PT Tri-Die Pressurized Dust Insecticide

4.5 out of 5 stars 34 Reviews | 23 Q&A

PT Tri-Die Pressurized Dust Insecticide

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Average Rating

4.5 out of 5 stars Rating: 4.4

34 Reviews | 23 Q&A

Product Overview

PT Tri-Die Pressurized Dust Insecticide aerosol combines the repellency of pyrethrin and the long term stability and repellency of silica dust. PT Tri-Die leaves a dust residual behind after spraying that kills a wide variety of insect pests. PT Tri-Die is great for wall void applications and crack and crevice treatments.

Prescription Treatment Tri- Die pressurized dust offers a convenient, easy application with no additional equipment necessary. Pressurized, charged particles penetrate deep into cracks, crevices, wall and ceiling voids to provide an ideal uniform dust application, readily adhering to all surfaces. The unique 4-way red application straw can be used for void space application to deliver 360-degree coverage. PT Tri-Die offers three way insect control - contact, repellency, and residual effect. When an insect crosses through an application area the dust is attracted to the insect's oily or waxy outer cuticle and the insect loses body moisture and dies. The naturally derived active ingredient in PT Tri-Die creates an unsuitable environment for insect pests. PT Tri-Die is available in a convenient 8 ounce can making it easier to use in confined spaces and easier to store.

Features and Specs

Active Ingredient Piperonyl butoxide 4.8% Pyrethrins 0.6% Silicon dioxide 8%
Target pests Ants (excluding Fire, Harvester and Pharaoh), Bed Bugs, Beetles, Booklice, Boxelder Bugs, Cadelles, Cheese Mites, Chocolate Moths, Cigarette Beetles, Clover Mites, Cluster Flies, Cockroaches, Confused Flour Beetles, Crickets, Dark Mealworms, Dermestids, Drugstore Beetles, Earwigs, Elm Leaf Beetles, Firebrats, Flat Grain Beetles, Fleas, Grain Mites, Grain Weevils, Granary Weevils, Ground Beetles, Indianmeal Moths, Lice, Mealworms, Millipedes, Pillbugs, Red Flour Beetles, Rice Weevils, Sawtoothed Grain Beetles, Scorpions, Silverfish, Sowbugs, Spiders, Termites, Ticks, Trogodermas and Yellow Mealworms
For use in Apartments, Food Handling Establishments (including Food Processing Plants, Food Storage Areas, Meat Packing Plants, Restaurants), Homes, Hospitals, Hotels, Motels, Nursing Homes, Schools, Supermarkets, Transportation Equipment (Buses, Boats, Ships, Trains), Warehouses and Other Commercial and Industrial Buildings
Application Crack & Crevice and Voids, Direct Spray, Spot Treatments
Pet safe Yes, if used as directed on Label
Formulation Professional Product
NY (Restricted To Licensed Applicators Only)
Shipping Weight 0.69 lbs
Manufacturer BASF (Mfg. Number: 59014060)
UPC 804338140601
EPA Registration 499-385


Treatment Recommendations:


Inject dust into wall void areas around windows and door frames, openings around pipes and sinks, behind baseboards and beneath carpet, in cracks and crevices of cabinets and pantries, sewer and floor drains. In food areas: Apply to cracks & crevices and void areas between different elements of construction, between equipment and floors, openings leading to voids and hollow spaces in walls, equipment legs and bases.


Apply dust behind siding, into wall voids, around window and door frames, into cracks of foundations and other places pest may be entering the building. For Carpenter Bees, apply directly into entrance holes.

Review Search   
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  • 5 of 5 Stars

    Tri-Die Kills

    By Ron on 05/01/2010

    If you have carpenter bees, this stuff will take them out. Using the included tube, I sprayed this stuff in the hole and moved to the next hole. By the time I got to the third hole bees were falling out the previous two and dying. Wait a few days, then plug the hole with wood putty or cork. Done. The can says it works on other pests, too. I have to believe them, given it's effectiveness. I ALWAYS wear protective gear -- gloves, safety glasses and some kind of mask.

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    19 of 19 people found this review helpful

  • 5 of 5 Stars

    Long lasting residual

    By Jenny on 07/19/2008

    I worked with a reputable pest control company for 8 years and I have found Tri-Die to be a great repellent. I used this product for many insects. The beauty of this product is it is a long lasting residual and will keep most pests that come in from outside through cracks and crevices out of your home. It does leave a powder film where it is applied, so make sure you use only in wall voids and cracks as the label states. My target pest presently is ants.

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    16 of 17 people found this review helpful

  • 5 of 5 Stars

    Kills carpenter bees!!!

    By Ben on 05/26/2010

    In all the holes I could get to this seemed to work great to get rid of my carpenter bees. It leaves a white residue so be careful on trying to just spray where you need it to unless you want to have a big clean up issue afterwards.

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    10 of 10 people found this review helpful

  • 5 of 5 Stars

    Problem solved!

    By Jo on 08/31/2008

    Tri-die has rescued me on numerous occasions- particularly from ants. This weekend I've discovered it's a sure fire way to battle Springtails coming in around a window and french door. The Springtails have been freaking me out because two other professional insecticides that I normally use to handle just about every desert-dwelling insect that attacks my home had failed. This morning I remembered the can of Tri-Die and put it to work. Problem solved. Unfortunately my local Bug and Weed Mart has stopped carrying it. I'm happy to learn that I can order it online!

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    6 of 7 people found this review helpful

  • 5 of 5 Stars

    Tri die

    By Eric on 02/16/2018

    As a pest control owner this product serves a specific purpose. Spray on bed frames, back of headboards, dressers etc.

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    6 of 6 people found this review helpful

See all 34 customer reviews

Questions & Answers

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Can you use Tri-Die for bedbugs?

If I understand correctly, you can spray Tri Die on the fold and tufts on your mattress and box spring to instantly kill bedbugs. It has the residual effect of silica gel or DE for future killing. Is this correct?


Tri-Die does contain pyrethrins which offers a fast knockdown of insects when they are sprayed directly, and also contains silica gel for residual control.

According to the product label, "Take bed apart and treat cracks, joints and interior of framework. Mattresses and box springs should be treated especially tufts, folds, and edges. Picture frames, moldings and all cracks and crevices in the room should also be treated."

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11 of 11 people found this answer helpful

Does the silica gel in Tri-Die kill ants?

Yes, the silica gel in Tri-Die can kill ants. The silica gel left behind as a residual will cling to their exoskeletons and desiccate them.

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8 of 10 people found this answer helpful

I've have used Tri-Die, which works very well, but the darn thing jams.

Tri-Die is also subject to clogging, unfortunately that is just the nature of aerosol dusts. If you follow the tip below, you can help prevent any aerosol dust from clogging:

Tip: To prevent aerosol dust from clogging, make sure to turn the can upside down after each period of use and spray until just air leaves the canister.  This will clear the nozzle and keep it from oozing, and prevent clogging.

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8 of 8 people found this answer helpful

Can I use "Tri Die" to treat for Wood Carpenter Bees?

I know Delta Dust is the thing to use then plug hole, but I had someone come and treat my porch and they used a wet spray that dried to a powder that was called "Tri-Die". I read the label on the can for what it kills and it never listed carpenter bees (or any bees for that matter).... Although they were dropping left and right... Is it safe to say that "Tri-Die" will also work in killing these carpenter bees?

Tri-Die contains the active ingredients Pyrethrins and Silica Gel. This combination of active ingredients offers a pretty fast knockdown and residual control of lots of insects, even those the product is not labeled for.

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8 of 9 people found this answer helpful

Why did more bees show up after I sprayed Tri Die?

I have a little front porch with a roof that covers the entryway. I went outside to spray this in pretty much all the cracks (with the little clear tube that comes with it) and esp. sprayed where I have seen bees hovering around. I sprayed where the exterior wall meets the roof and mostly around the cracks nearest to the doorway. I went to mow the lawn after, and then came back to the front door when I was done and there were two big beefy wasps buzzing and hovering around the porch! And no there is a big carpenter bee too! I don't know if maybe I sprayed a nest? I really don't know how/why they could be attracted to it, but is that possible? I know it sounds silly but I have no idea what the heck is going on now lol. Any advice/thoughts?

It sounds most likely that they are not attracted to the Tri Die. Instead you probably sprayed the areas they like to nest and now they cannnot enter so they are just hovering near the areas they used to go into.

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6 of 7 people found this answer helpful

See all 23 customer questions

PT Tri-Die Pressurized Dust Insecticide 4.5 out of 5 stars Rating: 4.4 (34 Reviews / 23 Q&A)

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