Model#: MILN2441-21

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Milwaukee 2441-21 M12 12V Cordless Lithium-Ion 10 oz. Caulk and Adhesive Gun Kit

  • Milwaukee 2441-21 M12 12V Cordless Lithium-Ion 10 oz. Caulk and Adhesive Gun Kit
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Milwaukee's M12 Cordless Caulk and Adhesive Gun is the lightest, most compact cordless powered caulk gun on the market today. Providing up to 400 lb. of pushing force, the M12 Caulk Gun easily dispenses construction sealants and adhesives while offering enhanced dispensing control and precision with the variable-speed trigger and Max-Speed dial. Built with a 360 degree rotating collar to deliver maximum control around turns, the M12 2441-21 also features an automatic anti-drip, seal puncture tool and durable hook for easy storage when not in use.
  • Constant Flow Technology delivers consistent beads resulting in cleaner, faster installations.
  • Top speed dial and variable-speed trigger for complete dispensing rate control
  • Up to 40% lighter than other competitive cordless caulk guns on the market
  • Up to 400 lbs. of pushing force easily dispenses common construction sealants and adhesives
  • Automatic anti-drip function reverses plunger relieving pressure from the tube
  • Dispenses up to 150 10 oz. tubes of sealant on a single charge with the M12 REDLITHIUM battery
  • Part of the M12 System of over 90 tools
  • M12 12V Cordless Lithium-Ion 10 oz. Caulk and Adhesive Gun - 2441-20
  • (1) M12 REDLITHIUM CP1.5 Ah Battery - 48-11-2401
  • M12 Lithium-Ion Battery Charger - 48-59-2401
  • Piston Assembly
  • 10 oz. Carriage
  • Plunger Rod


Series: M12
Cordless: Yes
Length: 26.5 in.
Width: 4.41 in.
Height: 8.9 in.
Weight: 4.11 lbs.
Batteries Included: 1
Battery Amp Hour: 1.5 Ah
Battery System: M12
Battery Type: Li-Ion
Bluetooth Compatibility: No
CSA Safety: Yes
Case Included: No
Charge Time: 30 Minutes
Charger Included: Yes
Dispensing Force: 400 lbs
Dispensing Speed (IPM): 6
ETL Safety: Yes
Motor Type: Brushed
Power Source: Electric-Cordless
Tube capacity: 10 oz
UL Safety: Yes
Voltage: 12V



4.7 / 5.0
26 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (24)
No, I would not recommend this to a friend (1)
Easy To Use (24)
Powerful (6)
Value (3)
Battery Longevity (if applicable) (3)
Heavy (3)
Best Uses
Home Repair (6)
Large Projects (4)
Frequent Use (3)
Small Projects (3)
Meets a need I didn't anticipate!
I'd heard of these tools before but figured they were really only of reasonable value to someone working in a trade that requires that you apply lots of caulking, like a guy who installs windows for a living. Or maybe if you own a wooden boat.

I've discovered another category that the Milwaukee marketing people have so far neglected for this tool, and that is DIY guys who have developed arthritis in their hands. I made this discovery a few weeks ago when I went to squeeze the trigger on my trusty hand-powered caulking gun and I let out a "YEOW!" followed by a string of words they won't print here. Maybe they should advertise this tool in the AARP magazine.

It's a very nice caulking gun. I already had the batteries and charger for other tools so I bought the tool only. A neat feature is that when you let off the trigger it automatically "backs off" the plunger a bit, maybe 1/8" so the caulk won't continue to flow after you let off the trigger and make a mess. Even if you have arthritic hands it's easy to use. I'm just an average guy with one house to maintain, but this tool is so easy to use I'm looking for stuff that needs caulking. And it's a lot cheaper than having to hire somebody to do your caulking for you!

There is a learning curve to this tool but it doesn't take all that long.
September 28, 2019
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Frequent Use
Large Projects
Small Projects
Home Repair
Love the continuous feed and pressure release when you let off the trigger.
April 21, 2019
9 months ago
Yes, I would recommend this to a friend
Easy To Use
Ergonomic Design
Battery Longevity (if applicable)
Best Uses
Frequent Use
Large Projects
Small Projects
Very Happy
Seams crazy that you would need this but it works great and is very consistent and fast
August 6, 2018
1 year ago
Describe Yourself:
Yes, I would recommend this to a friend
Easy To Use
This thing actually works, but...
I purchased this to use installing a combined 150' of crown molding in two bedrooms, and then for other DIY homeowner projects as they come along. I chose the 12v instead of the 18v because of my anticipated infrequent use, the lower weight, and the lower costs of the tool and batteries. Initially, this gun is for the adhesive to attach the crown to the wall and ceiling, and for paintable caulk to touch up nail holes and crown joints. The gun lays a great bead along bonding surfaces, and you quickly develop a technique to apply the adhesive fast. Even with the recommended small hole cut in the adhesive tube end, you can lay on a lot of adhesive in short order. There is a speed adjustment dial with 6 number settings and click stops between each number yielding many speed choices. Also, the gun has a variable-speed trigger so adds even more flexibility to the device. My suggestion would be to set the dial at "2" to begin with and vary the speed with your trigger pull until you determine what speed will work best with your specific caulk or adhesive and the ambient temperature, how long your beads will be, and so on.

The 12v battery seems to last a very long time with the adhesive I'm using: four 10-oz tubes and still showing full charge. It also charges in about 30 minutes.

On the downside, this unit is still heavier than a manual caulk gun by far. If you're working overhead, e.g., caulking crown molding, it gets tiresome to hold. If you are used to working with a nail gun overhead, this gun is much lighter and you will have no problem. For work not overhead, the weight is not an issue at all.

CPOMilwaukee handled my order accurately and very quickly...positive experience all around.

Most of my DIY battery tools are DeWalt and Makita, this is my first Milwaukee. I'm impressed so far.
July 19, 2016
Yes, I would recommend this to a friend
Easy To Use
Saved my wrist
This tool saved my wrist which suffers from carpel tunnel issues. First use was 26 tubes of 30 oz crack sealer in a morning. It worked perfectly. I have read other reviews and they commented that it drips when stopped. The machine has sufficient pull back to prevent this in most materials. The dripping can't be prevented especially in material like self leveling material, which will just drip out without any pressure at all. Caulk guns, whether mechcanical or powered can't pull the piston in the tube back, you can only pull the plunger back which this gun does very well. Couldn't be happier. I also bought the 10 oz optional cartridge holder. Doesn't seem that I needed the extra battery or the 18 volt model.
July 1, 2016
Yes, I would recommend this to a friend
Easy To Use
Good product easy to use
Easy to use light weight battery seems to have good life
May 28, 2016
Yes, I would recommend this to a friend
Easy To Use
Good caulk gun
Its a good caulk gun, a lot heavier than I expected but okay. The auto retract feature really stops it from dripping. Smooth action
May 18, 2016
Yes, I would recommend this to a friend
Easy To Use
Best out there
I've been using a battery powered Wagner for the last 15 years. They stopped making them. I bought a Dewalt but it was heavy and the flow keeps going when you release the trigger. I first encountered milwaulkee when we had a broken windshield replaced and the tech was using one. I was impressed with it's operation so I purchased one to try out. This thing is light and easy to control. Appears to be well built. I even bought a spare as a backup unit.
April 13, 2016
Yes, I would recommend this to a friend
Easy To Use
This saves me ton's of time
I am installing 180 window units and each one goes through a tube of silicone caulking, with this it goes faster and my hand does not ware out.
Thanks again!
February 13, 2016
Yes, I would recommend this to a friend
Easy To Use
Happy elbows!
I am a 50 year old professional plumber who has developed severe tendonitis in both of my elbows.I have to make a lot of Penetration's through the metal roof and siding of the buildings I work in ( vent pipes, furnace exhausts, etc. ) I have to seal the flashings with an extremely thick commercial sealant.In warm weather it's a chore, in cold weather it's nearly impossible to squeeze the trigger on a standard caulk gun. By the time I'm finished, my elbows are on fire! With this mighty little brute I just press the trigger and go! I was a bit apprehensive about spending that much dough on a caulk gun, but after the first use, I realized that this tool is worth every penny! Way to go Milwaukee!
February 10, 2016

Questions & Answers

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Browse 3 questions Browse 3 questions and 4 answers
How many batteries does the kit come with? Description says battery pack. I take this to be 2 batteries. Please confirm.
Thomas H on Jan 7, 2018
BEST ANSWER: It comes with one battery.
Does this kit come with a carrying case?
beau on Oct 25, 2014
BEST ANSWER: That kit does not contain a carrying case.
Is this gun suitable for pu caulking for automobile windshields?if not which other model serves my purpose? I use 310 ml cartridge.
Thank you.
jigeesh on Oct 18, 2014
BEST ANSWER: Your question will be best answered by the manufacturer, who can more accurately provide technical support. Please call Milwaukee directly at 800-729-3878, or visit them online at

New Vs. Reconditioned

What's the difference between New and Factory-Reconditioned?

Factory-Reconditioned products have been returned to the manufacturer and are restored to like-new operating condition; they go through a rigorous testing and inspection process. Plus, they offer a significant savings vs. new.
  • Reconditioned products may have minor cosmetic blemishes or scratches that do not affect item performance.
  • Reconditioned products may not come with all of the consumables the new version comes with (bits, sanding pads/papers, cases, etc.).
  • Both come with a manufacturer warranty and are covered by our Money Back Guarantee; New is 30 days, Reconditioned is 120 days.
Condition: New Factory Reconditioned
Features: Same Same
Specs: Same Same
Includes: M12 12V Cordless Lithium-Ion 10 oz. Caulk and Adhesive Gun - 2441-20,
(1) M12 REDLITHIUM CP1.5 Ah Battery - 48-11-2401,
M12 Lithium-Ion Battery Charger - 48-59-2401,
Piston Assembly,
10 oz. Carriage,
Plunger Rod
M12 12V Cordless Lithium-Ion 10 oz. Caulk and Adhesive Gun - 2441-80,
(1) M12 REDLITHIUM CP1.5 Ah Battery - 48-11-2401,
M12 Lithium-Ion Battery Charger - 48-59-2401,
10 oz. Carriage,
Plunger Rod,
Piston Assembly
Availability: In Stock Out of Stock
Warranty: 1 Year 1 Year


The Milwaukee Warranty Every MILWAUKEE power tool is tested before leaving the factory and is warranted to be free from defects in material and workmanship. MILWAUKEE will repair or replace (at MILWAUKEE's discretion), without charge, any tool (including battery chargers) which examination proves to be defective in material or workmanship from five (5) years after the date of purchase. Return the tool and a copy of the purchase receipt or other proof of purchase to a MILWAUKEE factory Service/Sales Support Branch location or MILWAUKEE Authorized Service Station, freight prepaid and insured. This warranty does not cover damage from repairs made or attempted by other than MILWAUKEE authorized personnel, abuse, normal wear and tear, lack of maintenance, or accidents.

The warranty period for V28, M12 and M18 Li-Ion Battery Packs is two (2) years from the date of purchase. XC M18 Battery packs carry a (3) year warranty. The warranty period for Ni-Cd Battery Packs, Flashlights, Radios, and Professional Hoists (lever, chain, and electric) is one (1) year from the date of purchase.

*The warranty period for Portable Generators is two (2) years from the date of purchase.



This warranty gives you specific legal rights. You may also have other rights that vary from state to state and province to province. In those states that do not allow the exclusion of implied warranties or limitation of incidental or consequential damages, the above limitations or exclusions may not apply to you. This warranty applies to the United States, Canada, and Mexico only.

Please call Milwaukee Electric Tool Corporation for warranty questions at 800-729-3878