About Grease
More
About Lubricants
More
About Sealant Flexibility
More
Vacuum Leak Sealants
Seal leaks on vacuum systems and components.
Epoxy resin sealants, also known as Torr Seals, form a rigid bond.
Bentonite/petrolatum sealants, also known as Apiezon sealants, form a flexible, non-hardening seal that’s easy to remove and reposition.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/485/4852n14-@halfx_0e9s3_1712331671.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/b05/b05-generic-twopart-tubes-@halfx_637032729276356507.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/408/4084t44p1-f01a-digital@halfx_636961271654645627.png?ver=imagenotfound)
Container | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Type | Begins to Harden | Reaches Full Strength | Vacuum Rating, torr | Maximum Vacuum @ Temperature | Tensile Strength, psi | Hardness | Mix Ratio | Temp. Range, °F | For Joining | Color | Each | |
Epoxy Resin | |||||||||||||
2 fl. oz. | Cartridge | 60 min. | 3 days | High | 10 -9 torr @ 72° F | 5,000 | Extra Hard (Durometer 75D) | 2:1 | -45° to 245° | Metal, Glass, Masonry | Off-White | 0000000 | 0000000 |
4.2 fl. oz. | Tube | 60 min. | 3 days | High | 10 -9 torr @ 72° F | 5,000 | Extra Hard (Durometer 75D) | 2:1 | -45° to 245° | Metal, Glass, Masonry | Off-White | 0000000 | 000000 |
Bentonite/Petrolatum | |||||||||||||
2.2 lbs. | Can | 5 min. | 1 hrs. | Standard | 10 -4 torr @ 72° F | Not Rated | Not Rated | __ | 15° to 85° | Metal, Plastic, Glass | Gray | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/485/4852n12-@halfx_1712062678.png?ver=imagenotfound)
Container | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Vacuum Rating, torr | Maximum Vacuum @ Temperature | Tensile Strength, psi | Hardness | Mix Ratio | Temp. Range, °F | For Joining | Color | Each | |
Epoxy Resin | |||||||||||||
2 | Cartridge | 60 min. | 3 days | High | 10 -9 torr @ 72° F | 5,000 | Extra Hard (Durometer 75D) | 2:1 | -45° to 245° | Metal, Glass, Masonry | Off-White | 0000000 | 0000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/485/4852n13-@halfx_1711137834.png?ver=imagenotfound)
Loading Method | For Cartridge Size | Material | Each | |
Cartridge | 2 oz. | Plastic | 0000000 | 0000000 |
Low-Outgassing Silicone Sealants
![](/prerenderstable/mvPRE/contents/gfx/imagecache/765/7650t11p1-b05-digital@halfx_636961297160751660.png?ver=imagenotfound)
Compliant with ASTM E-595, these sealants produce almost no volatile materials in a vacuum. They’re made of silicone, so they’re RTV (room-temperature vulcanizing).
Elongation indicates flexibility—the higher the value is, the more a sealant can stretch.
Container | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Tensile Strength, psi | Hardness | Temp. Range, °F | Specifications Met | For Joining | Color | Each | |
5.8 | Cartridge | 150 min. | 7 days | 420% | -25% to 25% | 600 | Durometer 36A (Medium Soft) | -200° to 500° | ASTM E595 | Metal Plastic Rubber Composites Glass | White | 0000000 | 0000000 |
Vacuum Seal and O-Ring Grease
![](/prerenderstable/mvPRE/contents/gfx/imagecache/137/1378k36p1-g02a-digital@halfx_637032674437108591.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/102/10295k29p1-g02a-digital@halfx_637032252940234753.png?ver=imagenotfound)
A firm consistency and resistance to evaporation make this grease ideal for vacuum applications, such as flow meters, vacuum and pressure systems, and laboratory equipment. Apply directly to seals and O-rings to prevent drying and cracking.
NLGI viscosity grade is a rating of a grease's consistency. NLGI 1 is about the consistency of tomato paste. NLGI 2 is about the consistency of peanut butter. NLGI 3 is about the consistency of vegetable shortening and is comparable to Fomblin grease. NLGI 3.5 is between the consistency of vegetable shortening and frozen yogurt.
Grease with PTFE thickener resists aggressive acids, bases, and solvents. Chemours Krytox™ 240 grease is long lasting with an indefinite shelf life.
Grease lubricates most efficiently below the maximum temperature. Melting temperature is the point at which grease will fail and run out of equipment, leaving it to run dry. Nonmelting grease can be used at temperatures above the maximum temperature briefly, but then will break down more quickly.
Container | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
NLGI Viscosity Grade | Base Oil | Size, fl. oz. | Net Weight, lbs. | Type | Temp. Range, °F | Melting Temp., °F | Maximum Vacuum @ Temperature | Color | Specifications Met | Each | |
DuPont Molykote High Vacuum Grease—Silica Thickener | |||||||||||
3.5 | Synthetic | __ | 8 | Pail | -40° to 400° | Nonmelting | 10^-6 torr @ 72° F | White | __ | 0000000 | 0000000 |
3.5 | Synthetic | 5.3 | __ | Tube | -40° to 400° | Nonmelting | 10^-6 torr @ 72° F | White | __ | 0000000 | 00000 |
Chemours Krytox™ 240AB Type II—PTFE Thickener | |||||||||||
2 | Synthetic | 1/2 | __ | Tube | -40° to 450° | Not Rated | 5×10^-6 torr @ 100° F | White | MIL-PRF-27617 | 00000000 | 00000 |
2 | Synthetic | 2 | __ | Tube | -40° to 450° | Not Rated | 5×10^-6 torr @ 100° F | White | MIL-PRF-27617 | 00000000 | 000000 |
Chemours Krytox™ 240AZ Type I—PTFE Thickener | |||||||||||
1 | Synthetic | 1/2 | __ | Tube | -70° to 300° | Nonmelting | 4×10^-4 torr @ 100° F | White | MIL-PRF-27617 | 00000000 | 00000 |
1 | Synthetic | 2 | __ | Tube | -70° to 300° | Nonmelting | 4×10^-4 torr @ 100° F | White | MIL-PRF-27617 | 00000000 | 000000 |
PTFE Thickener | |||||||||||
3 | Synthetic | 3 1/2 | __ | Tube | 0° to 480° | 525° | 7.5×10^-4 torr @ 72° F | White | __ | 0000000 | 000000 |
Container | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
NLGI Viscosity Grade | Base Oil | Size, fl. oz. | Type | Temp. Range, °F | Melting Temp., °F | Maximum Vacuum @ Temperature | Color | Pkg. Qty. | Pkg. | |
DuPont Molykote High Vacuum Grease—Silica Thickener | ||||||||||
3.5 | Synthetic | 5.3 | Tube | -40° to 400° | Nonmelting | 10^-6 torr @ 72° F | White | 12 | 00000000 | 0000000 |