any dilution. It is not labeled for a safe usage. We do carry products such as Martins Flea, Tick and Mange Dip.†When following the instructions on the†product label†for†Martins Flea, Tick and Mange Dip†it should not harm your dog if he licks after drying.† Sensitivities may occur after using ANY pesticide product for pets. If signs of sensitivity occur, bathe your pet with mild soap and rinse with large amounts of water. If signs continue, consult a veterinarian immediately.

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08/20/2017 Tracy

QCan you mix Precor IGR with boric acid ?


Precor IGR Concentrate†should be mixed with water only.† A boric acid product can be made separately and applied to voids, cracks and crevices, and other listed areas once the Precor application has completely dried.† Be sure to follow the label instructions for each product.†

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08/04/2017 Shameka from New York

QWhy doesn't Precor IGR work beyond 24 hrs?


As with most any concentrate, it is recommended to use all diluted†Precor IGR solution within 24 hours of mixing since the product is not designed to sit in solution and still remain stable and effective.

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07/21/2017 Kayla from Ohio

QWhat insecticide can be used with Precor?
We recently bought a house and it turns out was infested with fleas. We had a professional come out and he used Precor but the next day (and days there after) we were still seeing fleas. What can be used in tandem with Precor and vacuuming to kill these fleas?


Precor concentrate only helps stop the reproductive cycle of the fleas so if the professional only sprayed that before that is likely part of why you haven't seen a huge difference in flea numbers. If you are looking to spray inside the home you would want to use a product like Fenvastar Ecocap to mix with the precor and spray floors, baseboards, crevices, rugs and any other areas where fleas may be present. Once you spray the mixture of those two products down, let them dry completely before you or any pets or children re-enter the home. You will want to continue vacuuming every other day for 14 days and then on the 14th day you will do a reapplication of the same two products. You should not be spraying any more frequently than once every 14 days for flea control. The products will continue to work and slowly kill them out over time. If you have pets in the home make sure they are treated with a flea topical or collar and the outdoor areas around the home they frequent are treated as well.†

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