Technical Data

Silicones / Elastomers

Reiss Silicone Rubber

Chemically, silicones are quite different from all other rubber-like materials. Organic polymers are made up of a “backbone” of carbon-to-carbon atoms. These linkages are easily deteriorated by elevated temperatures and the effects of silicon and oxygen atoms. Silicones have a silicon-oxygen linkage that is the same as that found in other high-temperature materials such as quartz, glass and sand. This explains silicone’s superior high-temperature properties and their general inertness toward many deteriorating effects such as ozone, corona, weathering and radiation.

CharacteristicsASTM D2000 SAE J200AMS 3304GActual Test Data
Physical Properties
Durometer, Shore A70 ± 570 ± 571
Tensile, PSI, Minimum870650995
Elongation % Maximum150125175
Heat Age - 70 Hrs @ 125°C (257°F)
Durometer Change±10±10+4
Tensile Change, %-25-25-14.3
Elongation Change, % Maximum-30-40-18.4
Compression Set - 22 Hrs @ 175°C (347°F)
Original Deflection, % Maximum25 12.4
Compression Set - 70 Hrs @ 150°C (302°F)
Original Deflection, % Maximum 2519.4
ASTM #1 Oil - 70 Hrs @ 150°C (302°F)
Durometer Change0/-15+5/-15-7
Tensile Change, %-20-20-2.9
Elongation Change, % Maximum-20-150
Volume Change, %0/+10+15+6.4
Surface Tackiness--NoneNone
ASTM #1 Oil - 70 Hrs @ 150°C (302°F)
Durometer Change-30 -20
Volume Change, % Maximum+60 35
Water Resistance - 70 Hrs @ 100°C (212°F)
Durometer Change±5 -1
Volume Change, %±5 +2.5
Low Temperature Brittleness (ASTM D2137-A)
3 Minutes @ -55°C (-67°F)Non-brittle--Pass
3 Minutes @ -65°C (-85°F)--Non-brittlePass
Tear Resistance (Die B)

Types of Silicone Rubber Available

Reiss has all the technical capability to supply a far wider variety of silicone rubber formulations than can be outlined on our “stock” item data sheets. Most materials are available in any color or can be color matched when necessary. We invite inquiries about the following types of silicone rubber:

Type of Silicone RubberDescription
General Purpose RubberA wide variety of hardnessess designed to fulfill the greatest number of applications.
High Performance RubberA unique combination of high tensile, high tear, and resilience for harsh environments that require tough rubber.
Extreme Low Temperature RubberSilicone available with a brittle point as low as -117°C (-178°F).
Fluorosilicone RubberGeneral purpose physicals with outstanding resistance to fuels. Material cost is considerably higher than standard silicone.
Food Grade RubberRubber to be used in contact with food. All components of this rubber have been selected to comply with the FDA 21 CFR 177.2600 regulation.
High Transparency RubberFor applications requiring "see through."
Electrically Conductive RubberCompounds with general purpose physicals and with a volume resistivity of less than 10 ohm-cm are available.
Flame Retardant RubberMost silicone rubber types are available from Reiss Manufacturing, Inc. in flame retardant form.

Reiss Silicones: Design and Processing Versatility

DivisionProcedures Performed
MoldingA broad range of shapes and sizes can be produced by injection, compression and transfer molding.
ExtrudingProducts such as tubing, rods, seals, and special shapes can be produced. We offer full design services to fulfill special sealing requirements.
CalenderingWe can produce, in rolls, 12" wide solid silicone sheet as thin as .005" + .003"/-.001".
SpongeWe retain outstanding capabilities in silicone sponge. Extruded goods, flat sheets, 36" wide rolls, and molded shapes are available.
FabricationDie cutting, slitting, laminating, splicing, application of pressure sensitive adhesives and bonding of silicone rubber to various substrates (including fabrics and metals) are available.


  • At a temperature of 90°C (194°F), silicones offer 40 years of life.
  • Silicone rubber has a higher tensile strength than most organic elastomers at elevated temperatures.
  • Young’s Modulus, or ratio of stress to strain of low temperature, silicone rubber shows very little change down to -73°C (-100°F).
  • -73° C (-100°F) to 260°C (500°F) range is normal and can go from -117°C (-178°F) to 316°C (600°F).
  • When exposed to direct flame, silicone burns to a non-conducting ash.
  • Silicone rubber, when used in outdoor applications, outperforms EPDM and other organic rubber materials.
  • When properly fabricated it does not stain or corrode, it is odorless, tasteless and non-toxic.

Santoprene® Rubber

  • Temperature range is from -40°C (-40°F) to 135°C (275°F) in continuous use.
  • It has good sealing properties and compression set.
  • It has oil and chemical resistance.
  • It has good weather ability and is both ozone and UV resistant.
  • You can choose a wide range of colors.
  • Santoprene® is capable of complex profiles and is weldable.
  • It has excellent compatibility with paint and is non-staining.
  • There are a wide variety of grades available and it has the ability to be co-extruded with olefinics.
  • Santoprene® is often used as a replacement for natural rubber (NR), polyisoprene (IR), styrene-B=butadiene rubber, lower-performing ethylene propylene diene (EPDM) and other TPEs.
  • Santoprene® is used in applications that require moderate performance characteristics.
  • The basic chemical structure is EPDM (partially cross-linked).


Fluorocarbon is also known as Viton® and is a registered trademark of DuPont. Viton® is better than silicone in its resistance to a wide array of chemicals. It has a range in temperature of -29°C (-20°F) to 204°C (400°F), with intermittent exposure up to 316°C (600°F). This material is excellent against abrasion and oils and does well against ozone, weather and flame. However, it has limited use at low temperatures -20°C (-4°F) being the limit for flexibility. It is expensive and does not resist ketone solvents. Typically Viton® is used in applications requiring resistance to hostile fluids at high temperatures.

CharacteristicsASTM D2000 SAE J200Actual Test Data
Physical Properties
Durometer, Shore A75 ± 577
Tensile, PSI, Minimum14001744
Elongation % Maximum125229
Specific Gravity--1.85
Temperature Retraction, 10% Maximum+5+1
Air Age - 70 Hrs @ 270°C (518°F)
Durometer Change10/-5+2
Tensile Change, % Maximum35+5
Elongation Change, % Maximum15-8
Weight Loss, % Maximum103.9
Air Age - 22 Hrs @ 200°C (392°F)
Compression Set - % Original Deflection  
.066 to .110 inch, Maximum20 
Over .110 inch, Maximum158.56
Air Age - 336 Hrs @ 200°C (392°F)
Compression Set - % Original Deflection  
.066 to .110 inch, Maximum45 
Over .110 inch, Maximum4011.4
Oil Age - 70 Hrs @ 200°C (392°F)
Durometer Change0/-15-11
Tensile Change, % Maximum30-16
Elongation Change, % Maximum20-5
Compression Set - % Original Deflection  
.066 to .110 inch, Maximum30 
Over .110 inch, Maximum103
Volume Change, %+1/+25+17
Fuel Age - 70 Hrs @ 24°C (75°F) (Fuel B)
Durometer Change+5/-5-1
Tensile Change, % Maximum20-10
Elongation Change, % Maximum20-8
Volume Change, %0/+5+1.0

Contact us to learn more about our rubber compounds, or submit a Request for Quotation for your next project.

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