LCF1930 RTV Silicone Adhesive

Thermally conductive bonding and sealing for electrically insulated assemblies.

LCF1930 is a one-component RTV silicone adhesive designed for assemblies that require heat transfer, component attachment, and environmental sealing within the same joint. Its thermal conductivity of 3.0 ± 0.3 W/m·K supports conductive heat transfer between bonded surfaces, while a dielectric strength of at least 15 kV/mm provides electrical insulation.

The adhesive cures at room temperature to form a firm silicone elastomer with a hardness of 80 ± 10 Shore A and a tensile strength of ≥3.0 MPa. It combines this cured consistency with silicone elasticity to help accommodate stresses caused by thermal cycling, vibration, and mechanical shock.

LCF1930 is intended for bonding and sealing applications in electronics, automotive electronics, and industrial equipment. Weather resistance and a specified operating temperature range of −60°C to +200°C support use under varying environmental conditions.

Technical Specifications

	Test Items	Unit	LCF1930	Test Standard
Before curing	Appearance	-	White/Paste	Visual
	Density	g/cm3	3.0±0.1	ASTM D792
	Extrusion rate	g/min	>100	φ3.18mm/0.62MPa
	Surface Drying Time(25℃)	min	5-20	ASTM D2377
	Full cure time	d	3-7	-
	Curing type	-	Single-component, methanol-releasing type	-
After curing	Tensile strength	MPa	≥3.0	ASTM D412
	Elongation at break	%	>20	ASTM D412
	Hardness	Shore A	80土10	ISO 48-4
	Shear strength	MPa	≥1.0	ISO 4587
	Thermal conductivity	W/m·K	3.0+0.3	ISO 22007-2
	Volume resistivity	Ω·cm	1×1014	ASTM D257
	Breakdown voltage	KV/mm	≥15	ASTM D149
	Operating Temperature	℃	-60~200	-
	Flame Rating	Grade	V-0	UL94

Performance Features

Heat Transfer Through the Adhesive Joint

LCF1930 provides a thermally conductive connection between joined parts. Its 3.0 ± 0.3 W/m·K thermal conductivity is relevant to assemblies where the adhesive layer forms part of the heat-transfer path.

Electrical Isolation Between Bonded Parts

The specified dielectric strength supports applications requiring an electrically insulating adhesive interface. Required insulation thickness and finished-assembly performance should be verified against the electrical design.

Firm Cured Silicone

A hardness of 80 ± 10 Shore A makes cured consistency an important selection factor. Evaluate the material against the movement allowed at the joint and the mechanical sensitivity of the bonded components.

Environmental Protection

As a silicone adhesive sealant, LCF1930 bonds mating surfaces while helping seal interfaces against moisture exposure. Its weather resistance supports applications exposed to changing ambient conditions.

One-Component Application

The formulation requires no component mixing and cures at room temperature, supporting straightforward dispensing and assembly.

Application Areas

Component-to-housing bonding: Thermally conductive attachment where a housing or support forms part of the assembly’s heat-transfer path.

Electronic module integration: Bonding components that require electrical isolation together with mechanical fixing.

Automotive electronic assemblies: Bonding and sealing modules, sensor housings, and related interfaces, subject to application qualification.

Industrial electrical equipment: Sealing and securing parts exposed to vibration, mechanical shock, and temperature variation.

Selecting a Thermally Conductive Adhesive

LCF1930 should be evaluated as part of the complete assembly. Thermal conductivity is one selection factor; bond-line thickness, bonded area, surface contact, and the surrounding thermal design also determine heat-transfer performance.

Mechanical suitability requires separate consideration. Shore A hardness describes resistance to indentation, while tensile strength describes the cured material’s resistance to tensile loading. Neither value alone establishes adhesion to a particular substrate.

Confirm substrate compatibility, surface preparation, and curing conditions through representative assembly trials. Consult the technical data sheet for processing details.

Frequently Asked Questions

Can LCF1930 replace a lower-conductivity thermal glue?

LCF1930 may be considered when a design requires a thermal glue with a specified conductivity of 3.0 W/m·K. Replacement suitability also depends on adhesion, cured hardness, bond-line geometry, and processing requirements. Validate the change in the actual assembly.

Is LCF1930 suitable for joints that need substantial movement?

LCF1930 forms an elastomer but has a specified hardness of 80 ± 10 Shore A. For joints with substantial movement, assess cured flexibility and joint geometry rather than assuming that all silicone adhesives provide the same movement capability.

What information helps determine application suitability?

Key details include substrate materials, bonded area, adhesive thickness, heat-transfer requirements, electrical insulation requirements, expected joint movement, and operating conditions.

Reliable thermal performance starts with the right materials.

With 15 years of expertise, Union Tenda provides thermal interface materials tailored to your applications—from thermal pads and gels to greases, potting compounds and phase change materials. Our in-house R&D and testing capabilities, backed by a 20,000 m² production base, support customers across electronics, AI, EVs and energy storage.

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