Choosing a base polymer is one of the first decisions in any rubber project. Each family has strengths and weaknesses that make it more or less suitable for a given environment.
Natural rubber (NR)
Excellent elasticity, tear strength and abrasion resistance. A good fit for soles, pads and anti-vibration parts — but limited resistance to oils, ozone and sunlight.
EPDM
Outstanding weathering, ozone and UV resistance, making it a common choice for outdoor seals and construction profiles. Not suitable for contact with oils and fuels.
Nitrile (NBR)
Good resistance to oils, greases and many fuels, which makes it a standard choice for industrial seals and gaskets. Weathering resistance is lower than EPDM.
The right answer depends on the whole application. Tell us what the part will face and we will recommend a starting compound.