Seal Material Data

ACO Pipe® sockets are fitted with EPDM seals as standard for regular drainage applications. For particularly aggressive applications, FPM and NBR seals are available. Refer to the table below to assess suitability and contact ACO.

EPDM (Ethylene Propylene Diene Monomer)
EPDM was originally developed during the 1950s for vehicle tyre applications. It reached wider applications because of its suitability for outdoor use.

FPM (Fluoroelastomer)
FPM is a fluorocarbon and the best material for resistance to hostile chemical and oil environments at normal and elevated temperatures. This material is widely used in the chemical and pharmaceutical industries, but is significantly more expensive than EPDM.

NBR (Nitrile rubber)
NBR has good water resistance, excellent chemical resistance and durability.


EPDM FPM NBR
Water Resistance Excellent Good Good
Chemical Resistance Acids
Bases
Good
Good
Excellent
Good
Excellent
Good
Solvent Resistance (20°C) Alcohol
Acetone
Benzene
Good
Good
Unsatisfactory
Good
Unsuitable
Good
Good
Unsuitable
Unsuitable
Oil Resistance ASTM Oil No. 1 @ 20°C
ASTM Oil No. 1 @ 100°C
ASTM Oil No. 3 @ 20°C
ASTM Oil No. 3 @ 100°C
Fair
Unsatisfactory
Unsatisfactory
Unsatisfactory
Excellent
150°C Excellent
Excellent
150°C Excellent
Excellent
150°C Good
Excellent
150°C Good
Fuel Resistance ASTM Fuel B @ 20°C Unsatisfactory Excellent Excellent
Resistances Oxidation
Ozone & Weathering
Excellent
Outstanding
Outstanding
Outstanding
Outstanding
Low
Heat Resistance Maximum Continuous
Maximum Intermittent
130°C
150°C
205°C
300°C
80°C
100°C
Low Temperature Resistance – 50°C – 20°C – 30°C
Gas Permeability Fairly Low Very Low Very Low
Physical Strength Good Good Good
Compression Set Resistance Good Good Good
Tear & Abrasion Resistance Good Good Good
Cost Factor (1 = low) 1 20 2