Name Thermoset GF-1400
Category LORD Potting & Encapsulation Materials
describe LORD ThermosetTM GF-1400 Thermal conductive silicon gap filler is a two-component system, which is used to provide good thermal conductivity for electronic applications.
Product description

describe LORD ThermosetTM GF-1400 Thermal conductive silicon gap filler is a two-component system, which is used to provide good thermal conductivity for electronic applications.

LORD ThermosetTM GF-1400 thermally conductive silicone gap filler is a two-component system designed to provide excellent thermal conductivity for electronic applications, while retaining desirable properties associated with silicones.


Features and Benefits

Low Stress – exhibits low shrinkage and stress on components as it cures.

Durable – composed of an addition-curing polydimethyl siloxane polymer that will not depolymerize when heated in confined spaces.

Environmentally Resistant – provides excellent thermal shock resistance.



Mixing – Mix Thermoset GF-1400 resin with Thermoset GF-1400 hardener at a 1:1 ratio, by weight or volume. Handheld cartridges or automatic meter/mix/dispense equipment should be used to avoid any air entrapment in the material. Manual mixing is not recommended.

Applying – Apply material using handheld cartridges or automatic meter/mix/dispense equipment.

· Handheld Cartridges

1. Load the cartridge into the applicator gun and remove the end caps.

2. Level the plungers by expelling a small amount of material to ensure both sides are level.

3. Attach mixing tip and expel a mixer’s length of material.

4. Apply material to substrate and mate the parts within the working time of the gap filler. Clamp in position until material reaches handling strength.

· Meter/Mix/Dispense Equipment

Contact your LORD representative if assistance is needed using this equipment.

Avoid applying Thermoset GF-1400 gap filler to surfaces that contain cure inhibiting ingredients, such as amines, sulfur or tin salts. If bonding surface is in question, apply a test patch of Thermoset GF-1400 gap filler to the surface and allow it to set for the normal cure time. A liquid layer of silicone will remain on the surface if an inhibitor is present.

Typical Properties*

Typical Cured Properties**

Curing – Allow material to cure for 24 hours at room temperature (25°C) or for 60 minutes at 100°C. This time-at-temperature profile refers to the time the material should be allowed to cure once it reaches the target temperature. Allowance should be made for oven ramp rates, parts with large thermal mass and other circumstances that may delay material reaching the target temperature.

Shelf Life/Storage

Shelf life of each component is three months from date of manufacture when stored at 25°C in original, unopened container.

Thermoset GF-1400 gap filler evolves minute quantities of hydrogen gas. Do not repackage or store material in unvented containers. Adequately ventilate work area to prevent the accumulation of gas.

Cautionary Information

Before using this or any LORD product, refer to the Safety Data Sheet (SDS) and label for safe use and handling instructions.

For industrial/commercial use only. Must be applied by trained personnel only. Not to be used in household applications. Not for consumer use.

What is a Structural Adhesive?

A structural adhesive is designed to cure into a material capable of securely bonding two or more substrates, withstanding the forces encountered throughout the product's lifespan. Often referred to as "load-bearing" adhesives, they maintain their bond integrity under conditions such as shock, vibration, chemical exposure, temperature variations, and other potentially damaging factors. These substrates can vary widely, encompassing metals, plastics, glass, rubbers, ceramics, and composites. The adhesive must sustain constant or intermittent loads and shocks without compromising the bond.

Types of adhesives suitable for structural applications include epoxies, methacrylates, UV curing adhesives, polyurethanes, and cyanoacrylate adhesives (CAs).

While not typically classified as structural adhesives, other adhesive types can also perform structural roles. Pressure-sensitive adhesives, like those used in masking tapes and Post-it® notes, have successfully been employed in structural applications. Anaerobic adhesives, such as threadlockers, are primarily used to secure fasteners and are designed to be reversible upon disassembly. However, there are instances where anaerobic curing mechanisms have been adapted for structural bonding.

Sealants, which are primarily used to fill gaps and prevent liquid ingress or contamination, can also exhibit strong adhesion properties. Silicone sealants, for example, are well-regarded for their sealing capabilities but can also function as structural adhesives in specific applications, such as in the assembly of fish tanks.

This adaptation and versatility allow American Fairfield to offer a range of adhesive solutions that meet diverse structural bonding needs across various industries and applications.

Epoxy Adhesive

Wide Material Compatibility: Bonds effectively to metals, plastics, glass, ceramics, wood, engineered thermoplastics, and thermoset laminates like SMC and GRP.

High Strength Performance: Provides excellent tensile, compressive, and lap shear strength, ensuring durable load-bearing joints.

Versatile Applications: Ideal for auto body panel bonding and as an automotive structural adhesive due to its vibration-resistant and tough bond properties.

Environmental and Chemical Resistance: Resistant to thermal cycling, static discharge, galvanic corrosion, humidity, salt water, fungus, and harsh chemicals.

Electrical Insulation: Offers excellent electrical insulating characteristics, suitable for potting electronics and protecting against static discharge.

Application Flexibility: Smooth, non-sagging, and thixotropic consistency allows for easy vertical application and gap filling.

Mixing and Curing: Features a 1:1 mix ratio, with a 30-minute working time and a cure time of 48 hours at room temperature or 1.5 hours at elevated temperatures (65 °C / 149 °F).

Specialty Versions Available: Variants include flame retardant (9200FR), 1-part adhesive (9310), electrically conductive, and thermally conductive options.

Acrylic Adhesive

Strong Bonds Across Substrates: Acrylic adhesives form robust bonds between a wide range of materials including metals, plastics, and composites.

Rapid Strength Development: These adhesives offer fast curing times, ideal for applications requiring quick assembly.

Special Properties: Options include UV resistance, high temperature resistance, and flexibility to meet specific application needs.

Cost and Time Savings: Replace traditional methods like welding, reducing assembly time and labor costs by up to 50%.

Ease of Application: Available in liquid or paste forms, suitable for various application methods including automated dispensing.

Environmental Resistance: Acrylic adhesives are highly resistant to environmental factors such as moisture and chemicals.

Urethane Adhesive

Versatile Bonding: Bonds metals, plastics, SMC, FRP, laminates, stone, glass, ceramic, leather, fabric, foam, and wood.

Performance: Offers excellent impact resistance, high shear and peel strength, and good impact performance.

Quick Application: Fast gel time of 4 minutes at 25°C, with full cure in 24 hours at 25°C.

Temperature Range: Serviceable from -32 to 200°F (-40 to 93°C), suitable for diverse environmental conditions.

Form and Use: Beige liquid in a 3.5 g foil pouch, easy to apply by mixing parts A and B thoroughly.

Application Instructions: Dispense, mix thoroughly, and apply as per the Technical Data Sheet for optimal results.

Overview of Structural Adhesives

These structural adhesives offer versatile bonding capabilities across a wide array of materials, including metals, plastics, composites, ceramics, wood, and more. They provide exceptional performance with features like high impact resistance, strong shear and peel strength, and quick application times—gelling in just 4 minutes at 25°C and fully curing within 24 hours. With a service temperature range from -32 to 200°F (-40 to 93°C), they are suited for diverse environmental conditions. Available in liquid or paste forms, they cater to various application methods and offer special properties such as UV resistance, high temperature resistance, and flexibility, meeting specific needs across industries from automotive to electronics. These adhesives not only ensure robust bonds but also contribute to cost and time savings by replacing traditional assembly methods while offering excellent environmental and chemical resistance, electrical insulation, and ease of application across different substrates.