Pre-Applied Thread Sealing & Coatings.
Overview
Reliable leak prevention, applied in advance. Our pre-applied thread sealing coatings are engineered to deliver reliable leak prevention in fuel, hydraulic, pneumatic, and cooling system assemblies. These dry-to-the-touch sealants are non-curing adhesives that seal upon fastener installation, forming a durable, chemical-resistant barrier that eliminates the need for liquid sealants, Teflon tape, or post-assembly curing.
Pre-applied thread sealants, including Vibra-Seal 516 and 517 (orange), Dri-Seal 513 (white, NSF-approved), and Federal Process Everseal, are dry-to-the-touch sealants that seal upon fastener installation, forming a durable, chemical-resistant barrier for fuel, hydraulic, pneumatic, and cooling-system assemblies. No liquid pipe dope, no Teflon tape, no post-assembly curing.
SKUs IN CATALOG
8 ACROSS 3 LINES
TEMPERATURE RANGE
300°F → 350°F
TYPICAL LEAD
1–2 WEEKS · STD QTY
FREE SAMPLES
YES · COATED PARTS
How pre-applied thread sealing works.
A pre-applied thread sealant does the same job as liquid pipe dope or Teflon tape, without the mess, the cure wait, or the operator variability. Read left to right.
A · DRY FILM
Applied in Advance
A water-based sealant film is applied to the threads ahead of time and dries to the touch. The fastener is clean and inert in storage and handling — no wet chemistry, no mess at the assembly cell.
B · CURE ON INSTALL
Seals on the First Turn
On assembly the film is compressed between mating threads, forming a tight-clinging barrier that blocks fluid and gas leak paths from the first turn. No cure wait. No technique variability.
C · SERVICEABLE
Disassembles Clean
Non-curing sealant types stay resilient. The joint can be taken apart and resealed in the field — no scraping cured dope, no re-taping. Essential for any assembly that needs field service access.
Every sealing SKU we coat to.
All thread sealing & coatings are applied to your customer-supplied fasteners and fittings on standard 1–2 week lead times. SDS and technical data sheets are available for download.
Vibra-Seal
Pre-applied, water-based sealant that dries to a resilient, tight-clinging, non-curing film for tapered or straight threads. Vibra-Seal 516 (orange) and 517 (orange) are the GM-NA variant grades — specified on most domestic automotive thread-sealing callouts. Rated to 300°F. Reusable and resistant to most fluids.
4 SKUs
TEMP TO 300°F
REUSABLE
503 White
NSF-approved, low-viscosity pre-applied thread sealant with constant-on torque and vibration resistance.
503HV White
High-viscosity, thixotropic pre-applied thread sealant engineered for superior gap-filling on looser thread fits.
516 Orange
High-viscosity, pre-applied thread sealant with constant-on torque and vibration resistance.
517 Orange
Low-viscosity, pre-applied orange thread sealant for both tapered and straight threads.
Dri-Seal
Pre-applied, water-based sealant for higher-temperature service — rated to 350°F and resistant to most fluids. Loctite 513 (Dri-Seal white) carries NSF/ANSI 61 approval for use on potable-water-system fasteners. Flow-coatable for plumbing-line and food-equipment applications.
2 SKUs
TEMP TO 350°F
NSF APPROVED
513 White
Dri-Seal™ 513 (Low Viscosity) is a resilient, tight clinging, non-curing sealant for tapered or straight threads.
513HV White
Dri-Seal™ 513HV (High Viscosity) is a resilient, tight clinging, non-curing sealant for tapered or straight threads.
Everseal
An excellent water-based pre-applied sealant for sealing against air, hydraulic, and most other fluids. A proven option across general industrial fitting and fastener applications where broad fluid resistance is required.
2 SKUs
AIR + FLUID
WATER-BASED
483 White
Thread sealant that maintains an effective seal even after re-insertion.
Picking by service condition.
If your print calls for a sealing condition but not a brand, this is where to start. Send the spec and we’ll confirm the match.
SERVICE
WHEN IT’S RIGHT
USE CASES
FIRST-CHOICE PICKS
300°F
Standard fluid & gas sealing
Reusable, non-curing seal for tapered or straight threads up to 300°F. Survives normal vibration and thermal cycling; disassembles clean in the field.
Fuel-system fasteners · hydraulic & pneumatic fittings · general industrial assemblies.
Vibra-Seal 503 / 503HV (white) · 516 / 517 (orange)
350°F / NSF
High-temperature / NSF
High-temperature sealing to 350°F. NSF approved and flow-coatable — the right answer for plumbing-line and food-equipment fasteners where potable-water compliance is required.
Cooling systems · high-temp fluid lines · NSF-listed plumbing & food equipment.
Dri-Seal 513 White · Dri-Seal 513HV White
FLUID SEAL
Broad fluid resistance
Water-based sealing against air, hydraulic, LP gas, and most other fluids. Versatile general-purpose option across mixed-fluid industrial fitting work.
Air lines · hydraulic fittings · mixed-service industrial fasteners.
Everseal 183 Blue · Everseal 483 White
Send us the OEM spec.
Most prints reference an OEM material spec, not a product name. We’ve cross-referenced thousands of specs against this catalog — send what’s on your drawing, and we’ll come back with the match.
FORD / GM / STELLANTIS
WSS-M material specs
GM / MS internal specs
PS / engineering standards
ISO / EATON / PARKER
ISO material standards
SAE AMS specifications
MIL-STD references
IFI / INDUSTRY / IN-HOUSE
IFI test standards
Industry-standard callouts
Customer internal specs
NOT SURE? SEND THE PRINT.
We’d rather pick the right sealant with you than ship the wrong one fast.
If you’re cross-referencing an OEM spec, balancing temperature against fluid type, or deciding between a curing and a non-curing thread seal, it’s faster to talk to the engineering desk. Most questions get an answer on the same business day.
WHEN YOU REACH OUT, INCLUDE
- Fastener / fitting size & thread — tapered (NPT) or straight, size and class.
- Service fluid — fuel, hydraulic oil, coolant, air, or other.
- Operating temperature — continuous and peak.
- OEM spec on the print, if any.
- Service profile — will the joint be disassembled in the field?
- Volume & cadence — annual qty and reorder frequency.