Sponge Rubber Balls



EPDM Foam, Closed Cell Sponge Rubber

Closed Cell Sponge Rubbers
Closed cell sponge rubber can be formulated into several different elastomeric materials in a
variety of densities. The most common materials are Neoprene/EPDM/SBR blend, Neoprene,
EPDM, and Silicone. Sponge rubber can be specified in low, medium, or high density
firmness’s. It is a highly flexible material that can adapt to seal almost any surface application
when used with pressure sensitive adhesives or with Heat Activated Tape Systems (HATS).
Closed cell sponge rubber, or expanded rubber, is composed of individual cells that are a lot like
balloons; they hold in gas and do not allow moisture to penetrate their walls so long as the cell
walls do not burst. The cells in closed cell sponge rubbers are not interconnecting, meaning they
do not allow air or water to wick through the sponge at low pressures.
Characteristics:
Controlled compression and recovery characteristics
Shock absorption attributes Highly effective sealing capabilities
Less flame resistant Provide better weather proofing qualities
Applications/Industries:
Medical, Construction & Packaging industries
Medical packaging Insulation
Floor underlayment Flotation devices
Anti-rattle uses Seals
Anti-skid pads Building materials

EPDM EPDM
This rubber, a copolymer of ethylene and propylene, has outstanding resistance to aging,
weathering, ozone, oxygen, and many chemicals, as well as excellent temperature stability and
steam and water resistance. EPDM also shows an excellent resistance to gas permeability and
aging due to steam exposure. It is an excellent polymer to use in high temperature applications
as it is heat resistant up to 350°F. Ethylene Propylene provides poor resistance to oil and
solvents; however it is fairly good in its resistance to ketones and alcohols. EPDM is not
recommended for usage in food applications or those that expose it to aromatic hydrocarbons.
EPDM would be one of the recommended polymers to use in a bleach application!
Characteristics:
Resistance to aging & weathering
Excellent temperature stabilities
Resistance to water
Applications/Industries:
Automotive weather stripping Glass-run channels
EPDM Grommets Automotive seals
Radiator, garden and appliance EPDM hoses
Electrical insulations and stinger covers
Roofing membranes EPDM belts
Plastic impact modification Rubber mechanical goods
Water system O rings and hoses Ozone exposure applications
Automotive cooling systems

Foam Rubber
Foam rubber is found in a wide range of applications, from cushioning in automobile seats and
furniture to insulation in walls and appliances to soles and heels in footwear. Foams are made
by forming gas bubbles in a plastic mixture, with the use of a blowing agent. Foam manufacture
is either a continuous process for making laminate or slab stock or a batch process for making
various shapes by cutting or molding. Rubber’s foam rubber products offer cost-effective sealing
and cushioning solutions.
Characteristics:
Resistance to UV, weathering, fungi and oxidation
Resistance too many solvents and chemicals
Ability to be laminated
Can be supplied with pressure sensitive adhesives
Applications/Industries:
Cushioning for furniture and automobiles
Automotive trim Chemical resistance properties for fire & burning, ultraviolet uses etc.
Shoe soling Insulations in refrigerators, freezers, buildings, transport vehicles

Natural Rubber (Gum Rubber)
Natural rubber is an elastomer that was originally derived from milky latex found in the sap of
some plants. The purified form of natural rubber is the chemical polyisoprene, which can also
be produced synthetically. Natural rubber is used extensively in many applications and products,
as is synthetic rubber. Natural rubber is an ideal polymer for dynamic or static engineering
applications. Natural rubber cannot compare with many synthetics for heat aging and resistance
to sunlight, oxygen, ozone, solvents or oil.
Characteristics:
Excellent dynamic properties with a low hysteresis loss
Good low temperature properties
Strong bonding to metal parts
High resistance to tear and abrasion
Ease of processing
Applications/Industries:
Hose and tubing Vibration isolators
Shock mounts Electrical components
Extremely resilient elastomer

Neoprene Neoprene
This rubber is a polymer of chloroprene and has several valuable properties and works well in
applications requiring resistance to gasoline, sunlight, ozone, and oxidation. Neoprene Rubber,
also known as neoprene polychloroprene, is an extremely versatile synthetic rubber with more
than 75 years of proven performance. It was the world’s first synthetic elastomer with oil
resistance and is still the primary choice in a range of applications. In the automotive world,
neoprene is used for many under hood and underbody parts that require a reasonably priced, mid-
performance polymer with a good all-around balance of performance properties.
Characteristics:
Versatile with oil resistance Sunlight & Ozone resistance
Resistance to oxidation Good all around properties
Applications/Industries:
Automotive Conveyor Belts Industrial Hoses
Construction O’Rings Grommets and vibration parts
Wire and cable Oil-resistant rubber mechanical goods

NEOPRENE/EPDM/SBR Blend Rubber NEOPRENE/EPDM/SBR Blend Rubber
Sponge rubber foams are used in applications such as gasketing and sealing.
The material is excellent for general sealing purposes, especially where resistance to moisture
absorption might be important and irregular surfaces are involved. This blended rubber is
generally more durable and suitable for higher temperature applications.
This material is an economical seal with excellent compression. This material can be used to
absorb shocks cushion, deaden sound and seal against, air moisture and light and dust
penetration. The blend of Neoprene and EPDM makes this material moderately resistant to oil
and ozone.
Characteristics:
Sponge rubber is a good water seal under low compression and will operate at intermittent
temperatures up to 250° F.
Color: Black material
Acid Resistant Good sealing qualities Deadening sound qualities
Resistance to oils and petroleum products Closed cell material
Neoprene/EPDM/SBR elastomeric blend meets ASTM D 1056-67, ASTM D 1056-85, 91, 98, 00,
MIL-R-6130C, MIL-C-3133C, MIL-STD-670B, UL157, UL50, UL508, UL94HF-1, and FMVSS-302
specifications for military and automotive applications.
Applications/Industries:
Shock and vibration cushioning Weatherproofing Automotive
HVAC uses to eliminate air leakage Electrical enclosures

Nitrile
Nitrile (NBR) provides excellent resistance to petroleum oils and gasoline as well as mineral
and vegetable oil. It also offers strong resistance to heat aging often a key advantage over
natural rubber. Nitrile rubber performs well in carburetor and fuel pump diaphragms,
aircraft hoses, seals and gaskets as well as oil-lined tubing. Due to its versatility it’s used
in applications involving not only oil and fuel resistance, but those applications requiring
resistance to heat, abrasion, water, and gas permeability.
Nitrile rubbers material properties make it an excellent solution for sealing applications. The
popularity of this material results from its excellent resistance to petroleum products and its
ability to be compounded for service of temperatures up to 250°F. With these temperature
resistances, the right nitrile rubber compounds can withstand all but the most severe automotive
applications.
Characteristics:
Excellent resistance to oils & gasoline Water resistance
Abrasion applications Good heat resistance qualities
Applications/Industries:
Oil resistant applications Low temperature applications
Automotive, marine and aircraft fuel systems Nitrile roll covers
Automotive, Marine & Aerospace

SBR
This rubber, a synthetic copolymer of styrene and butadiene, has a fair resistance to solvents
and chemicals but has excellent water resistance. SBR is a non-oil resistant, low cost material.
It displays a good resistance to water and resilience up to 70 durometer. Its compression set
becomes poorer as durometer increases. SBR rubber also provides good abrasion, wear and
tensile qualities and can be readily substituted for natural rubber in many applications with
significant cost savings. Generally, SBR proves satisfactory against most moderate chemicals
and wet or dry organic acids. It is not recommended to use SBR in applications that involve
ozone, strong acids, oils, greases, fats and most hydrocarbons. Since the material exhibits
excellent resistance to brake fluids as well as good water resistance, synthetic rubber parts are
commonly used in hydraulic brake system seals and diaphragms.
Characteristics:
Low cost Water resistance Good wear and tensile qualities
Exhibits excellent resistance to brake fluid
Applications/Industries:
Automotive Construction Plumbing
O-rings SBR rubber pads Synthetic Rubber Seals
Rubber gaskets SBR grommets
Custom molded rubber components for plumbing applications

Silicone
This rubber is a semi-organic synthetic that can be made to withstand temperatures as high as
450° F and as low as -150° F and will remain flexible and serviceable over the entire temperature
range. Silicone sheet gasket material is a very versatile material ideal for a wide range of
applications. Silicone rubber gasket material offers temperature resistance, weather (UV and
ozone) resistance, and fire resistance. Silicone gasket material has very good compression set
resistance allowing it to maintain a proper seal over many years. Silicone gasket material is
not recommended for dynamic applications due to its poor tear strength and tensile. It does not
do well with oils. Silicone rubber offers good resistance to extreme temperatures, being able
to operate normally from -100°C to +250°C. At extreme temperatures, the tensile strength,
elongation, tear strength and compression set can be far superior to conventional rubbers.
Organic rubber has a carbon to carbon backbone which can leave them susceptible to ozone, UV,
heat and other aging factors that silicone rubber can withstand well. This makes it one of the
materials of choice in many extreme environments. Silicone rubber is a highly inert material and
does not react with most chemicals.
Characteristics:
Incredible resistance to extreme temperatures
Better fire resistant properties and excellent electrical insulator compared to natural rubbers
Thermal stability making it possible that properties such as volume resistivity, dielectric strength
and power factor are not affected by changes in temperature
Applications/Industries:
Shaft sealing rings Spark plug caps
Radiator and automotive heating silicone hoses Automotive, Construction
O-rings Window and door silicone seals Expansion joints
Oven door seals and gaskets Silicone rubber tubing

Viton®
This rubber, the end product of the copolymerization of highly fluorinated olefins, is resistant
to the effects of ozone, oxygen, and sunlight and finds a unique usage in hot oil environments
where outstanding compression set is required. Viton® fluoroelastomer is well known for its
excellent resistance to aggressive fuels and chemicals, high heat (400°F/200°C), abrasions
and cuts. Viton® also offers superb mechanical properties and can meet many performance
specifications. Viton® was also the first fluoroelastomer to obtain worldwide ISO 9000
registration. Viton® is a registered trademark of DuPont Performance Elastomers.
Following its introduction in 1957 to the Aerospace industry, the usage of Viton® spread quickly
to other industries including the automotive, appliance, chemical and fluid power industries.
Viton® has a strong reputation as a high performance elastomer in very hot and extremely
corrosive environments.
Characteristics:
Resistant to fuels and chemicals Resistant to high heat
Resistant to extreme corrosive environments Superb mechanical properties
Outstanding compression abilities Resistant to effects of sunlight, oxygen & the ozone
Applications/Industries:
Fuel system seals & hoses O-rings
Shaft seals Expansion joints and gaskets
Chemical resistant gaskets High temperature Viton® gaskets
Power industries Chemical & Fluid industries