Rubberflex SI is a silicone rubber compound that is made to suit specific customer requirements. Rubberflex SI exhibits excellent resistance against ozone and weathering, good temperature resistance and mineral oils and fuel.

Rubberflex SI only applied using the hot vulcanized system or supplied in sheet form for gaskets and associated components. In the uncured form, it is applied to abrasive blasted components in accordance with BS6374:Part 5:1985.

Cured hardness is compounded to customer requirements, although 40, 60 and 80A Shore A is generally kept as standard for roller lining applications.


product Rubberflex SI
polymer Silicone Rubber
colour Customer Requirement
durometer 60+/-5 (ASTM D2240 Scale ‘A’)
tensile strength 5.5 MPa (ASTM D412 method A)
elongation @ break 250% (ASTM D412 method A)
specific gravity 1.17
temperature range Max 230˚C (Cured)
curing method Steam Cure Autoclave
NB. All results based upon laboratory cured samples, specification subject to change without notice.


Typical applications for these lining systems are:
  • roller lining
  • moulded components – small volume
  • heated clamp bars