SealTek is a pre-applied process which adheres a line of acrylic-based sealing materials manufactured by ND Industries to the underhead of fasteners. SealTek processed fasteners negate the need for additional O-rings, gaskets, or sealing washers. When the fastener is installed, SealTek conforms to surface dimensions and fills voids between mating parts, forming a robust seal.

How it Works

During the SealTek pre-application process, ND Industries precisely dispenses then heat or UV cures the selected material onto customer provided fasteners. The result is a self-sealing fastener which is dry to the touch and ready for immediate installation. SealTek processing is compatible with a wide variety of parts for use in functions such as:
• Cushioning • Insulating • Masking • Sealing • Trimming • Controlling Noise • Reducing Vibration

Pre-Applied Process Features

Advanced Sealing

SealTek processed fasteners provide an immediate positive seal of up to 500 psi which eliminates leaks while filling voids between mating parts.


Pre-Applied SealTek is compatible with ferrous and non-ferrous metals including a wide range of common fastener finishes.


Unlike O-rings and nylon washers which are difficult to seat, tear easily and lose integrity when nicked or cut, SealTek processed fasteners are easy to seat and perform consistently.

Environmental Resistance

Materials pre-applied with the SealTek processing offer weatherability and dielectric strength while providing excellent fire, chemical, abrasion, UV, and ozone resistance.

Chemical Resistant

SealTek’s pre-application process creates three dimensional cross-linked materials which resist a wide variety of chemicals including gasoline, oil, diesel fuel, alcohol, kerosene, and hydraulic fluids.

Long Shelf Life

The materials selected for Pre-Applied SealTek exhibit an extended shelf life and will not dry or shrink with exposure to the environment.

Pre-Applied Benefits

  • Saves Time: Pre-Applied SealTek fasteners can be automatically fed through standard feeding devices – speeding up your process and improving productivity.
  • Saves Money: The Pre-Applied SealTek process is less expensive than other underhead fastener sealing methods. It also eliminates the need for costly O-rings and nylon washers.
  • Quality Control: Pre-Applied SealTek coats fasteners to specification, insuring measurable and consistent performance.
  • Reusable: SealTek processed fasteners are removable and reusable.
  • Corrosion Resistance: The materials used in the Pre-Applied SealTek process isolate dissimilar metals which helps to reduce galvanic corrosion.


  • Coated fasteners should be stored at 22±4°C and relative humidity of <50% prior to installation in final assembly.
  • Sealtek AEM is inert and will not degrade when stored under these storage conditions.

Sealtek Competes With

  • Nylok® NYSEAL®
  • Anochrome Group® Rimlex®
  • omniTECHNIK® Precote® 200

Nylok®and Nyseal® are registered trademarks of Nylok LLC, USA. Omnitechnik® and Precote® are registered trademarks of Omnitechnik, Mikroverkapselungs GMBH LLC, Germany.

SealTek Applications

Pipe Plugs, Engine Applications, Gasket Applications

Compatible Fasteners

External Threads:Internal Threads:Rivets:
Banjo Bolts, Hex Bolts, Flange Bolts, Wheel Bolts, Machine Screws, Cap Screws, Wood Screws, Sheet Metal Screws, Self Drilling Screws, Shoulder Bolts, Tube Nuts, Press-In Captive Studs, Carriage Bolts, Lag Bolts, Eye Bolts, Eye Lags, J-Bolts, U-Bolts, Elevator Bolts, Hangar Bolts, Perforated Base Studs, Through Hole Weld Studs.
N/ABlind Rivets, Break Stem Open Rivets, Closed-End Rivets, Easy-Entry Rivets, Grip Tite™ Rivets, High-Retention Rivets, High-Strength Rivets, Load Spreading Rivets (lsr), Micro Rivets, Multi-Grip Rivets (mgr), Open-End Rivets, Pull-Thru Rivets, Soft-Set Rivets, Tri-Fold Rivets, Ultra-Grip Rivets, Vgrip® Rivets, Grooved Rivets, Peel Rivets, Steel T Rivets, TVD Rivets, Interlock Rivets, Klik-Lok Rivets, Bulbing Rivets, Domed and Flat Head Solid Rivets, Low-Profile Domed Head Solid Rivets, Countersunk Head Solid Rivets, Mil. Spec Solid Rivets.

Don’t see your parts on this list? We process thousands of different types of fasteners and depending on the quantity will gladly look at whether we can accommodate yours as well.

Technical Data

MaterialColorTextureShore 00Shore AShore DFeaturesApplications
SealTek AEMBlue / BlackFirm60 - 7020 - 30Highest fluid resistance grade. Thicker coatings.Underhead sealing in engine, transmission, and brake and cooling systems.
SealTek 1120Blue / GreenSoft40 - 50 Medium viscosity for easier processing.Underhead sealing in engine, transmission, and brake and cooling systems.
SealTek GPBlue / YellowVery Soft8530Low viscosity.Replacement for plastisol sealant on pop rivets and aluminium rivets. Rivet retention device.

Approved Specifications

SealTek processed parts meets or exceed the performance requirements of the following specifications and/or standards:

Spec ForSpec NumberND ProcessND Material
General Motorsn/aSealtekSealTek 1120

Safety, Technical & Pre-Applied Data Sheets

Process NameMaterialSafety Data Sheet (Applied)Technical Data Sheet (Applied)Process Data Sheet
SealTekAEMSealTek AEM - TDS (Applied)Sealtek - PDS
SealTekGPSealtek - PDS
SealTek1120ND3548SealTek 1120 - TDS (Applied)Sealtek - PDS
SealTek1150Sealtek - PDS
Increase product quality while saving time and money with Pre-Applied adhesives and sealants.