Very good product. I always buy the Chemseal. Budget friendly too.
Aero T
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
August 23, 2024
I got the Kit 1, with 2.5oz of B2 sealant, labeled NSL brand. While I was dreading the project of fixing my fuel leak, this stuff is actually not bad to work with. It doesnt have a strong smell, and the mess is very manageable if you leave the back cap on and use the included applicator tip. Any excess sealant on the aircraft can easily be wiped away with acetone prior to full cure after that, use Poly Gone. Theres no need for a caulking gun or the sealant mixer tool that goes on a power drill. When freshly mixed, you can squeeze this out with just thumb pressure on the back. When you cant reach any further, push with a deep socket. Throughout the 2hr application time, the sealant will get harder, so if you think youll need that full time, squeeze it out into a paper cup and use popsicle sticks instead.
Kenneth J
November 17, 2023
Product was as good as we used at Bombardier aerospace
Richard C
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
October 24, 2023
Product is as good as we use at Bombardier aerospace
Richard C
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
October 24, 2023
awesome stuff
Rich P
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
October 21, 2023
Dang, this stuff is easy to use,,, and works well in any caulk gun.
Rich P
October 12, 2023
The tubes make sealing large areas a lot faster. Not having done many tanks, I can lay a bead, smooth it out and assemble the parts much faster using the tubes than batch mixes.
Marty T
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
July 15, 2023
It still has that pleasant odor and smooth, creamy taste. just kidding! If you have a large job to do, get the tube. It works great for sealing stringers and ribs because you can apply and spread it out quicker. When the pot life clock is running, its best to have a way to do things quicker.
Marty T
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
June 29, 2023
Did the trick, seals as described, nozzle included
Jeffrey F
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
June 20, 2023
Product arrived quickly , easy to use, my new go to for all tank repairs
Anthony W
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
May 25, 2023
Excellent stuff!
Mike C
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
April 11, 2023
Worked just as it should have. Sealed the leak from a crack in a fuel tank for a 1964 172.
Richard P
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
March 28, 2023
Worked as advertised. Used with Semco gun. No problems!
Calvin D
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
February 1, 2023
Does the job. Great sealant.
Top F
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
February 1, 2023
excellent product. very quick shipping time.
Gregory T
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
November 23, 2022
had to throw it in the trash because the container malfunctioned
Darwin T
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
September 10, 2022
I ordered 3.5 oz tube which was WAY more than needed to seal approximately 6 linear feet of fuel tank on a RV6A. Smallest quantity would have been fine.
Dale K
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
August 22, 2022
Sealed my chem, thanks.
Mark T
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
June 1, 2022
My kit came with a nozzle, just FYI for future customers
Thomas F
April 19, 2022
Really excellent! Take your time to properly mix it up and youre good to go!
Jerry O
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
March 3, 2022
Hard to mix thoroughly but it does the job
Tony F
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
February 23, 2022
The tubes of sealant were quickly delivered and the product worked as advertised. Well worth the price versus replacing the fuel tank.
Gary V
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
February 4, 2022
I have been using this product on the last 2 experimental aircraft build, love this stuff, great bonding strength
Maurice C
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
January 29, 2022
It sticks like s--t to a wool blanket!!!
Cobb A
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
January 20, 2022
Online vids help with instructions. Mixed it longer than minimum to be sure of thorough mix. Cure time doubled in cold hangar, as expected. Kept a sample to monitor cure status.
Ashcraft A
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
January 4, 2022
B2 is a little slow to cure in cool wearing but the longer working life really lowers the stress level if you have a lot of fasteners or rivets to get in before it sets up.
Wayne (
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
November 19, 2021
Aveox, I
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
November 4, 2021
Easy to mix and use. Follow directions on package. A Little stiff on application for smoothing with a paint brush. Very good!
Steven J
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
August 1, 2021
Great stuff! I see it in my airline career and on my 172. This was for my sons boat but hey it seals aluminum and sticks.
Phillip P
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
July 14, 2021
I bought two tubes. One worked properly the other one did not cure out. There was not enough hardener, in the mix, for it to set up properly.
Curtis I
Verified Purchase
Flamemaster Chemseal 6 Oz CS3204 B2
June 24, 2021
This is the perfect size for a tank leak repair. The mixing is almost automatic so you get a reliable cure. Ships fast and is worth the price.
Nicholas M
May 12, 2021
Worked great.. less mess.. easy to mix.. works in normal caulk gun as well! BONUS!
Ap
February 10, 2021
Highly recommend this product for sealing exterior pin holes on fuel bladders. Material can be applied on vertical surfaces and does not run or sag. Comfortable working time on previously prepared surfaces. Product has excellent surface bonding characteristics. Product appears to be resistant to ethanol blended fuels. Advise doubling recommended curing times
Alan Z
September 16, 2020
Fast Delivery, shame the freight is so expensive.
Geoff S
August 14, 2020
Perfect for sealing our fuel tank fuel level float and attached fittings. Long work life as advertised
David L
July 7, 2020
Easy to mix without the use of special tools. I pushed the product out of the tube using a socket and extension as a pushrod. The Class B2 has a working time of 2 hours and a cure time (at 77 deg F and 50% RH) of 72 hours. Product worked as expected and seems to retain a little flexibility.
Leo K
May 20, 2020
Great product, works as described
Bens M
January 30, 2020
Convenient size for small jobs. Getting it between 70F and 80F before mixing makes the mixing very easy. The product can be pushed out with a thumb and does not require anything other than the packaging to mix and apply.
William W
January 25, 2020
Works well as expected.
John R
January 16, 2020
Had a leak in an integral aluminum fuel tank that hadnt been sealed properly since built. Worked superbly.
Norm
November 24, 2018
Used sealant to repair obsolete 30 year old plastic fuel tank
Neil C
September 14, 2018
I really like this product. I use it at work on aircraft, and purchased it here to use at home on my airstream trailer renovation.
Joe S
April 6, 2018
Worked as advertised.
Used the mixing tool in my drill and mixing was easy and fast.
So far fuel tank is sealed up tight and nothing leaking.
Hope it lasts for many years to come.
Terry B
March 16, 2018
Addition... Mixing: I clamped a slow speed drill (pointing up)in my vise and chucked a hole saw (backwards) that had holes that (nearly) matched the plunger handle of the tube. A couple of #8 screws, and I now had a power mixer. Turn on the drill (CW) and move the tube full stroke up and down 50 times (overkill) or so. Dispensing: Like a previous reviewer, I just used a cheap $5 gun.. mine didnt even require making the plunger diameter smaller.. it fit perfectly...
James S
March 16, 2017
Used this (B-2)for sealing the fuel sending unit into the side of a wing tank. All is well. I would probably use the faster version next time (B-1/2). Cures very flexible, not as hard as Proseal, but it is a polysulfide product (like Proseal) so we will see how long it lasts.
James S
March 16, 2017
Although I waste more than I probably should, I never have any issues with these kits not curing properly. I bought a cheap caulking gun and ground the ram down a bit on my bench grinder so that it fits the plunger on these tubes. Presto! $5 proseal gun! (use a zip tie to make sure the tube stays anchored in the cheap big-box store caulking gun)
Dana R
January 24, 2017
This sealant works awesome. It cures to a hard rubber and really seals. After trying a different sealant and it not working, I was desperate to find something to seal up my fuel tank. This stuff fit the bill and is completely leak free.
Chet R
June 3, 2015
...make sure the metal is bare and clean, i had a wing tank neck/nipple that i had to have a welder extended higher to work with my newly built wing tanks, after welding he gave a shot of spray paint on where he buffed the metal. After i threaded the nipple/neck into the top of the wing tank, I smeared the sealant on the inside of the nipple at the junction of the threads in addition to putting sealant on the fine threads. The sealant i had on the smooth part of the inside of the nipple started to lift because of the spray paint the welder put on after welding.
Ken K
June 18, 2014
The brand I used says Flamemaster on the tube, which comes in a plastic bag. On the bag it says NSL Aerospace and shows a website www.nslaerospace.com the fuel fittings I used it on and even on my rubber dust cover where my wing tank fuel neck comes up through have all held out Excellent since I put it on last summer, and is still nice and flexible around my fuel neck nipple. I also used some to seal a rubber grommet on top of my white plastic football fuel tanks on my Ultralight and thats still Excellent.
Ken
May 16, 2014
I used it again with Excellent results, this time I was more aggressive with the mixing giving it more than the recomended min 50 strokes and like it says on the packaging extra mixing may initiate curing of sealant inside the cartridge...which it did, as I noticed it got hard to push it out of the cartridge ( I was just using my thumbs to push it out of the cartridge as I don't have the cartridge gun or know where they sell it ??) but I still had plenty of time to get what I needed out of the cartridge for my job on my new fuel tank...it works no leaks on the NTP threads !! Its too bad they don't make smaller tubes to eliminate waste, because once its mixed you must use it, as the stuff left inside the cartridge sets up to a rubber like solid compound within hrs or overnight.
Ken K
September 21, 2013
You must not have mixed it properly I used it twice and it cured within 4 hrs to where I was forced to open a new tube cause it cured enough that when I need more it was set up in the tube after 4 hrs in hot weather.
Ken K
September 13, 2013
I received two brands. One is Flame Master Chem Seal CS3204 from National Sealants & Lubricants and is excellent even after one year of storage it cures in one day at 28°C cures to a hard flexible rubber shining surface. The other brand was A-C-Tech AC-226 B4 from Advance Chemistry & Technology , and it didn't cure after 14 days just became less sticky.
Richardo
January 3, 2014
This product shipped by regular mail (USPS) and took to long to get.
Larry H
January 26, 2021