SealTek products are acrylic-based sealing materials pre-applied by ND Industries to the underhead of fasteners. SealTek products replace the need for the assembly of O-rings, gaskets, or sealing washers. When the fastener is installed, SealTek conforms to surface dimensions and fills the voids between mating parts, forming a robust seal.

How it Works

During the pre-application process, ND Industries precisely dispenses SealTek onto parts and then heat or UV cures the material in place. The resulting product is dry to the touch and ready for immediate installation. SealTek can be applied to a wide variety of parts for use in functions such as: • Cushioning • Insulating • Masking • Sealing • Trimming • Controlling Noise • Reducing Vibration


Advanced Sealing

SealTek products provide an immediate positive seal of up to 500 psi* and eliminate leaks while filling voids between mating parts.


SealTek adheres to 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 fasteners are easy to seat and perform consistently.

Environmental Resistance

SealTek offers weatherability and dielectric strength while providing excellent fire, chemical, abrasion, UV, and ozone resistance.

Chemical Resistant

SealTek’s three dimensional cross-linked structure resists a wide variety of chemicals including gasoline, oil, diesel fuel, alcohol, kerosene, and hydraulic fluids.

Long Shelf Life

SealTek products exhibit an extended shelf life and will not dry or shrink with exposure to the environment.


  • Saves Time: Fasteners coated with ND Patch can be automatically fed through standard feeding devices and require no cure time after installation.
  • Saves Money: The bulk pre-application of SealTek products to fasteners 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 fasteners are coated to specification, insuring consistent performance.
  • Reusable: Fasteners coated with SealTek are removable and reusable.
  • Corrosion Resistance: SealTek isolates dissimilar metals and helps to reduce galvanic corrosion.


  • On part shelf life is indefinite when stored at 22±4°C.
  • As with all our pre-applied products, ND Industries can apply SealTek onto your fasteners at any one of our regional service centers, or we can supply you with fasteners that contain pre-applied SealTek.

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.


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 DCure SystemFeaturesApplications
SealTek AEMBlue / BlackFirm60 - 7020 - 30UV + HeatHighest fluid resistance grade. Thicker coatings.Underhead sealing in engine, transmission, and break and cooling systems.
SealTek 1120Blue / GreenSoft40 - 50 UV or
UV + Heat
Medium viscosity for easier processing.Underhead sealing in engine, transmission, and break and cooling systems.
SealTek 1150BlueHard>9065 - 75UVLow viscosity. Better dimensional stability.Barrier to galvanic corrosion. Non-mar tips for set screws
SealTek GPBlue / YellowVery Soft8530UVLow viscosity.Replacement for plastisol sealant on pop rivets and aluminium rivets. Rivet retention device.


Particular formulations of Sealtek meet or exceed the performance requirements of the following specifications and/or standards:

Spec ForSpec NumberND ProcessND Material
General Motorsn/aSealtekSealTek 1120

Safety, Technical & Product Data Sheets

Process NameMaterialSafety Data Sheet (Applied)Technical Data Sheet (Applied)Product Data Sheet
SealTek™™AEMSealtek - PDS
SealTek™™GPSealtek - PDS
SealTek™™1120ND3548SealTek 1120 - TDS (Applied)Sealtek - PDS
SealTek™™1150Sealtek - PDS
Increase product quality while saving time and money with Pre-Applied adhesives and sealants.