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The Duramax Difference
Unlike suppliers who use
SBR (Styrene Butadiene
Rubber) and other lower cost
compounds to make their
products, Duramax Marine®
Dock Bumpers and Fenders
are manufactured using only
high quality EPDM (Ethylene
Propylene-Diene-Monomer)
rubber. There is a difference.
EPDM rubber works well in all marine
conditions and environments.
Highly resistant to seawater,
steam and many chemicals.
Resistant to heavy wear & tear.
Withstands temperatures as high as
150° F and as low as -60° F.
Excellent color stability.
EPDM quality comes standard.
EPDM rubber’s outstanding properties are
unaffected by ozone, which can cause cracking
in SBR, natural rubber and butyl, particularly
under stress. EPDM also has much greater
resistance to sunlight and oxidation. When
exposed to natural elements, EPDM should
outlast other rubber compounds by a sub-
stantial margin. It can perform up to 4x longer
resulting in substantial savings on replacement
costs. Unless your Dock Bumpers and
Fenders are made from EPDM rubber, you’re
getting an inferior product.
MATERIAL: EPDM (Ethylene Propylene-Diene-Monomer)
RANGE OF SERVICE: -60° F to 150°F (continuous duty)
DUROMETER: 70±5 shore “A” scale
TENSILE STRENGTH: 2000 minimum p.s.i.
COMPRESSION RECOVERY: Instantaneous recovery of 90-95% is observed over a 20,000 to 200,000 lb.
static load on one foot sample lengths of designated cross-sections.
Samples have been compressed 70% by overall height without any damage.
IMPACT RESILIENCY: As a function of fendering cross-section, high reaction loads with large
energy absorptions have been transmitted with no damage experienced.
SHEAR STRENGTH : For rubber and rubber-like materials, average shear strength is usually
taken as 50% of tensile or compressive strength as per application.
WATER ABSORPTION: Negligible.
LIFE: Excellent for weather condition in ozone.
DIMENSIONAL TOLERANCE: ±8% on Interior Dimensions.
±4% on Exterior Dimensions.
LENGTH TOLERANCE: ±2% or 1", whichever is greater.
Physical Properties of Duramax Marine® Dock Bumpers and Fenders
www.DuramaxMarine.com