Adhesive & Sealant Industry News

New Silicone Liquid Gasketing for Automotive Electronic Components

Henkel has developed an innovative solution for silicone liquid gasketing for the next generation of automotive electronic components to meet the ever growing demand in electrification and autonomy-based applications.

Loctite SI 5972FC is a one-part RTV silicone form-in-place-gasket (FIPG) solution that accelerates the process of electronic module sealing. The company reports the new product is a highly dispensable liquid silicone material specifically designed to pass OEM’s leak or blow-out pressure tests immediately after assembly – minimizing the need for time- and space-intensive staging. With its tin-free catalyst system, Loctite SI 5972FC also provides a REACH-compliant solution for safer, more sustainable manufacturing.

Module sealing is an essential final stage in the assembly process. While liquid silicone gasketing solutions have proved a versatile option that can address multiple configurations without the inventory challenges and manual assembly required by traditional rubber O-rings, the room temperature vulcanization (RTV) curing process can be time consuming. To meet stringent OEM pressure testing, post assembly staging to achieve a full cure can take several days. This not only prolongs cycle times but also consumes precious floor space in the manufacturing environment.

Henkel reports that Loctite SI 5972FC can pass a 3-psi leak test immediately after assembly. Even higher leak test pressures can also be passed in relatively short periods. In addition, the material’s non-corrosive outgassing and low volatility (D4-D10 <0.1%) makes it ideal for sensitive electronic components. Recommended applications include Electronic Control Units (ECU), Bussed Electric Centers (BEC), Battery Disconnect Units (BDU), Electrical Power Steering (EPS) Power Packs, and ADAS (Radar) components.  

“Today, it is vital to fully understand the impact of materials used in a component – whether this relates to the impact on manufacturing efficiency or the risks to human or environmental safety. Loctite SI 5972FC has been created to help manufacturers address this spectrum of challenges,” explains Arthur C. Ackerman, Business Development Manager Automotive Electronics at Henkel.

Through its tin-free catalyst and alkoxy curing system, this 1-component dispensable silicone material provides a REACH compliant approach to sealing electronics. By avoiding the need for curing ovens, Loctite SI 5972FC also helps manufacturers reduce energy usage and carbon emissions.

Source: Henkel