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LA-CO 42019 Slic-Tite is a premium PTFE thread sealant paste designed for metal and plastic pipe threads. It withstands extreme temperatures (-50 to 500°F) and high pressures (up to 10,000 PSI liquid), ensuring reliable seals for water, gas, steam, and more. The brush-in-cap jar allows precise, mess-free application, while its easy wash-off formula reduces cleanup time. Trusted by professionals for over 50 years, it’s the go-to sealant for durable, leak-proof connections.








| ASIN | B002KGIGDA |
| Best Sellers Rank | #21,874 in Automotive ( See Top 100 in Automotive ) #50 in Thread Lock Sealers |
| Brand Name | La-Co |
| Color | White |
| Compatible Material | Metal, Plastic, Polyvinyl Chloride |
| Customer Reviews | 4.6 4.6 out of 5 stars (299) |
| Global Trade Identification Number | 00048615420196 |
| Included Components | 1/2 pt Jar |
| Item Form | Paste |
| Manufacturer | LA-CO Markal |
| Material Type | Plastic, Polytetrafluoroethylene |
| Model | 42019 |
| Number of Items | 1 |
| Part Number | 42019 |
| Style Name | Brush in Cap Jar |
| Surface Recommendation | Plastic |
| UPC | 048615420196 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
J**F
Good stuff
This stuff works great for ceiling pipe threads. I like to put this on my threads and then a little bit of Teflon tape over top of it or vice versa. Definitely worth the money. Great seal, easy to use, and easily removed with a towel.
G**E
If it has threads this it!!
I've been using laco for 50 years of my life in the plumbing and gas fitting trade. High end restaurants,it seals the threads and has lubricant abilities which allows the fitting to tighten even better. Best part is years later when undoing fittings they come right apart. If I could give it 10 stars I would. Retired 4 years ago and yep got a bottle in my tool bag. Very easy to use and any excess wipes right off...
P**I
SUCCESSFULLY STOPPED an oil leak where the "name brands" failed!
THIS STUFF IS THE BOMB! Stopped an engine oil pressure sensor leak that the "name brands" failed to seal!!!! No need for long cure times either; just apply to threads, torque it down, and your good to go!! THIS IS NOW MY GO-TO THREAD SEALER!!
י**ף
👍
👍
T**R
Great stuff. I dislike tape.
Great stuff. Help end the use of Teflon tape!
W**M
Works good if you know your going to have to fix that pipe down the road
Used this brand since the 80's, the local vender doesn't sell it any more. Found it on... well you know this place.... I have taken pluming parts off that I have used this stuff on and 9 times out of 10 it comes off fairly easy, even if it has been years.
C**Y
Came up short
This is a great product. However the bottle I received came up a quarter light. Maybe because the lid does not close. Maybe for other reasons we do not mention here.
L**D
The last resort should have been my FIRST!
Like many on here, I had a plumbing fitting that would not seal well and not matter how much tape or tightening I did, it didn't stop with the micro leak. One application of this was all it took and I had no worries to start hanging drywall. Would recommend.
M**L
High quality pipe dope, smooth threading. Personally, I first tape, then dope with this. If you want to take joints apart at some point, this is it.
工**ん
臭い
G**N
Works fine
V**N
Leaking tin !!!! Applicator brush set solid ..
C**J
Great sealant and super good price
Trustpilot
3 weeks ago
2 weeks ago