Seals and Gasket Material Shelf Life

Maximum (Up to 20 Years)
Type of Rubber Common or Trader Name ASTM D141S Abbreviation ASTM D2000 Designation MIL-STD-417
Silicone Silicone Q FE TA
Fluorosiltcone Silastic LS FVMO FK TA
Polysulfide Thickol T EK SA
Florocarbons Flurel. Won* FKM HK  
Polyacrylale Acrylic ACM. ANM DF. DH TB


Average (5 to 10 years)
Type of Rubber Common or Trader Name ASTM D141S Abbreviation ASTM D2000 Designation MIL-STD-417
Chlorosulfonated polyethylene Isobutylene/ Hypalon" CSM CE  
Isoprene Butyl MR AA, BA RS
Polypropylene Neoprene CR BC, BE SC
Polyether Urethane Urethanane EU EG  
Polypropylene Oxide Propylene oxide GPOO    
Ethylene/propylene diene Ethylene propylene terpolymer EPDM BA,CA ...
Ethylene/propylene copolymer Ethylene propylene EPM BA,CA ...
Epichlorohydrin homopolymer Hydrin 100, Herclor H CO    
Epichlorohydrin ethylene oxide Hydrin 200, Herclor C ECO ... ...


Minimum (2 to 5 Years)
Type of Rubber Common or Trader Name ASTM DM13 Abbreviation ASTM D2000 Designation MIL-STD-417
Butadiene/acrylonitrile¹ Nitrite. NBR NBR BF. BG. BK. CH SB
Butadiene/styrene SBR SBR AA. BA RS
Cis-potyisoprene Butadiene BR AA RN
Cis 1, 4, polyisoprene Natural, pale crepe NR AA RN
Cis 1, 4, polyisoprene Synthetic natural IR AA RN
Polyester urethane Urethane AU ... ...
' NBR. when compounded for O-ring seals, may have a shelf life as high as 10 years when aging resistance requirements are specified in the specification.



About Monroe


Over 60 years of manufacturing experience to best serve our customers



Monroe provides custom manufacturing solutions to clients throughout the world


Value Adds

Our knowledge, customer service & processes are structured to reduce delivery times, improve quality & cut costs



Monroe is committed to customer satisfaction, we strive for continuous improvement in our products and our people.


The information contained in this website is for general information purposes only. The information is provided by Monroe Engineering, LLC, Inc. (Monroe) and while we endeavour to keep the information up-to-date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk. All users should evaluate product suitability for each intended application of that product under actual use conditions. In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from this information.

How can we help? Submit an RFQ