Vibra-Seal 517 Orange.
Low-viscosity, pre-applied orange thread sealant for both tapered and straight threads. Dries to a resilient, tight-clinging film with constant-on torque and excellent solvent resistance. Reusable — readjustable without stripping the seal. The low-viscosity GM-NA grade for domestic automotive prints calling out “Vibra-Seal.” 300°F rated.
Standard lead time 1–2 weeks — from receipt at our dock to coated parts back on yours. Rush accommodated on request. Customer pays inbound and outbound freight; F.O.B. St. Charles, IL.
FUNCTION
SEAL
THREAD SEALANT
VISCOSITY
LOW
TAPERED + STRAIGHT
TEMP RANGE
300°F MAX
CONTINUOUS SERVICE
ON-TORQUE
CONSTANT
VIBRATION-RESISTANT
REUSABLE
YES
READJUSTABLE
Low-viscosity orange thread sealant — tapered, straight, and readjustable.
Vibra-Seal 517 is the low-viscosity member of the orange Vibra-Seal family — the grade for automotive and industrial thread sealing applications where the thread fit is normal, the sealant needs to work on both tapered and straight thread forms, and the assembly may need to come apart for service.
The 517 formulation is a water-based, low-viscosity sealant that dries to a resilient, non-curing film on the thread surface. Low viscosity means the film flows into standard-clearance threads — NPT tapered fittings, straight-thread hydraulic connections, adjustment screws, and similar applications where the thread geometry does not present an unusually large gap. For assemblies with looser tolerances or larger leak paths, the 516 (high-viscosity) grade delivers the same constant-torque and GM-NA performance in a thicker, gap-filling formulation.
517 provides excellent solvent resistance alongside its sealing and locking functions — maintaining seal integrity against automotive fluids, hydraulic oils, and common solvents encountered in powertrain and chassis assemblies. The constant-on torque characteristic means the fastener or fitting runs down at consistent, predictable torque under both normal installation and vibrational loading in service. The non-curing film allows readjustment — adjustment screws can be backed out and re-tightened, gauge fittings can be repositioned, and sensor connectors can be replaced without stripping the sealed surface.
517 is the low-viscosity GM-NA variant in the Vibra-Seal line — the grade domestic automotive prints specify when they call out “Vibra-Seal” without a viscosity qualifier. When a print does specify viscosity, the choice is clear: 517 for standard fits, 516 for gap-fill. When no viscosity is specified on intake, confirm with the engineering desk. Orange is the universal color signal for both grades — in mixed-SKU production environments the grade number (516 vs 517) is the only visual differentiator, so label control matters.
SPEC AT A GLANCE
Why engineers reach for Vibra-Seal 517
Low-viscosity pre-applied orange thread sealant for both tapered and straight threads. Constant-on torque, excellent solvent resistance, vibration-resistant, readjustable. The low-viscosity GM-NA grade for “Vibra-Seal” print callouts.
- PRODUCTVibra-Seal 517 Orange
- FAMILYLoctite Vibra-Seal
- CHEMISTRYWater-based sealant film
- VISCOSITYLow — tapered & straight threads
- SOLVENT RES.Excellent
- FUNCTIONSeal (primary) · Lock (secondary)
- TEMPUp to 300°F continuous
- ON-TORQUEConstant — maintained under vibration
- THREAD TYPETapered AND straight
- OEM CONTEXTGM-NA variant for "Vibra-Seal" print callouts
- VS 516517 = low viscosity. 516 = high viscosity (gap-fill). Same color, temp, GM-NA.
- SERVICEYes — readjustable, reusable
Loctite Vibra-Seal 517 by the numbers, plainly.
The full datasheet is available below — these are the values engineers most often need before specifying. Anything missing, ask the engineering desk.
PRODUCT FAMILY
Loctite Vibra-Seal 517ORANGE
Low-viscosity member of the orange GM-NA Vibra-Seal family. 517 is the low-viscosity grade; 516 is the high-viscosity variant. Both orange, both GM-NA, both 300°F. Viscosity is the only decision point between them.
CHEMISTRY
Water-BasedNON-CURING SEALANT
Water-based sealant that dries to a resilient, tight-clinging, non-curing film. Remains flexible and readjustable in service — does not cure permanently like an anaerobic locker.
FUNCTION
Thread SealPRIMARY
Primary function is sealing — prevents fluid and gas migration through threaded joints on both tapered and straight thread forms. Secondary function is vibration-resistant locking.
VISCOSITY
LowTAPERED + STRAIGHT
Low-viscosity formulation suited for standard thread fits on both tapered (NPT) and straight thread assemblies. For looser fits or larger annular gaps, use Vibra-Seal 516 (high viscosity).
SOLVENT RESISTANCE
ExcellentSERVICE FLUIDS
Provides excellent solvent resistance — maintains seal integrity against most automotive fluids, hydraulic oils, and common solvents encountered in automotive and industrial service environments.
TEMPERATURE RANGE
Up to 300°FCONTINUOUS
Continuous-service ceiling to 300°F. Resistant to thermal cycling through full service range. For higher-temperature thread sealing, see Loctite Dri-Seal 513 (350°F).
ON-TORQUE
ConstantVIBRATION-RESISTANT
“Constant-on torque” — consistent, predictable installation torque maintained under vibration and thermal cycling. The joint does not loosen or seize in service.
THREAD COMPATIBILITY
Tapered + StraightNPT + UN/METRIC
Effective on both tapered (NPT) and straight (UN, metric) thread forms — broader thread compatibility than dedicated straight-thread-only sealants like Dri-Loc STS.
SUBSTRATE
All Coating Types+ MOST PLASTICS
Works on all coating types and most plastic substrates. Broad compatibility supports mixed-material assemblies in automotive hydraulic and pneumatic systems.
REUSABILITY
YesREADJUSTABLE
Non-curing film allows disassembly and reassembly. Joint can be readjusted in the field without stripping the seal — particularly important for adjustment screws, pressure gauges, and sensor fittings that require periodic calibration.
OEM APPLICATION
GM-NA"VIBRA-SEAL" CALLOUTS
517 is the low-viscosity GM-NA grade. Specified on domestic automotive prints calling for “Vibra-Seal” — confirm whether your print specifies viscosity. If no viscosity is called out, confirm with engineering desk on intake.
VISUAL ID
OrangeCOLOR-INSPECTABLE
Orange distinguishes the automotive GM-NA Vibra-Seal grades (516/517) from the white NSF grades (503/503HV). Orange = automotive GM-NA; white = plumbing/NSF.
MANUFACTURER SPECS