Torque Retention Isolation Sealing Solutions

TRI-Seal® introduces rigid spheres into expandable sealant materials which are used to seal interfaces where faster load retention and/or separation of dissimilar materials are important.

What is TRI-Seal®?

Torque Retention Isolation Sealing Solutions (TRI-Seal®) is engineered to provide torque retention and isolation at interfaces where load retention and/or separation of dissimilar materials is important, and robust sealing against water, air and dust intrusion is required.

TRI-Seal® is made up of non-conductive Alumina rigid spheres dispersed into L&L’s sealant materials. There are two different forms: dry-to-the touch and tacky. TRI-Seal® dry-to-the-touch requires heat to activate the expandable sealant material. TRI-Seal® tacky does not require heat and self-adheres to a mating surface. Torque retention is achieved by the clamp force between substrates being supported by the rigid Alumina spheres. The result, a unique product that is capable of torque retention, isolation, and sealing all at the same time.

L&L Seal -
Torque Retention Isolation

Read more +


The robust and lightweight sealing solution with maximum sealing coverage and anti-corrosion features.


In order to meet specific application requirements, we offer both dry and tacky solutions. For the dry to touch seal, the sealing material is thinner than the spheres to ensure the contact with the metal. For the tacky seal, a thicker seal can be achieved so that the material can flow under clamp load to ensure maximum sealing coverage.

Dry-to-the-touch TRI-Seal®
Dry-to-the-touch TRI-Seal®
  • Laser cut and sold in rolls or sheets
  • Heat bonded to a mating surface or interference fit on a bolt or stud
  • Seal material thinner than spacers to insure contact with mating panels
Tacky TRI-Seal®
Tacky TRI-Seal®
  • Rotary die-cut
  • Self-adhere to a mating surface
  • Ability to locally concentrate the rigid spacers in areas where required
  • Seal material thicker than spacers to allow flow under compression for maximum sealing coverage
  • Customized engineered option (Lock Seal) to increase slip force


With over 50 years of sealing experience, our experienced engineering team work closely with our customers to develop tailored solutions that meet their specific requirements for a wide range of applications.

Hood Hinges/Latches

Door Hinges/Strikers

Bolted/Riveted Attachments

Lift Gate/Tailgate Hinges

Dissimilar Material Interfaces


Download our resources to find out more about TRI-Seal®

Bad Nauheim, Germany, October 15-17, 2024

EuroCarBody 2024

Read more

Portland, Oregon, August 28-29, 2024

NW Materials Show

Read more

Boston, Massachusetts, September 04-05, 2024

NE Materials Show

Read more

San Diego, CA, September 09-12, 2024

CAMX 2024

Read more

September 24-25, 2024

AKT - Aachen Body Engineering Days

Read more

Detroit, Michigan, October 08-10, 2024

The Battery Show North America

Read more

Contact our Experts

Interested in our Solutions?

Our expert team looks forward to assisting you. Please provide your contact details and we’ll be in touch soon.



Our site uses cookies and similar technologies. A distinction is made between technically necessary cookies for providing the website and optional cookies, e.g. for evaluating website usage.
You can find more information about this in our Privacy Policy . There you can also adjust your preferences at any time.