Riga Rubber Pty LtdNepean Rubber & Plastics       

Riga Rubber Factory  


Rubber compounds that we use include EPDM, water potable EPDM, natural rubber, nitrile, nitrile/PVC and chloroprene (neoprene), but we also develop compounds to customer specifications.


COMPOUND SUITABILITY CHART (1 = excellent, 2 = good, 3 = fair, 4 = poor)

The Compound Suitability Chart illustrates wide range of grades for some of the main compound choices available. Please note that this list is intended to serve as a general guide only and it is by no means definitive. Please call +61 2 9623 9544 or email sales@nepean-rubber.com.au for further information.

Physical Property  EPDM   Natural   Nitrile   Neoprene 
Abrasion resistance 2 1 2 2
Compression set 3 2 2 2
Electrical strength 1 1 4 2
Impact resistance 2 1 3 2
Impermeable to gases 2 3 2 2
Oxidation 1 3 2 2
Ozone and weathering 1 4 3 2
Physical strength 2 1 2 2
Resilience 2 1 2 2
Tear strength 3 2 2 2
Water resistance 1 2 2 1













You can download Chemical Resistance Chart if you wish to explore chemical resistance of the main compound choices available. Please note that it should be used only as a guide because chemical resistance depends on many variables such as temperature, concentration, pressure, velocity, duration of exposure, aeration, stability of the fluid, etc. Thus, it is advisable to test material under actual or simulated service conditions. Please call +61 2 9623 9544 or email sales@nepean-rubber.com.au if you require further information.


              EPDM is a thermo-set material that cannot be melted and keeps its properties in a broad temperature range. It was introduced in the early sixties and over the years has found increasing use as construction material in the automotive industry, building and civil engineering.


             Natural rubber comes from a rubber tree by 'tapping' (cutting/puncturing) the bark, so that the milky sap, known as latex, can drip out. Rubber trees are native to tropical South America and until the 1870's most rubber came from Brazil. Rubber tree was then introduced to South East Asia - today world's leading producer of natural rubber.


             Nitrile is a fully synthetic rubber available in a variety of different compounds and colours. It is considered the workhorse of the rubber products of the automotive industry.
Neoprene rubber was developed in the 1930's and was used in 1952 to make the first functional wetsuit.