Robert McKeown Company, Inc.
Robert McKeown Company, Inc.
111 Chambers Brook Road
Branchburg NJ 08876
Toll Free: 1.800.631.1125
Phone: 908.218.9000
Fax: 908.218.8949
Email: sales@robertmckeown.com
Website: www.robertmckeown.com
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COHRlastic solid silicone rubber in square sheet and continuous length form has a smooth, blemish-free surface. It is available in degrees of hardness from relatively soft 30 durometer to the relatively hard 70 durometer on the Shore A scale. It is manufactured in different formulations to provide a choice of physical properties and cost considerations.

Series 300-700 COHRlastic generalpurpose molded sheet is available in thicknesses up to 1/2" and it withstands temperatures from –100 °F to +500 °F.

Series 9030 - 9070 COHRlastic is also general-purpose, but is produced in 36" wide continuous lengths for the most efficient utilization of material, minimizing waste. Standard thicknesses are 1/32", 1/16" and 1/8".Withstands temperatures from –100 °F to +500 °F. Please consult plant for availability of additional thicknesses and colors.

Series 9200 high-performance COHRlastic provides excellent tensile strength and superior tear resistance. It is tougher and more resilient than generalpurpose silicone. Standard thicknesses are 1/32", 1/16" and 1/8", and it withstands temperatures ranging from –100°F to +400 °F. A minimum thickness of .015" is available on a minimum quantity basis. Red color is standard for general-purpose goods. Black or gray can be provided on a minimum quantity basis.The 9200 series is standard in gray, but clear or red can be supplied on a minimum quantity basis. Contact plant for minimums.
Unit of Measure

Specifications

Dielectric Strength Approx.

 N/A 500 V/mil

Thermal Conductivity (Average)

 N/A 4.4 x 10-4 x (cal·cm/ºC·cm·s) 1.3 BTU i./h·ft2 ºF

Specific Heat

 N/A 0.3 BTU/lb/ºF
Linear Thermal Expansion1 N/A 1.5 x 10-4

Width/Sheet Size

 N/A 36 in

Color

 N/A Gray
Thickness2 N/A 1/16 ±.005 in1/32 ±.005 in1/8 ±.010 in3/32 ±.010 in

ZZ-R-765, Class 3b (Grade)

 N/A 50

AMS

 N/A 3347

Test Method Durometer

 N/A D2240
Durometer (Shore A ±5)3 N/A 50

Test Method Tensile Strength

 N/A D412
Tensile Strength4 N/A 1200 psi

Test Method Elongation

 N/A D412
Elongation5 N/A 600 %

Test Method Tear Strength

 N/A D624
Tear Strength6 N/A 160 ppi

Test Method Compression Set

 N/A D395
Compression Set after 70 h at 320 ºF7 N/A 30 %

Durometer Change (Points, Shore A) after Dry Heat Aging for 70 h at 437 ºF

 N/A +10

Tensile Strength Change after Dry Heat Aging for 70 h at 437 ºF

 N/A –20 %

Elongation Change after Dry Heat Aging for 70 h at 437 ºF

 N/A –30 %

Durometer Change (Points, Shore A) after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

 N/A –5

Tensile Strength Change after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

 N/A 0 %

Elongation Change after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

 N/A –5 %

Volume Change after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

 N/A +5 %
  • 1 Room temperature to +350 ºF
  • 2 Thickness 3/32 in - special order. Minimum quantities apply.
  • 3 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 4 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 5 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 6 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 7 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.