Heat-Activated
Sealants

Sealing Without Compromises

L&L Seal Heat-Activated Sealants are used for filling and sealing complex cavities to prevent the intrusion of water, air, dust, and fumes and to improve acoustic performance. The materials are applied prior to the E-coat process, foaming and curing in the E-coat oven to fill and seal cavities in automobile frames.

Offered in multiple forms, our lightweight Heat-Activated Sealants are engineered to meet specific customer needs such as activation under various time-temperature profiles, adhesion to different substrates, and resistance to certain environmental exposure conditions.

Custom-Engineered Solutions

Dry-to-touch sealants can be an efficient and economical alternative to messy pastes and liquids.

Seals cavities to prevent the intrusion of water,
air, dust, or fumes.

Can be configured for Noise, Vibration, and Harshness (NVH) improvement.

Simple integration into existing manufacturing processes and bake cycles.

Well suited for use with complex cavity geometries.

Can be configured for anti-flutter applications.

Discover

Superior Adhesion

Superior green (uncured) adhesion of pressure-sensitive adhesives to a wide range of substrates
- Adheres to oily vertical surfaces and remains in place during curing
Excellent adhesion after cure
- Seals and protects from rust and corrosion
- Prevents intrusion of water, dust, gases, noise, and fumes

Design Flexibility

High expansion (0% - 2,000%)
- Gap-jumping capabilities to bridge varying design gaps
- Suitable for large and small cavities
Custom engineering
- Various forms: molded parts, PSA, extruded parts, die-cut parts, extrusion-in-place (XiP™) materials

Process Optimization

Pressure-sensitive adhesives
- Ideal for temporary fixation prior to heat activation
- Easy handling and manual application
- Reduces waste and messy cleanup
- No tools required for application
XiP™ parts
- Fully automated with high repeatability
- No waste from purging
- Dry to touch
Molded parts
- Integral clips or weld tabs
- Easy integration into OEM assembly processes
- No tools required for application

Solutions

Our custom-engineered solutions are designed to meet the unique needs of each application, including activation under various time-temperature profiles, adhesion to different substrates, and resistance to certain environmental exposure conditions.

Injection-Molded Parts

Foamable sealant material combined with nylon carrier for three-dimensional cross-sections for a variety of sealing applications
Capable of precise location sealing
Available with optional clips and a variety of expansion rates

Co-Extruded Parts

Expanding sealant extruded around nylon carrier core, cut to width
Ideal for narrow cavities sealing
Ideal for precise location sealing
Extruded parts with integral attachment
Low tooling costs compared to injection molding
Ideal for high-volume applications

Die-Cut / Assembled Parts

Expanding sealant material
Low tooling cost
For large and small complex cross-sections

Extrude in Place (XIP sealants)

XIP™ is the process of extruding and applying a dry-to-touch L&L sealant material to a metal substrate that is part of the vehicle construction using an automated robotic system.

Tapes

Extruded Pressure-Sensitive Foaming Tapes.

Excellent adhesion and highly flexible
Low or no tooling cost
Custom dimensions for different cavity sizes
Range of volumetric expansion rates available (up to 1,200%)
Weld-through version available

Resources

Download our resources to find out more on how our Heat Activated Sealants can be tailored to your needs to prevent the intrusion of water, air, dust, and fumes and to improve acoustic performance.

Interested in our Solutions?

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