Manufacturer Model Number ManufacturerModel Number | Show |
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Manufacturer Model Number ManufacturerModel Number | Hide |
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Manufacturer Manufacturer |
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Container Size Container Size |
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Container Type Container Type |
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![]() | Bottle |
Type Type |
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Color Color |
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![]() | Green |
Locking Strength Locking Strength |
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Shear Strength Shear Strength |
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Consistency Consistency |
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Maximum Gap Size Filled Maximum Gap Size Filled |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Certificate Certificate |
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![]() | Material Certificate with Traceable Lot Number and Product Shelf Life |
Viscosity Viscosity |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Formulation Formulation |
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Clarity Clarity |
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Reaches Full Strength Reaches Full Strength |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Mixing Required Mixing Required |
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Begins to Harden Begins to Harden |
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About Structural Adhesives
More
Retaining Compounds for Oily Close-Fitting Parts

Even on oily surfaces, these retaining compounds keep their hold. Use them to fill gaps up to 0.015" to secure worn cylindrical metal parts such as shafts, bearings, and press-fit assemblies. These retaining compounds begin to harden once coated surfaces are pressed together, blocking exposure to air.
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.
Compounds with high locking strength require both heat and a hand tool to unthread.
Certificates with a traceable lot number and product shelf life are available for these products. Download certificates from ACTIVITY after your order ships.
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Mfr. Model No. | Size, fl. oz. | Type | Max. Gap Size Filled | Begins to Harden | Reaches Full Strength | Temp. Range, °F | Consistency | Viscosity, cP | Shear Strength, lbs./sq. in. | Color | Each | |
High Locking Strength | ||||||||||||
Loctite® Retaining Compounds | ||||||||||||
638 | 0.34 | Bottle | 0.01" | 4 min. | 24 hrs. | -65° to 350° | Thick Liquid | 2,500 | 3,625 | Green | 000000000 | 000000 |
638 | 1.69 | Bottle | 0.01" | 4 min. | 24 hrs. | -65° to 350° | Thick Liquid | 2,500 | 3,625 | Green | 000000000 | 00000 |
638 | 8.45 | Bottle | 0.01" | 4 min. | 24 hrs. | -65° to 350° | Thick Liquid | 2,500 | 3,625 | Green | 000000000 | 000000 |