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🔧 Seal smart, seal strong — the last thread sealant you'll ever need!
LA-CO 42019 Slic-Tite is a USDA-authorized, heavy-duty PTFE thread sealant paste designed for metal and plastic pipe threads. It withstands extreme temperatures from -50°F to 500°F and seals a wide range of fluids including water, gases, and oils. Featuring a convenient brush-in-cap jar, it offers easy application and cleanup with a non-toxic, non-drying formula trusted by professionals for over 50 years.








| ASIN | B002KGIGDA |
| ASIN | B002KGIGDA |
| Best Sellers Rank | #129,325 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #652 in Hardware Sealers |
| Brand Name | LA-CO |
| Compatible Material | Plastic, Polyvinyl Chloride |
| Customer Reviews | 4.6 4.6 out of 5 stars (223) |
| Customer reviews | 4.6 4.6 out of 5 stars (223) |
| Date First Available | 21 July 2014 |
| Global Trade Identification Number | 00048615420196 |
| Item Form | Paste |
| Item model number | 42019 |
| Manufacturer | LA-CO Markal |
| Manufacturer | LA-CO Markal |
| Material Type | Polytetrafluoroethylene |
| Model | 42019 |
| Number of Items | 1 |
| Part Number | 42019 |
| Style Name | Brush in Cap Jar |
| Surface Recommendation | Window |
| UPC | 048615420196 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
J**F
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
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...
V**N
Leaking tin !!!! Applicator brush set solid ..
P**I
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!!
T**R
Great stuff. Help end the use of Teflon tape!
Trustpilot
1 month ago
1 month ago