This material is the vulcanized product of the juice of the Hevea tree (latex).
Key Uses: Seals in food and beverage applications. Most popular material for non-hydraulic sealing applications. Mainly used for dampeners due to its ability to absorb vibration.
High tensile strength, high resilience, high abrasion and high tear resistance properties, with a good friction surface and excellent adhesion to metals. Until the invention of synthetic elastomers in the 1930’s, this material was the only polymer available for O-ring manufacture. Natural Rubber features good resistance to organic acids and alcohols, with moderate resistance to aldehydes.
General specifications (actual specifications may vary)
ASTM D1418 Designation
- NR
Standard Colour
- Black
Not widely used in sealing industry due to poor compression set performance and lack of resistance to many fluids.