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Litter Boxes
Modkat Flip white

Modkat Flip
Front-Entry Litter Box

Modkat XL - Front/Top-Entry Litter Box

Modkat XL
Front/Top-Entry Litter Box

Modkat - Top-Entry Litter Box

Modkat
Top-Entry Litter Box

Modkat Tray - Open Litter Box

Modkat Tray
Open Litter Box

  • Modkat Flip white

  • Modkat Flip
    Front-Entry Litter Box

  • Modkat XL - Front/Top-Entry Litter Box

  • Modkat XL
    Front/Top-Entry Litter Box

  • Modkat - Top-Entry Litter Box

  • Modkat
    Top-Entry Litter Box

  • Modkat Tray - Open Litter Box

  • Modkat Tray
    Open Litter Box

  • Litter Boxes
    • Bundles
    Modkat Flip Bundle menu

    Modkat Flip Starter Kit
    Front-entry bundle

    Modkat XL Starter Kit Front/top-entry bundle

    Modkat XL Starter Kit
    Front/top-entry bundle

    Modkat Starter Kit Top-entry bundle

    Modkat Starter Kit
    Top-entry bundle

    White Modkat Tray litter box bundle with reusable liners, gray litter mat and cat.

    Modkat Tray Starter Kit
    Open tray bundle

    Modkat bundles image
  • Modkat Flip Bundle menu

  • Modkat Flip Starter Kit
    Front-entry bundle

  • Modkat XL Starter Kit Front/top-entry bundle

  • Modkat XL Starter Kit
    Front/top-entry bundle

  • Modkat Starter Kit Top-entry bundle

  • Modkat Starter Kit
    Top-entry bundle

  • White Modkat Tray litter box bundle with reusable liners, gray litter mat and cat.

  • Modkat Tray Starter Kit
    Open tray bundle

  • Modkat bundles image
    • Essentials
    Litter Keeper - Two colors

    Litter Keeper
    Two colors

    Litter Mats - Multiple styles, colors & sizes

    Litter Mats
    Multiple styles, colors & sizes

    Tidy-Up Kit - Scoop holder & dustpan

    Tidy-Up Kit
    Scoop holder & dustpan

    Lounge + Play - Scratchers & toys

    Lounge + Play
    Scratchers & toys

  • Litter Keeper - Two colors

  • Litter Keeper
    Two colors

  • Litter Mats - Multiple styles, colors & sizes

  • Litter Mats
    Multiple styles, colors & sizes

  • Tidy-Up Kit - Scoop holder & dustpan

  • Tidy-Up Kit
    Scoop holder & dustpan

  • Lounge + Play - Scratchers & toys

  • Lounge + Play
    Scratchers & toys

  • Essentials
    • Refills
    Modkat custom liners - choose the correct liner type

    Liners
    Custom-fit refills

    Modkat Cat Litter additive box and 3 packs

    Cat Litter Additive
    Keeps litter fresher longer

    Odor Filters - Keeps things fresh

    Odor Filters
    Natural odor control

    Stain + Odor Remover - Eliminates smells fast

    Stain + Odor Remover
    Eliminates pet odors

    Modkat Refills used to keep things fresh.
  • Modkat custom liners - choose the correct liner type

  • Liners
    Custom-fit refills

  • Modkat Cat Litter additive box and 3 packs

  • Cat Litter Additive
    Keeps litter fresher longer

  • Odor Filters - Keeps things fresh

  • Odor Filters
    Natural odor control

  • Stain + Odor Remover - Eliminates smells fast

  • Stain + Odor Remover
    Eliminates pet odors

  • Modkat Refills used to keep things fresh.
    • Modkat Cat Litter additive box and 3 packs
    Modkat Cat litter Additive packaging on a concrete counter top with some bamboo charcoal granolas showing.
    Hand pouring out Modkat Charcoal Bamboo Litter Additive.
    Modkat Cat Litter additive box and 3 packs
    Modkat Cat litter Additive packaging on a concrete counter top with some bamboo charcoal granolas showing.
    Hand pouring out Modkat Charcoal Bamboo Litter Additive.
    3-Pack

    Cat Litter Additive

    Upgrade your litter with natural bamboo charcoal.
    $14.99
      • Helps absorb odors naturally
      • Keeps litter fresher, longer
      • One box lasts up to 3 complete litter changes
      • Works with all litter types
      • Made with natural bamboo charcoal
      • Fragrance free
      • Extends the life of your litter

      Why bamboo charcoal?

      Naturally porous bamboo charcoal absorbs odors instead of masking them with added fragrance, helping keep litter fresher between complete changes.

      • In the box: 3 × 80 g packets
      • Directions: Sprinkle one packet evenly over fresh litter each time you completely replace your litter. Scoop daily as usual.
      • Ingredients: Activated carbon treated with purified water, natural zeolite, green tea extract, persimmon extract, and DL-malic acid.
      • Care: Store in a cool, dry place away from direct sunlight.
      • Warning: Keep out of reach of children and pets. Do not ingest. If swallowed in large amounts, seek immediate medical attention.

    Questions, answered.

    Modkat Cat Litter Additive is a natural bamboo charcoal formula that helps absorb odors, keep cat litter fresher for longer, and extend the life of your litter between complete changes.

    Adding bamboo charcoal to fresh litter helps reduce odors, so your litter stays fresher between complete changes. Daily scooping is still recommended.

    Naturally porous bamboo charcoal helps absorb odor molecules instead of masking them with added fragrance, helping keep your litter box fresher for longer.

    Yes. Modkat Cat Litter Additive works with clay, tofu, crystal, corn, walnut, paper, and most other cat litter types.

    No. Modkat Cat Litter Additive is fragrance free. It helps control odors naturally with bamboo charcoal instead of perfumes or artificial fragrances.

    You may also like

    Bamboo Charcoal Filter Refills with basket holder
    Odor Filters + Holders $12.99
    Modkat XL on a gray Modkat litter mat with black cat inside the litter box and a Maine Coon standing on the mat.
    Litter Mat from $23.99
    Katch Litter Mat in gray color with textured surface to trap cat litter
    Katch Litter Mat $24.99
    Modkat Scratcher Lounge set
    Scratcher Lounge Set $69.99
    Litter Box Odor Filter Kit - Modkat
    Odor Filter Refills (2-pack) $11.99

    Charcoal-based additive highly effective at controlling odor for multi-cat households. Customers said it "made a tremendous difference" and "works wonderful in reducing odor." Most praised its deodorizing power, though some found cost high for multi-cat homes. A few noted no difference in odor control. Works with various litter types.

    • 5 stars: 30 (79%)
    • 4 stars: 3 (8%)
    • 3 stars: 3 (8%)
    • 2 stars: 1 (3%)
    • 1 star: 1 (3%)
    B
    Barbara L. (Buffalo, US)
    Cat Liter

    I am very satisfied with this brand of cat liter. However, the cost is too high for my multi cat household.

    L
    Lisa G. (Merrick, US)
    great charcoal additive for litter

    I use tofu litter and I add this cat litter additive and it does its job.

    S
    Sara D. (Durham, US)

    The litter additive has made a tremendous difference in the "life" of the litter with two cats. Once a month after the litter is fully dumped, the pan liner cleaned and new litter is added, I add a pack of additive. Daily scoops is all that is necessary for the month.

    A
    Angela S. (Inverness, US)

    This works great, never smell the kitty litter. I highly recommend it.

    R
    Rosemary J. (Stephens City, US)

    Cat Litter Additive (3-pack)

    E
    Ellen F. (New York, US)
    Fabulous product - nothing else works as well

    I’ve tried many other charcoal type products. This is the only one that works well. It may be expensive, but it is worth every penny that my apartment doesn’t smell.

    S
    Steve F. (Plymouth, US)
    This stuff works

    Use it, you won’t be disappointed

    R
    Robin D. (Cupertino, US)

    Cat Litter Additive (3-pack)

    T
    Theresa M. (San Jose, US)
    Additive

    There are 3 indoor cats and this additive is very effective. I highly recommend using it.

    N
    Nancy W. (Coralville, US)
    Great purchase

    The cat additive works wonderful in reducing odor!!!! It definitely will be a continued purchase in the future!!

    A
    Abhi R. (Washington, US)
    Great purchase!

    Exactly as described! Kitten and family are both much happier!

    M
    Martha

    Best litter box ever!!! We have a cat that loves to kick her litter as far as she can. Life changing for the now no mess and no smell!

    A
    Aya B. (Atlanta, US)
    It works

    An obvious difference with the smell!

    T
    Tori H.
    Still have not received

    Placed an order close to a month ago and still have not received anything 😕

    Hi Tori, we're so sorry as your package was lost in transit! A replacement is on the way and scheduled for delivery on Mon, 6/17. Customer support has emailed you directly with further details.

    M
    Melinda M. (Los Angeles, US)
    No odor control

    I do not notice a difference in odor with this product.

    K
    Kristen L. (Denver, US)
    Effective!

    Seems to work and the cats now prefer the box that I added this to. Wow! I wish it came in a single container instead of multiple small containers.

    K
    Kathy C. (Mount Laurel, US)

    Cat Litter Additive (3-pack)

    R
    Rene D. (Twin Lakes, US)

    Cat Litter Additive (3-pack)

    P
    Patricia R.P. (Brooklyn, US)
    Cat litter additive

    It works pretty good.
    I have made my own litter box deodorant which is pretty good too.

    A
    Arlena C. (Denton, US)
    Cat litter additive

    So far it’s working great. I’ve only opened one, and it seems to be working just fine.

    C
    Cindy

    Fast shipping and quality products!

    R
    Robin M. (Whittier, US)
    Handy item keeping your kittys cleaning supply nearby

    Nice setup with a sweeper and scooper.
    Takes little space and looks discreet..

    A
    Angela M. (Houston, US)
    Worked well

    This really helped my cats litter. I'm not sure if it's the Bengal breed or cuz she is a kitten but the ammonia smell was awful. Adding this took it down 50% will buy again.

    B
    Baylee

    Favorite additive I've found so far! Not a must have product, but helpful for multiple cat home

    A
    Andrea L.
    Works really well!

    We use pretty kitty litter and started adding this to it. It works even better now!

    J
    Juliette S. (Antioch, US)
    Best deodorizer

    I have tried many many things to help reduce the odor from the litter boxes, and this product by far is the best deodorizer I have ever used.

    E
    Elizabeth G. (Elk Grove, US)
    OK

    My kitties box doesn’t usually smell. Just hoping the additive helps with bacteria so they don’t carry any “germs” around the house.
    Don’t particularly like the huge black junks in the litter, but they don’t seem to mind. Unsure if I’d buy again

    B
    Barbara G. (Indian Lake, US)
    Cat litter additive

    With 5 cats, keeping the litterbox small to a minimum has been a challenge. I have been using the charcoal additive for a week now and I am very pleased with how well it works!

    H
    Holger

    Interesting but didn’t see much of an effect, combined with the PetSmart Exquisicat clumping litter.

    J
    Jaye C. (Hoffman Estates, US)
    Cat Litter Additive is Great!

    I used a few packages of this additive while I was awaiting an appointment for my intact males. It neutralized even that strong of an odor! Very pleased.

    C
    Christie L. (Dallas, US)
    Can't really tell a difference

    I'm not sold on this, I can't really tell it's doing anything or extending the life of the cat litter. Could be because of the litter I am currently using, crystal, verses a clay clumping litter. I will update this if I see it works better with the clumping clay litter I am about to try.

    M
    Mari H. (Houston, US)
    Working very well

    Happy with this purchase. I added a package a week ago and it has reduced the small in the litter box.

    M
    Mari

    Holding the litter longer with less smell