3M™ Dyneon™ Fluoroelastomer FE 5621

Excellent Mold Release and Improved Cure Technology
3M™ Dyneon™ Fluoroelastomer FE 5621 offers excellent mold release, meaning it can be used in automated injection molding equipment. Additionally, it features an improved proprietary incorporated cure technology that results in a more consistent part size from successive molding cycles.


Dyneon fluoroelastomer FE 5621 can be compounded using standard water cooled internal mixers or two roll mills with standard fillers and ingredients utilized in typical FKM formulations. The dry ingredients should be blended before adding to the masticated gum. For best results, FE 5621 should be banded on the mill prior to adding the blended dry ingredients. Once mixed, the compounded stocks have good scorch resistance and storage stability.

Different Quantities to Meet the Needs of the Job
Dyneon fluoroelastomer FE 5621 is packaged in slab form and is available in a returnable bulk shipping container system for 1,320 Ibs (600 kg) of material. The bulk container system is comprised of 48 individual polyethylene bags containing 27.5 Ibs (12.5 kg) of product. Smaller quantities are available in 55.1 Ib (25.0 kg) boxes.

Delivering Custom Solutions
3M offers over 50 grades of fluoroelastomers with varying monomer composition, Mooney viscosity and fluorine content. This broad offering, combined with our expertise in application and product development, translates into greater design flexibility.


For decades, we have been able to supply unique solutions to meet the increasing market challenges in developing and producing state of the art fluoroelastomer products at the highest quality level. This goes hand in hand with our unparalleled commitment to research and customer support. Like all of our products, 3M™ Dyneon™ Fluoroelastomer FE 5621 is backed by skilled researchers at several 3M tech service laboratories. Collectively, our staff has decades of experience researching, developing and improving upon fluoroelastomers. Toward that end, we are in regular communication with customers who deliver feedback – allowing us to improve existing products and deliver custom solutions. All of this is part of an unrelenting drive to deliver top products to our customers. From coatings to calendered sheets, tubing to molded goods, 3M has a solution for your specialty application.

Recommended Applications

• Injection molding


• Transfer molding


• Extrusion


• Calendering