Product Description
AFLAS ® Is the tradename for a unique fluoroelastomer based upon an alternating copolymer of tetrafluoroethylene and propylene ("TFE/P"). AFLAS, when properly formulated, can be used to fabricate o-rings, gaskets, and seals possessing several unique properties:
1) excellent heat resistance with 230° C continuous service temp capability,
2) chemical resistance including resistance to strong acids and caustics / bases,
3) high electrical resistivity, and
4) excellent oil resistance


Our company specialized in producing all kinds of perfluoroelastomer and special synthetic rubber seals (including material FKM/viton, Viton A, Viton B, Viton F, Viton GF, GLT, ETP, ACM, AEM, VMQ, NR, SBR, BR, NBR, HNBR, EPDM, CR, IIR, PU, ECO, Viton AED, FVMQ, FEPM / Aflas ), O rings, customize rubber seals, Oil & Gas Seals, chemical seals, Valves and Pump seals, Automotive rubber products,
When searching for a chemical resistant o-ring, gasket, or seal, the most successful elastomers will be in the class of fluorocarbon rubbers. Several characteristics of fluorocarbon rubber tend to impart the characteristics necessary for chemical resistance, specifically,

The ratio of fluorine to hydrogen,
The inherent strength of the carbon-fluorine bond,
The absence of carbon bond unsaturation, and
The steric hindrance associated with fluorinated structures.

Chemical resistant o-rings, gaskets, and seals for chemical processing industriy for long term service. As a general rule, the higher the fluorine content, the broader the chemical resistance. However, there are exceptions to this rule that can be attributable to the solubility parameter of a given reagent and the elastomer designated to seal the reagent. Consideration must also be given to the curative employed within the fluorocarbon rubber.
The second rule of thumb is that the higher the fluorine content, the more expensive the polymer will be. But again, exceptions exist. For instance, a Type 2 FKM (such as Viton ® B) possesses a higher Fluorine content than an Aflas ® FEPM, yet the FKM costs less. Generally speaking, FKMs will be the least expensive fluorocarbon elastomer, followed by FEPM, with the most expensive being FFKM.

Good background information on Fluorocarbon Elastomers can be found in our Technical Papers Online page. For information on base resistance you may want to visit our statement about walle sealings