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Hercules Megaloc Thread Sealant is a premium, multi-purpose blue paste designed for professional-grade sealing on metals and plastics. Engineered with DuPont KEVLAR, it offers exceptional leak-proof performance up to 12,000 psi hydraulic pressure and resists extreme temperatures from -50°F to 400°F. Its brush-top can enables easy application even in cold conditions, while its non-toxic, odorless formula ensures safe use without compromising durability or flexibility. Certified by NSF and CSA, this sealant guarantees long-lasting, crack-free joints that maintain integrity for years.



| Asin | B000L89G6A |
| Best Sellers Rank | #71,892 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #72 in Industrial Thread Sealants |
| Brand Name | Hercules |
| Color | Blue |
| Compatible Material | Alloy Steel, Aluminum, Copper, Fiberglass, Glass, Plastic, Polyvinyl Chloride, Stainless Steel |
| Customer Reviews | 4.5 4.5 out of 5 stars (304) 4.5 out of 5 stars |
| Global Trade Identification Number | 00032628158085 |
| Included Components | Painting Supplies;Abrasives & Surface Preparation;adhesive-caulk |
| Item Dimensions | 4 x 4 x 5 inches |
| Item Form | Foam, Liquid, Paste, Powder |
| Item Type Name | Hercules Megaloc Multi-Purpose Thread Sealant, 16 Oz, Can, Blue, Liquid Paste |
| Item Weight | 16 ounces |
| Manufacturer | Oatey |
| Material Type | Stainless Steel |
| Model | 15808 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Part Number | 15808 |
| Style Name | Liquid Paste |
| Supported Standards | NSF, CSA |
| Surface Recommendation | Pipe |
| Unit Count | 1 Count |
| Upc | 032628158085 |
| Water Resistance Level | Water Resistant |
User
Work the BEST !
This stuff is the only thing you need for all plumbing joints
User
Prevent gas wash out
Great for gas fitting from seizing. My 3 2's Hollies have 9 fitting . You don't want to see the metal tube start to twist. Put on the tube flare to prevent with gas resistance tape to keep from gas wash out!
User
Closes up the tough leaks
This compound has the perfect properties. Used it on some plastic parts, which often do not seal well and are risky to overtighten. Well worth getting this product. One bottle will last a lifetime for DIYers.
User
Different size
I purchased this item to replace my old can of megaloc. I should have looked at the ad as this is only 4 ounces and my original can was 8 ounce size. Be careful this can is only four ounces. Another thing that bothered me was that there was a sticker on top of the label instructions. I tried removing it but the stick on label is hard to remove to read instructions. Would purchase again if it was the larger size and maybe next time they don't put a bar code label on top of the instruction.
User
Stay put
Works great, did the job, highly recommend
User
Tough stuff
I had a slow leak on the strainer side of a pressure relief value for my home. Using teflon tape wasn;t enough. Slow drip that didn't stop with 5 days or the calicum in the water. Next tried just local stores pipe dope. Still the very slow drip. So finally put the teflon tape (wrapped so it didn't unravel when tightened) and then the Megaloc covering the teflon tape. The drip slowed and slowed and now all drips have stopped.The main problem was the strainer cover has an o-ring. The cover was never indented to hold the o-ring in place. However, the combination of the teflon tape and Megaloc pipe dope overcame the problem.
User
Excellent pipe dope.
Using this on a vacuum steam product with temperatures up to 200° f. I find it does an excellent job at lubricating the stainless steel fittings and when I remove fittings there's still plenty of dope on the threads helping to make a good seal. The steam rating and vacuum rating were very important to me and this product does the job well! Must be the Kevlar bits ... But whatever it is that makes it work, it's superior to the loctite product I was using before in both lubrication qualities, sealing ability, and durability. I highly recommend it.
User
Wonderful.
Great item. Did exactly what it’s suppose to do.
User
best Thread Sealant !!!!
I recommend this is best Thread Sealant.
User
Five Stars
Tel que décrit
User
Great product terrible delivery
Product excellent but delivery terrible. Just thrown on front lawn not front verandah.
Trustpilot
2 months ago
1 week ago