About Sealant Flexibility
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Silicone Sealants



Made from silicone, these sealants are RTV (room-temperature vulcanizing). They’re non-sagging, so they won't drip from vertical and overhead surfaces.
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. Sealants that are good for joining dissimilar materials also work well in environments with wide temperature fluctuation.
Container | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Temp. Range, °F | For Joining | Specifications Met | Clarity | Color | Each | |
Loctite® Superflex Silicone | ||||||||||||||
593 | 2.7 | Tube | 30 min. | 24 hrs. | 300% | Not Rated | Soft (Durometer 18A) | -60° to 400° | Metal | UL 94 HB | Opaque | Black | 00000000 | 000000 |
593 | 6.4 | Nozzle-Top Can | 30 min. | 24 hrs. | 300% | Not Rated | Soft (Durometer 18A) | -60° to 400° | Metal | UL 94 HB | Opaque | Black | 00000000 | 00000 |
593 | 10.1 | Cartridge | 30 min. | 24 hrs. | 300% | Not Rated | Soft (Durometer 18A) | -60° to 400° | Metal | UL 94 HB | Opaque | Black | 00000000 | 00000 |
594 | 2.7 | Tube | 30 min. | 24 hrs. | 275% | Not Rated | Soft (Durometer 14A) | -60° to 400° | Metal | UL 94 HB | Opaque | White | 00000000 | 00000 |
594 | 6.4 | Nozzle-Top Can | 30 min. | 24 hrs. | 275% | Not Rated | Soft (Durometer 14A) | -60° to 400° | Metal | UL 94 HB | Opaque | White | 00000000 | 00000 |
594 | 10.1 | Cartridge | 30 min. | 24 hrs. | 275% | Not Rated | Soft (Durometer 14A) | -60° to 400° | Metal | UL 94 HB | Opaque | White | 00000000 | 00000 |
595 | 2.7 | Tube | 30 min. | 24 hrs. | 350% | Not Rated | Soft (Durometer 20A) | -60° to 400° | Metal | NSF/ANSI 51 | Clear | Clear | 00000000 | 00000 |
595 | 6.4 | Nozzle-Top Can | 30 min. | 24 hrs. | 350% | Not Rated | Soft (Durometer 20A) | -60° to 400° | Metal | NSF/ANSI 51 | Clear | Clear | 00000000 | 00000 |
595 | 10.1 | Cartridge | 30 min. | 24 hrs. | 350% | Not Rated | Soft (Durometer 20A) | -60° to 400° | Metal | NSF/ANSI 51 | Clear | Clear | 0000000 | 00000 |
SI 596 RD | 2.7 | Tube | 1 hrs. | 24 hrs. | 300% | Not Rated | Soft (Durometer 18A) | -60° to 600° | Metal | __ | Opaque | Red | 0000000 | 00000 |
SI 596 RD | 6.4 | Nozzle-Top Can | 1 hrs. | 24 hrs. | 300% | Not Rated | Soft (Durometer 18A) | -60° to 600° | Metal | __ | Opaque | Red | 00000000 | 00000 |
SI 596 RD | 10.1 | Cartridge | 1 hrs. | 24 hrs. | 300% | Not Rated | Soft (Durometer 18A) | -60° to 600° | Metal | __ | Opaque | Red | 0000000 | 00000 |
PR-1200 Primer for Dow Corning 700, 732, 733, 736, Loctite®, 76435T21, 76435T11, and 7545A611 Sealants (10.9 fl. oz. Bottle) | 0000000 | Each | 000000 |
Mildew-Resistant Silicone Sealants

Resistant to mold and mildew, these sealants are well suited to high-humidity environments. They’re non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone, sealants are RTV (room-temperature vulcanizing).
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. Sealants that are good for joining dissimilar materials also work well in environments with wide temperature fluctuation.
Container | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Temp. Range, °F | For Joining | Color | Clarity | Each | |
Loctite® Silicone | |||||||||||||
SI 5049 | 10.1 | Cartridge | 10 min. | 24 hrs. | 400% | Not Rated | Soft (Durometer 11A) | -30° to 250° | Metal Metal to Glass Glass Masonry | Clear | Clear | 00000000 | 000000 |
Noncorrosive Silicone Sealants


Also known as neutral-cure sealants, these won't discolor copper, brass, and concrete. They’re non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone, sealants are RTV (room-temperature vulcanizing).
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. Sealants that are good for joining dissimilar materials also work well in environments with wide temperature fluctuation.
Sealants that cannot be sold to California exceed local regulatory limits on VOCs (volatile organic compounds).
Container | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Temp. Range, °F | For Joining | Color | Each | |
Loctite® Silicone | ||||||||||||
SI 5011 CL | 2.7 | Tube | 20 min. | 24 hrs. | 300% | Not Rated | Soft (Durometer 20A) | -75° to 400° | Metal Metal to Plastic Metal to Rubber Metal to Composites Metal to Glass Plastic Plastic to Rubber Plastic to Composites Plastic to Glass Rubber Rubber to Composites Rubber to Glass Asphalt Composites Composites to Glass Glass Masonry Wood | Clear | 0000000 | 000000 |
SI 5011 CL | 10.1 | Cartridge | 20 min. | 24 hrs. | 300% | Not Rated | Soft (Durometer 20A) | -75° to 400° | Metal Metal to Plastic Metal to Rubber Metal to Composites Metal to Glass Plastic Plastic to Rubber Plastic to Composites Plastic to Glass Rubber Rubber to Composites Rubber to Glass Asphalt Composites Composites to Glass Glass Masonry Wood | Clear | 0000000 | 00000 |
SI 5109 | 10.1 | Cartridge | 60 min. | 24 hrs. | 300% | Not Rated | Soft (Durometer 15A) | -75° to 600° | Metal Metal to Plastic Metal to Rubber Metal to Composites Metal to Glass Plastic Plastic to Rubber Plastic to Composites Plastic to Glass Rubber Rubber to Composites Rubber to Glass Asphalt Composites Composites to Glass Glass Masonry Wood | Red | 0000000 | 00000 |
Structural Sealants

These structural sealants combine the mechanical strength of an adhesive with excellent sealing properties and high flexibility. They’re non-sagging, so they won't drip from vertical and overhead surfaces.
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. For joints between dissimilar materials and in environments with wide temperature fluctuation, choose a sealant with a higher elongation or joint compression/expansion tolerance. For high-wear applications, choose a harder sealant for the most abrasion resistance.
Container | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Temp. Range, °F | For Joining | Color | Each | |
Loctite® Hybrid Polymer | ||||||||||||
5510 | 10.1 | Cartridge | 24 hrs. | 7 days | 140% | Not Rated | Medium Soft (Durometer 44A) | -40° to 200° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Masonry Wood | Clear | 0000000 | 000000 |
5510 | 10.1 | Cartridge | 24 hrs. | 7 days | 140% | Not Rated | Medium Soft (Durometer 44A) | -40° to 200° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Masonry Wood | Gray | 00000000 | 00000 |
5510 | 10.1 | Cartridge | 24 hrs. | 7 days | 320% | Not Rated | Medium Soft (Durometer 35A) | -40° to 200° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Masonry Wood | White | 00000000 | 00000 |
5510 | 10.1 | Cartridge | 24 hrs. | 7 days | 375% | Not Rated | Medium Soft (Durometer 35A) | -40° to 200° | Metal Plastic Rubber Composites Masonry Wood | Black | 00000000 | 00000 |
Oil-Resistant Sealants



Make tough, flexible, oil-resistant seals. These sealants are non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone, sealants are RTV (room-temperature vulcanizing). Note: These sealants are not for use on parts that come into contact with gasoline.
Elongation and joint expansion/compression tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.
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 | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Tensile Strength | Hardness Rating | Temp. Range, °F | For Joining | Color | Each | |
Loctite® Superflex Silicone | |||||||||||||
5015 | 2.7 | Tube | 30 min. | 24 hrs. | Not Rated | Not Rated | Not Rated | Soft (Durometer 25A) | -65° to 390° | Metal | Blue | 0000000 | 000000 |
5015 | 10.1 | Cartridge | 30 min. | 24 hrs. | Not Rated | Not Rated | Not Rated | Soft (Durometer 25A) | -65° to 390° | Metal | Blue | 0000000 | 00000 |
5019 | 6.4 | Nozzle-Top Can | 30 min. | 24 hrs. | Not Rated | Not Rated | Not Rated | Soft (Durometer 25A) | -65° to 390° | Metal | Blue | 0000000 | 00000 |
High-Strength Self-Leveling Concrete Joint Sealants

Seal concrete joints in high-traffic locations—these sealants stand up to heavy wear and tear, such as steel wheel traffic. Thinner than non-sagging sealants, these flow easily into cracks and have a smooth finish.
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation. For high-wear applications, choose a harder sealant for the most abrasion resistance.
Container | For Max. Crack | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Mix Ratio | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Wd. | Dp. | Temp. Range, °F | For Joining | Color | Each | |
Loctite® Polyurethane | |||||||||||||||
PC 6231 | 8.6 | Cartridge | 3 min. | 90 min. | 1:1 | 82% | -10% to 10% | Hard (Durometer 75A) | 3/4" | 2 1/4" | -40° to 120° | Metal, Plastic, Rubber, Asphalt, Composites, Glass, Masonry, Wood | Gray | 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.
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 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 |
Medium Locking Strength | |||||||||||||
Loctite® Sealants | |||||||||||||
577 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3 1/8" | Paste | __ | Yellow | 00000000 | 00000 |
577 | 8.5 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3 1/8" | Paste | __ | Yellow | 0000000 | 00000 |
592 | 0.2 | Tube | 24 hrs. | 72 hrs. | 10,000 | 10,000 | -65° to 400° | 3/8" | Paste | __ | White | 00000000 | 0000 |
592 | 1.7 | Tube | 24 hrs. | 72 hrs. | 10,000 | 10,000 | -65° to 400° | 3/8" | Paste | __ | White | 00000000 | 00000 |
592 | 8.4 | Tube | 24 hrs. | 72 hrs. | 10,000 | 10,000 | -65° to 400° | 3/8" | Paste | __ | White | 00000000 | 00000 |
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.
VOC regulations restrict sales of sealants that cannot be sold to the listed jurisdictions/areas.
Container | Max. Pressure, psi | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size, fl. oz. | Type | For Fluids | For Gases | Temp. Range, °F | For Max. Thread Dia. | Consistency | Color | Cannot Be Sold To | Each | |
Low Locking Strength | |||||||||||
Loctite® Sealants | |||||||||||
5113 | 16 | Brush-Top Can | Not Rated | Not Rated | -65° to 300° | 2" | Paste | White | Los Angeles Area | 0000000 | 000000 |
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. Formulated without PTFE, these sealants are less slippery and less likely to result in overtightenting than sealants that have PTFE, making them good for plastic pipe where overtightening could lead to cracks and breaks. They have low locking strength, so they can be adjusted without tools.
Container | Max. Pressure, psi | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Mfr. Model No. | Size | Type | For Fluids | For Gases | Minimum Temp., °F | Maximum Temp., °F | For Max. Thread Dia. | Consistency | Color | Each | |
Low Locking Strength | |||||||||||
Loctite® Sealants | |||||||||||
5117 | 16 fl. oz. | Brush-Top Can | 10,000 | 10,000 | -65° | 400° | 2" | Thick Liquid | Black | 0000000 | 000000 |
5438 | 16 fl. oz. | Brush-Top Can | 10,000 | 10,000 | -65° | 300° | 2" | Paste | White | 0000000 | 00000 |
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 low locking strength prevent threads from loosening due to vibration and can be adjusted without tools.Sealants with medium locking strength prevent threads from loosening due to vibration and shock. They require a hand tool to unthread.
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 | Color | Each | |
Low Locking Strength | ||||||||||||
Loctite® Sealants | ||||||||||||
564 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Paste | Off-White | 0000000 | 000000 |
564 | 8.5 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | Not Rated to 300° | 3/8" | Paste | Off-White | 0000000 | 000000 |
572 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -55° to 300° | 3 1/8" | Paste | Off-White | 0000000 | 00000 |
Medium Locking Strength | ||||||||||||
Loctite® Sealants | ||||||||||||
542 | 1.7 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 1" | Thin Liquid | Brown | 00000000 | 00000 |
571 | 8.5 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Thick Liquid | Brown | 0000000 | 000000 |
580 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Paste | White | 00000000 | 00000 |
5770 | 1.7 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 530° | 3/8" | Paste | Off-White | 00000000 | 00000 |
5770 | 8.4 | Tube | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 530° | 3/8" | Paste | Off-White | 00000000 | 000000 |
5772 | 1.7 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3 1/8" | Thick Liquid | Yellow | 0000000 | 000000 |
Thread Sealants for Hydraulic and Compressed Air Systems



Formulated for high lubricity, these sealants allow easy assembly of finely threaded hydraulic and compressed air system components. They're also free of fillers that could contaminate system media. These sealants are anaerobic, so they don’t begin to harden until coated surfaces are threaded together, blocking exposure to air. These sealants have medium locking strength, which prevents threads from loosening due to vibration and shock. They require a hand tool to unthread.
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 | Color | Each | |
Loctite® Sealants | ||||||||||||
545 | 0.02 | One-Time-Use Capsule | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Thick Liquid | Purple | 000000 | 00000 |
545 | 0.3 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Thick Liquid | Purple | 0000000 | 00000 |
545 | 1.7 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Thick Liquid | Purple | 00000000 | 00000 |
545 | 8.4 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 2" | Thick Liquid | Purple | 00000000 | 000000 |
5452 | 1.7 | Tube | 1 min. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Thick Liquid | Purple | 00000000 | 00000 |
5452 | 8.4 | Tube | 1 min. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Thick Liquid | Purple | 00000000 | 000000 |
569 | 1.7 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Thin Liquid | Brown | 00000000 | 00000 |
569 | 8.4 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3/8" | Thin Liquid | Brown | 00000000 | 000000 |
High-Temperature Thread Sealants

These sealants have high locking strength, so they work in demanding applications, such as securing mounting studs in motor housings. They also withstand applications with large temperature swings.
Heat cure sealant requires heat of at least 212° F to harden. Above 300° F, the sealant hardens in about 15 minutes. For temperatures below 300° F, it may take up to 4 hours to harden. It requires both heat and a hand tool to unthread.
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.
Sealants that cannot be sold to the listed regions are restricted due to VOC (Volatile Organic Compounds) regulations.
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 | For Use On | Color | Each | |
Medium Locking Strength | ||||||||||||||
Heat Cure Loctite® Sealants | ||||||||||||||
5540 | 16 | Can | 10 sec. | 12 hrs. | 2,900 | 2,900 | -40° to 1300° | 4" | Thin Liquid | MIL-S-15204 | Aluminum, Brass, Bronze, Iron, Stainless Steel, Steel, Titanium, Cast Iron, Galvanized Iron, Galvanized Steel, Metal, Tin, Pipe, Concrete | Brown | 00000000 | 0000000 |
5550 | 32 | Can | 10 sec. | 2 hrs. | 5,000 | 5,000 | -40° to 1500° | 6" | Paste | MIL-S-15204 | Aluminum, Brass, Bronze, Iron, Stainless Steel, Steel, Titanium, Cast Iron, Galvanized Iron, Galvanized Steel, Metal, Tin, Concrete | Brown | 00000000 | 000000 |
Thread Sealants for Refrigeration Systems

For use in refrigeration systems and applications exposed to strong chemicals, these sealants have excellent solvent resistance.
Anaerobic sealants don’t begin to harden until coated surfaces are threaded together, blocking exposure to air. These sealants have medium locking strength, which prevents threads from loosening with vibration and shock. They require a hand tool to unthread.
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 | For Use With | Color | Each | |
Medium Locking Strength | |||||||||||||
Loctite® Sealants | |||||||||||||
554 | 0.3 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3" | Thick Liquid | Refrigerant R-12, Refrigerant R-134a, Refrigerant R-22, Refrigerant R-404A, Refrigerant R-407C, Refrigerant R-502 | Red | 00000000 | 000000 |
554 | 8.4 | Bottle | 10 sec. | 24 hrs. | 10,000 | 10,000 | -65° to 300° | 3" | Thick Liquid | Refrigerant R-12, Refrigerant R-134a, Refrigerant R-22, Refrigerant R-404A, Refrigerant R-407C, Refrigerant R-502 | Red | 00000000 | 000000 |