PORON® Nomenclature

Rogers Corporation’s PORON® is a microcellular open celled urethane foam with superior compression set resistance. It has long lasting spring force, low outgassing, is flame retardant, and can be used in a broad range of temperatures. PORON® is engineered for a variety of applications and offers high performance and sealing reliability.

Seal & Design is a Rogers Corporation Preferred Converter; we turn the PORON® raw material into any shape your application demands.

Here’s how to read a PORON® part number:

poron-nomenclature   4701 =  Market Prefix

   40     =  Formulation

   15     =  Density

   188   =  Thickness

   04     =  Color

Market Prefix 4701 – All Purpose
Formulation Series 30 – Very Soft
40 – Soft
50 – Firm
60 – Very Firm
Density 15 – 30 pcf
Thickness 17 – 500 mils
Color 04 – Black

Contact Seal & Design (info@sealanddesign.com) today for help selecting a PORON® material for your application.

Rogers Preferred Converter

rogers-corp-logoSeal and Design has been awarded Preferred Converter status with Rogers Corp. Rogers Corporation Manufactures Poron and Bisco foam products.

Poron Microcellular Urethane foams offer a broad range of design solutions for gasketing, sealing and energy absorption. Low compression set and low outgassing features make these foams ideal for applications in communications, automotive, electronic, and other industrial devices.  The Bisco line of cellular silicone foam features the resistance to extreme temperatures and resilience required in many types of sealing, cushioning, insulation and vibration isolation applications. These materials are available in six different varieties, from ultra soft to extra firm.

Please contact Seal & Design’s sales staff for assistance with your application.

Bonded Seals

bonded-sealsBonded Seals are seals that are used to seal off potential leak paths on the shoulder of fasteners – such as bolts.  Seal & Design’s bonded seals are designed so that after tightening down the fastener in the assembly, the rubber of the seal will be compressed to the predetermined amount which will cause it to seal the clearance gap between the fastener and the mating components. Bonded Seals are intended to take the place of an o-ring in certain assemblies.

By using a Bonded Seal there is no need to have an o-ring groove machined into the component that the fastener will pass through. The seals are typically either a buna or viton elastomer with a cadmium plated carbon steel washer.  Please view our new webpage for standard sizes, and contact Seal & Design sales for special sizes and materials.

Peek high performance plastic


PolyEtherEther-Ketone, or PEEK, is a high performance thermoplastic material that offers chemical and water resistant properties to seals. Peek seals are manufactured with peek material, and operate at much higher temperatures than other seals.  Seal & Design peek seals can be used consistently to a temperature of 500F without losing any physical properties, and since they are made with thermoplastic materials, they can be heated, cooled, and heated again without degradation. When high temperature and high pressure demand a high performance thermoplastic seal, peek seals meet the needs of various applications. A low co-efficient of friction, and a high wear resistance without lubricants, peek seals are insoluble in solvents such as oils, salts, and acids. Since the properties and materials that peek seals are manufactured from are important to their performance, peek seal materials must resist hardening, and maintain a long service life.

Seal & Design can provide custom peek seals that ensure optimal fluid control while eliminating leakage of your specific products. Our seals are engineered for static and dynamic applications and we utilize the latest research, technologies, and finest materials to provide our customers with optimum performance during demanding application conditions. Our peek sealing products include o-rings, lip seals, piston rings, wipers, and wear rings.

Aflas O-rings and Gaskets


As a copolymer of tetrafluoroethylene (TFE) and propylene (P), TFE/P provides a unique combination of chemical, heat, and electrical resistance. Chemically, TFE/P resists both acids and bases, as well as steam, amine-based corrosion inhibitors, hydraulic fluids, alcohol, and petroleum fluids. TFE/P is also resistant to ozone and weather. TFE/P typically retains its remarkable chemical resistance even in high temperatures (up to 450° F / 232° C), and tests have shown that electrical resistance actually improves with heat exposure.

The first TFE/P compound to be commercially marketed was Aflas. In a sense, Aflas defined the initial boundaries for base-resistant materials. There are varying grades of Aflas, each with their own molecular weight. Most molded and extruded products are made from Aflas 150P, which has a molecular weight of about 130,000. In comparison, Aflas 100H has a molecular weight of 200,000 and is typically used where high pressures are to be sealed, such as in oil field applications. TFE/P compounds are also widely used in the chemical processing, automotive, and aerospace industries.

Durlon 9000® gasket material

DURLON® 9000/9000N is used extensively in chemical, pulp and paper, food and beverage and the railroad tankcar industries.It has been tested and approved for liquid chlorine, caustics, liquid oxygen, and high purity applications in the pharmaceutical industry (9000N, blood components manufacturing).DURLON® 9000 and 9000N are designed for applications where resistance to highly aggressive chemicals is required. Available in unpigmented white as style 9000N. Both styles 9000 and 9000N, (including branding) conform to FDA requirements.

DURLON® 9000 has been proven through the “Test Protocol” of the Chlorine Institute and is listed as an acceptable gasket material for Dry Chlorine service (both liquid and gaseous) in Pamphlet 95, Edition 3 of the Chlorine Institute. Additionally, DURLON® 9000 was independently tested and approved for Caustics service by a major chemical/chlorine manufacturer. Unlike generic glass fiber filled PTFE, the shape of the fillers used in DURLON® 9000 do not allow wicking which can cause corrosion on flange faces.