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About Structural Adhesives
More
About Sealant Flexibility
More
Heavy Duty Threadlockers

To withstand demanding, high-vibration applications such as motor and pump housings, these threadlockers have high breakaway torque. They begin to harden once coated surfaces are threaded together and exposure to air is blocked.
Primer (sold separately) cleans the surface and decreases the time to reach full strength. It is recommended when working with aluminum, stainless steel, and titanium; black-oxide finishes, and cadmium and zinc coatings.
263 bonds oily fasteners and does not require primer. Those that meet NSF/ANSI 61 are good for use with drinking water systems.
Container | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Temp. Range, °F | For Max. Thread Dia. | Consistency | Viscosity, cP | Breakaway Torque, in.-lbs. | Color | Specifications Met | Each | |
High Locking Strength | |||||||||||||
Loctite® Threadlockers | |||||||||||||
| 263 | 8.45 fl. oz. | Bottle | 5 min. | 24 hrs. | -65° to 360° | 1" | Thin Liquid | 500 | 275 | Red | NSF/ANSI 61 | 000000000 | 0000000 |
Threadlockers for Drinking Water

Primer (sold separately) cleans the surface and decreases the time to reach full strength. It is recommended when working with aluminum, stainless steel, and titanium; black-oxide finishes, and cadmium and zinc coatings.
Threadlockers begin to harden once coated surfaces are threaded together and exposure to air is blocked.
243 secures aluminum, stainless steel, titanium, and plated fasteners without a primer.
Container | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Temp. Range, °F | For Max. Thread Dia. | Consistency | Viscosity, cP | Breakaway Torque, in.-lbs. | Color | Specifications Met | Each | |
Medium Locking Strength | |||||||||||||
Loctite® Threadlockers | |||||||||||||
| 243 | 8.45 | Bottle | 5 min. | 24 hrs. | -65° to 360° | 3/4" | Thick Liquid | 2,150 | 105 | Blue | NSF/ANSI 61 | 000000000 | 0000000 |
| 243 | 33.8 | Bottle | 5 min. | 24 hrs. | -65° to 360° | 3/4" | Thick Liquid | 2,150 | 105 | Blue | NSF/ANSI 61 | 0000000 | 000000 |
Threadlockers | |||||||||||||
| __ | 1.69 | Bottle | 10 min. | 24 hrs. | -65° to 350° | 3/4" | Thick Liquid | 1,200 | 150 | Blue | ASTM D5363, MIL-S-46163 Grade N Type II, NSF/ANSI 61 | 00000000 | 00000 |
Wicking Threadlockers

Apply these threadlockers on fasteners that are already installed—their thin consistency allows them to flow into small gaps. They begin to harden once coated surfaces are threaded together and exposure to air is blocked.
Threadlockers with high locking strength require both heat and a hand tool to unthread.
Container | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Temp. Range, °F | For Max. Thread Dia. | Consistency | Viscosity, cP | Breakaway Torque, in.-lbs. | Color | Specifications Met | Each | |
High Locking Strength | |||||||||||||
Loctite® Threadlockers | |||||||||||||
| 290 | 0.34 | Bottle | 20 min. | 24 hrs. | -65° to 300° | 1/2" | Thin Liquid | 40 | 90 | Green | ASTM D5363, MIL-S-46163A, NSF/ANSI 61 | 000000000 | 000000 |
| 290 | 1.69 | Bottle | 20 min. | 24 hrs. | -65° to 300° | 1/2" | Thin Liquid | 40 | 90 | Green | ASTM D5363, MIL-S-46163A, NSF/ANSI 61 | 000000000 | 00000 |
| 290 | 8.45 | Bottle | 20 min. | 24 hrs. | -65° to 300° | 1/2" | Thin Liquid | 40 | 90 | Green | ASTM D5363, MIL-S-46163A, NSF/ANSI 61 | 000000000 | 000000 |
Primers for Threadlockers, Retaining Compounds, and Acrylic Adhesives



To speed cure time on coated fasteners, aluminum, stainless steel, or titanium, apply these primers before using threadlocker or retaining compound. They also work with no-mix acrylic adhesives.
Primers in brush-top bottles also include a spray head for easy dispensing.
Container | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Size | Net Weight | Type | Drying Time | Consistency | Viscosity, cP | Color | Environment | Each | |
Loctite® Primers | ||||||||||
| 7649 | __ | 0.88 oz. | Aerosol Can | 30 sec. | Thin Liquid | 2 | Green | Food Industry | 0000000 | 000000 |
| 7649 | 1.75 fl. oz. | __ | Brush-Top Bottle, Spray Bottle | 30 sec. | Thin Liquid | 2 | Green | Food Industry | 0000000 | 00000 |
| 7649 | __ | 4.5 oz. | Aerosol Can | 30 sec. | Thin Liquid | 2 | Green | Food Industry | 0000000 | 00000 |
| 7649 | 1 gal. | __ | Can | 30 sec. | Thin Liquid | 2 | Green | Food Industry | 0000000 | 000000 |
Thread Sealants with PTFE


PTFE provides a slippery surface that keeps threads from binding. These sealants are anaerobic, so they don’t begin to harden until coated surfaces are threaded together, blocking exposure to air.
Sealants with low locking strength prevent threads from loosening due to vibration and can be adjusted without tools.
To adhere to safety standards for drinking water systems, use sealants that meet NSF/ANSI 61.
Container | Max. Pressure, psi | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Specifications Met | Color | Each | |
Low Locking Strength | |||||||||||||
Loctite® Sealants | |||||||||||||
| 565 | 0.2 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 00000000 | 00000 |
| 565 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 00000 |
| 565 | 8.4 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 00000000 | 00000 |
| 565 | 10.1 | Cartridge | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 00000 |
| 565 | 33.8 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 000000 |
| 567 | 0.2 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 400° | 3" | Paste | NSF/ANSI 61, UL Listed | White | 00000000 | 0000 |
| 567 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 400° | 3" | Paste | NSF/ANSI 61, UL Listed | White | 00000000 | 00000 |
| 567 | 8.4 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 400° | 3" | Paste | NSF/ANSI 61, UL Listed | White | 00000000 | 00000 |
| 567 | 11.8 | Brush-Top Can | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 400° | 3" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 000000 |
| 567 | 33.8 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 400° | 3" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 000000 |
Drip-Free Thread Sealants with PTFE
Apply this thread sealant stick without a mess. It contains PTFE, which provides a slippery surface that keeps threads from binding. Since the sealant is anaerobic, it doesn’t begin to harden until coated surfaces are threaded together, blocking exposure to air. It has low locking strength, so it prevents threads from loosening due to vibration and can be adjusted without tools. It meets NSF/ANSI 61 for use with drinking water.
Certificates with a traceable lot number and product shelf life are available for these products. Download certificates from ORDER HISTORY after your order ships.
Container | Max. Pressure, psi | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | Net Weight, oz. | Type | Begins to Harden | Reaches Full Strength | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Specifications Met | Color | Each | |
Low Locking Strength | |||||||||||||
Loctite® Sealants | |||||||||||||
| 561 | 0.7 | Stick | 5 min. | 72 hrs. | 10,000 | 10,000 | -65° to 300° | 3 1/8" | Semi-Solid | NSF/ANSI 61 | White | 0000000 | 000000 |
Non-Hardening Thread Sealants with PTFE

PTFE provides a slippery surface that keeps threads from binding. These sealants never fully harden, remaining pliable enough to self-heal and stop leaks before they start, so they’re often used in high-vibration applications that could cause standard thread sealants to fail. Since they have low locking strength, these sealants can be adjusted without tools.
To adhere to safety standards for drinking water systems, use sealants that meet NSF/ANSI 61.
Container | Max. Pressure, psi | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size, fl. oz. | Type | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Specifications Met | Color | Each | |
Low Locking Strength | ||||||||||
Slic-Tite Sealants | ||||||||||
| 4 | Brush-Top Can | 10,000 | 3,000 | -50° to 500° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 000000 |
| 8 | Brush-Top Can | 10,000 | 3,000 | -50° to 500° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 00000 |
| 16 | Brush-Top Can | 10,000 | 3,000 | -50° to 500° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 00000 |
| 32 | Brush-Top Can | 10,000 | 3,000 | -50° to 500° | 2" | Paste | NSF/ANSI 61, UL Listed | White | 0000000 | 00000 |
Drip-Free Non-Hardening Thread Sealants with PTFE
Apply these thread sealant sticks without a mess. They contain PTFE, which provides a slippery surface that keeps threads from binding. These sealants never fully harden, remaining pliable enough to self-heal and stop leaks before they start, so they’re often used in high-vibration applications that could cause standard thread sealants to fail. Since they have low locking strength, these sealants can be adjusted without tools. They meet NSF/ANSI 61 for use with drinking water.
Container | Max. Pressure, psi | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Weight, oz. | Type | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Specifications Met | Environment | Color | Each | |
Low Locking Strength | |||||||||||
Slic-Tite Sealants | |||||||||||
| 1.2 | Stick | 5,000 | 500 | -50° to 350° | 2" | Semi-Solid | NSF/ANSI 61 | Food Industry | White | 0000000 | 000000 |
Sealants | |||||||||||
| 1.3 | Stick | 2,000 | 350 | -50° to 350° | 2" | Semi-Solid | NSF/ANSI 61, UL Listed | Food Industry | Off-White | 0000000 | 0000 |
| 4 | Stick | 2,000 | 350 | -50° to 350° | 2" | Semi-Solid | NSF/ANSI 61, UL Listed | Food Industry | Off-White | 0000000 | 0000 |
Non-Hardening Thread Sealants

Often used in high-vibration applications that could cause standard thread sealants to fail, these never fully harden and remain pliable enough to self-heal and stop leaks before they start. They have low locking strength, so they can be adjusted without tools.
To adhere to safety standards for drinking water systems, use sealants that meet NSF/ANSI 61.
Sealants that cannot be sold to the listed regions are restricted due to local VOC (Volatile Organic Compounds) regulations.
Container | Max. Pressure, psi | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Type | For Fluids | For Gases | Temp. Range, °F | Consistency | Specifications Met | Color | Cannot Be Sold To | Each | |
Low Locking Strength | ||||||||||
Sealants | ||||||||||
| 8 fl. oz. | Brush-Top Can | 6,000 | 3,000 | 20° to 140° | Paste | NSF/ANSI 61 | Blue | CO, CT, DC, DE, IL, IN, MA, MD, ME, MI, NH, NJ, NY, OH, PA, RI, UT, Northern VA | 000000 | 000000 |
Reusable Non-Hardening Thread Sealants for Fine Threads

Formulated to flow into small spaces, use these sealants between fine threads. Threads coated with these sealants can be installed multiple times without recoating. They have low locking strength, so they prevent threads from loosening due to vibration and can be adjusted without tools. They meet NSF/ANSI 61 for use with drinking water.
Reusable Non-Hardening Thread Sealants for Coarse Threads

Much thicker than sealants for fine threads, these sealants bridge the gaps between coarse threads. Threads coated with these sealants can be installed multiple times without recoating. They have low locking strength, so they prevent threads from loosening due to vibration and can be adjusted without tools. They meet NSF/ANSI 61 for use with drinking water.
Thread Sealants
These thread sealants are anaerobic, so they don’t begin to harden until coated surfaces are threaded together, blocking exposure to air.
Sealants with medium locking strength prevent threads from loosening due to vibration and shock. They require a hand tool to unthread.
To adhere to safety standards for drinking water systems, use sealants that meet NSF/ANSI 61.
Container | Max. Pressure, psi | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Color | Each | |
Medium Locking Strength | |||||||||||
Sealants | |||||||||||
| 1.7 | Tube | 10 min. | 24 hrs. | 10,000 | 300 | -65° to 400° | 2" | Paste | White | 00000000 | 000000 |
| 8.4 | Tube | 10 min. | 24 hrs. | 10,000 | 300 | -65° to 400° | 2" | Paste | White | 00000000 | 00000 |
High-Temperature Thread Sealants

These sealants have high locking strength, so they work in demanding applications, such as securing mounting studs in motor housings.
Room-temperature cure sealants must be mixed with water for use; they harden as the water evaporates. Mix about five parts powdered-sealant to one part water to form a thick consistency similar to peanut butter. Hardening can be accelerated with heat; do not heat to above 200° F. They require a hand tool to unthread.
1000° F max. temp. sealants expand as they harden.
1500° F max. temp. sealants are for use on cement-lined pipe joints prior to welding. The heat from the welding torch helps them begin to harden.
Container | Max. Pressure, psi | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Mix Ratio | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Specifications Met | Color | Each | |
High Locking Strength | |||||||||||||
Room-Temperature Cure X-Pando Sealants | |||||||||||||
| 14 | Can | 60 min. | 24 hrs. | 5:1 | 5,000 | 5,000 | -300° to 1000° | 6" | Powder | NSF/ANSI 61 | Gray | 0000000 | 000000 |
| 14 | Can | 60 min. | 24 hrs. | 5:1 | 5,000 | 5,000 | -300° to 1500° | 6" | Powder | NSF/ANSI 61 | Gray | 0000000 | 00000 |
| 70 | Can | 60 min. | 24 hrs. | 5:1 | 5,000 | 5,000 | -300° to 1000° | 6" | Powder | NSF/ANSI 61 | Gray | 0000000 | 00000 |
| 70 | Can | 60 min. | 24 hrs. | 5:1 | 5,000 | 5,000 | -300° to 1500° | 6" | Powder | NSF/ANSI 61 | Gray | 0000000 | 00000 |
Thread Sealant Cord

Wind this multifilament cord into the grooves of tapered pipe threads to quickly create a seal. It can be applied to metal pipe up to size 4 NPT and plastic pipe up to size 1 1/2 NPT. The container includes a built-in cutter for fast application. After tightening, pipe can be loosened up to an eighth of a turn without leaking. Sealant meets NSF/ANSI 61 for use with drinking water in systems up to 180° F.
| Mfr. Model No. | Lg., ft. | Density, g/cm3 | Max. Pressure for Fluids, psi | Temp. Range, °F | For Max. Thread Dia. | Color | Specifications Met | Each | |
| 55 | 525 | 1.25 | 10,000 | Not Rated to 300° | 4" | White | NSF/ANSI 61 | 000000 | 000000 |




























