Dow introduces SILASTIC™ fluorosilicone rubber bases with optimized performance for competing demands

Dow Performance Silicones, a global leader in elastomer innovation, expertise, service and support, has developed two new fluorosilicone rubber (FSR) bases to meet competing demands for handling performance, high-temperature resistance and fluid resistance.

SILASTIC™ LS-4940 Fluorosilicone Rubber Base and SILASTIC™ LS-4960 Fluorosilicone Rubber Base are specially designed for calendering and extrusion of turbocharger hoses. They also are suitable for other molded rubber parts that will be exposed to high temperatures and/or aggressive fluids or fuels.

“With their good balance of tensile, elongation and tear resistance; low compression set; good heat stability; and high fuel resistance, these new bases are excellent choices for harsh under-the-hood automotive applications,” said Gifford Shearer, Silicone Elastomers Market Manager for Dow Performance Silicones. “Plus, they exhibit reduced stickiness when unwrapping and mill handling, making them an excellent choice from a handling perspective as well.”

In mill-handling demonstrations, SILASTIC™ LS-4940 and LS-4960 FSR Bases exhibited less stickiness and better handling than a historic SILASTIC™ FSR base.

Handling demonstration videos:

SILASTIC™ LS-4940 Fluorosilicone Rubber Base and SILASTIC™ LS-4960 Fluorosilicone Rubber Base will make their commercial debut at the International Elastomer Conference and Rubber Expo in Louisville, Kentucky, USA, October 9 through 11. Expo visitors can learn more about the new fluorosilicone bases along with other recent elastomer innovations from Dow at Booth 573.

About SILASTIC™ brand
Introduced commercially in 1945, SILASTIC™ silicone elastomers have a 70-year history of success in demanding applications where performance, reliability, safety and aesthetics are essential. Learn more at

About Dow Performance Silicones
Dow Performance Silicones, a business unit of The Dow Chemical Company, delivers a portfolio of performance-enhancing solutions to serve the diverse needs of customers and industries around the world. The business uses innovative silicon-based technology to provide solutions and ingredients to customers in commercial construction and high performance building, consumer goods, silicone elastomers, and pressure sensitive industries. As a global leader in innovation and silicone technology, we are committed to bringing new and proven solutions to the market that do more for our customers and continue to improve the lives of consumers worldwide. Visit to learn more.

About The Dow Chemical Company
The Dow Chemical Company (Dow) combines science and technology knowledge to develop premier materials science solutions that are essential to human progress. Dow has one of the strongest and broadest toolkits in the industry, with robust technology, asset integration, scale and competitive capabilities that enable it to address complex global issues. Dow’s market-driven, industry-leading portfolio of advanced materials, industrial intermediates and plastics businesses deliver a broad range of differentiated technology-based products and solutions for customers in high-growth markets such as packaging, infrastructure and consumer care. Dow is a subsidiary of DowDuPont (NYSE: DWDP), a holding company comprised of Dow and DuPont with the intent to form three strong, independent, publicly traded companies in agriculture, materials science and specialty sectors. More information can be found at

For further information contact:

Cathy Yang
Dow Performance Silicones
+1 (989) 496 6965