| Size | Heaters | Capacity | Dia | Tons | |
|---|---|---|---|---|---|
| 32 x 32 | 34½ | 33½ x 3 | 1500 | 16 | 200 |
| 32 x 32 | 32 | 33½ x 3 | 1500 | 16 | 200 |
| 30 x 30 | 31½ | 33½ x 3 | 1500 | 16 | 200 |
| 24 x 24 | 25½ | 26 x 4 | 2000 | 14 | 150 |
| 24 x 24 | 24 | 26 x 4 | 2000 | 14 | 150 |
| 24 x 24 | 24 | 24 x 24 | 2000 | 16 | 200 |
| 24 x 24 | 24 | 26 x 4 | 2000 | 14 | 150 |
| 14 x 14 | 14 | 16 x 4 | 1000 | 7 | 40 |
| 16 x 24 | 18 | 26 x 4 | 2000 | 14 | 150 |
| 15 x 15 | 17 | 18 x 4 | 1000 | 8 | 75 @ 3,000# |
| 18 x 18 | 21 | 15 x 1½ | 500 | 10 | 75 @ 2,000# |
| 16 x 16 | 17 | 16 x 1½ | 500 | 10 | 80 |
| 16 x 16 | 17 | 16 x 1½ | 500 | 10 | 80 |
| 24 x 24 | 26 | 26 x ¾ | 1200 | 20 | 300 |
| 24 x 24 | 24 | 26 x ¾ | 1200 | 20 | 300 |
| 18 x 18 | 19 | 18 x ¾ | 750 / 1200 | 14 | 150 |
| 18 x 18 | 19 | 18 x ¾ | 750 / 1600 | 12 | 110 |
| 24 x 24 | 33½ | 24 x ¾ | 1500W 440V | 20 | 300 |
| 22 x 22 | 24 | 22 x ¾ | 1200 | 16 | 200 |
EPDM is a durable synthetic rubber made from ethylene and propylene. It is commonly used for seals, gaskets, and outdoor applications.
Natural gum rubber is made from natural isoprene and is known for its excellent elasticity and physical strength.
Viton® is a high-performance fluoroelastomer (FPM) made from hexafluoropropylene and vinylidene fluoride, designed for demanding chemical and high-temperature environments.
- Excellent oil and fuel resistance
- Strong performance at high and low temperatures
- Very good chemical resistance
- Long service life in harsh environments
| Name | Designation | Composition | Min/Max Temp (°F) | General Properties | Resistant to | Attacked by |
|---|---|---|---|---|---|---|
| Neoprene | CR | Chloroprene | -30 / 212 | Good weathering resistance, flame retarding, moderate resistance to petroleum-based fluids. | Moderate chemicals and acids, ozone, oils, fats, greases, many oils, and solvents. | Strong oxidizing acids, esters, ketones, chlorinated, aromatic, and nitro hydrocarbons. |
| EPDM | EPDM, EPM | Ethylene-propylene-diene; Ethylene-propylene | -40 / 300 | Excellent ozone, chemical aging resistance. Poor resistance to petroleum-based fluids. | Animal and vegetable oils, ozone, strong and oxidizing chemicals. | Mineral oils and solvents, aromatic hydrocarbons. |
| Buna-N | NBR | Nitrile-butadiene | -30 / 250 | Excellent resistance to petroleum-based fluids. Good physical properties. | Many hydrocarbons, fats, oils, greases, hydraulic fluids, chemicals. | Ozone (except PVC blends), ketones, esters, aldehydes, chlorinated, and nitro hydrocarbons. |
| Silicone | Q, Si | Polysiloxane | -80 / 420 | Excellent high and low temperature properties. Fair physical properties. | Moderate or oxidizing chemicals, ozone, concentrated sodium hydroxide. | Many solvents, oils, concentrated acids, dilute sodium hydroxide. |
| SBR | SBR | Styrene-butadiene | -20 / 212 | Good physical properties and abrasion resistance. Poor resistance to petroleum-based fluids. | Most moderate chemicals, wet or dry, organic acids, alcohols, ketones, aldehydes. | Ozone, strong acids, fats, oils, greases, most hydrocarbons. |
| Butyl | IIR | Isobutene-isoprene | -60 / 250 | Very good weathering resistance. Excellent dielectric properties. Low permeability to air. Good physical properties. Poor resistance to petroleum-based fluids. | Animal and vegetable fats, oils, greases, ozone, strong and oxidizing chemicals. | Petroleum, solvents, coal tar solvents, aromatic hydrocarbons. |
| Natural Gum Rubber | Isoprene, natural | -60 / 220 | Excellent physical properties including abrasion and low temperature resistance. Poor resistance to petroleum-based fluids. | Most moderate chemicals, wet or dry, organic acids, alcohols, ketones, aldehydes. | Ozone, strong acids, fats, oils, greases, most hydrocarbons. | |
| Hypalon (4) | CSM | Chloro-sulfonyl-polyethylene | -40 / 320 | Excellent ozone, weathering, and acid resistance. Good abrasion and heat resistance. Fair resistance to petroleum-based fluids. | Similar to Neoprene with improved acid resistance. | Concentrated oxidizing acids, esters, ketones, chlorinated, aromatic, and nitro hydrocarbons. |
| Urethane | AU, EU | Polyethylene-adipate, Poly (oxy-1,4-butylene) ether | -40 / 175 | Good aging and excellent abrasion, tear, and solvent resistance. Poor high temperature properties. | Ozone, hydrocarbons, moderate chemicals, fats, oils, greases. | Concentrated acids, ketones, esters, chlorinated, and nitro hydrocarbons. |
| Viton® (4), Fluoro-elastomer | FPM | Hexafluoropropylene-vinylidene fluoride | -10 / 400 | Excellent oil and air resistance both at low and high temperatures. Very good chemical resistance. | All aliphatic, aromatic, and halogenated hydrocarbons, acids, animal and vegetable oils. | Ketones, low molecular weight esters, and nitro-containing compounds. |
| Fluoro-silicone | FSi | Fluorocarbon | -60 / 350 | Offers superior heat resistance. Resistant to cold, oils, and solvents of fluorinated rubber. Good for special applications requiring general resistance to oxidizing chemicals, aromatic, and chlorinated solvent bases. Narrower temp range than silicone but better fluid resistance. | Moderate or oxidizing chemicals, ozone, aromatic chlorinated solvents, bases. | Brake fluids, hydrazine, ketones. |
| Hydrogenated Nitrile | HNBR | Hydrogenated Acrylonitrile-butadiene rubber | 2 / 300 | Excellent heat and oil resistance, improved fuel and ozone resistance (approximately 5X) over standard nitrile. Elasticity at low temperatures with hydrogenation. | Many hydrocarbons, transmission fluids, refrigerants, diluted acids, hydraulic fluids, silicone oils, vegetable and animal fats and oils, water, and steam. | Chlorinated hydrocarbons, ketones, strong acids. |
| Carboxylated Nitrile | XNBR | Carboxylated Nitrile | -20 / 250 | Excellent abrasion and tear resistance. Fair ozone and steam resistance. Poor to fair sunlight and outdoors. Good to excellent oil resistance. | Many hydrocarbons, fats, oils, greases, hydraulic fluids, chemicals. | Ozone (except PVC blends), ketones, esters, aldehydes, chlorinated, and nitro hydrocarbons. |
- Excellent resistance to ozone and weather
- Strong aging and chemical resistance
- Long service life in outdoor environments
- Excellent abrasion resistance
- Very good low-temperature flexibility
- High elasticity and tensile strength
.
Natural gum rubber is commonly used in:
- Abrasion-resistant parts
- Shock and vibration isolation
- Seals and gaskets in non-oil environments
- Applications requiring high elasticity
Yes. In many cases, Woodlawn Rubber can use your existing rubber molding tooling to manufacture parts and components.
Our engineering team evaluates your current molds for compatibility with our equipment and manufacturing processes. If modifications are needed, we provide cost-effective recommendations to maintain part quality and performance.
Using existing tooling can help reduce startup costs and shorten lead times.
If you have existing rubber mold designs, contact Woodlawn Rubber to discuss your project.
EPDM is widely used in:
- Automotive weather seals
- HVAC systems
- Roofing and construction
- Industrial sealing applications
Viton® is commonly used in:
- Seals and O-rings for oil and fuel systems
- Chemical processing equipment
- Aerospace and automotive applications
- High-temperature industrial sealing
Yes. Its excellent low-temperature performance makes it suitable for cold and flexible applications.
Transfer molding remains a popular solution for custom rubber components, especially when inserts are required.
-
Well-suited for rubber-to-metal bonded parts
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Good dimensional accuracy
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Effective for intricate part designs
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Lower tooling cost compared to some injection systems
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Reliable for medium production volumes
Potential Considerations
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More material waste due to runners and sprues
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Additional trimming may be required
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Slightly longer cycle times compared to injection based systems
Transfer molding is commonly used in industrial, automotive, and electrical applications.
Yes. With continuous performance up to 400°F, Viton® is well suited for high-heat environments.
EPDM performs well in temperatures from -40°F to 300°F.
EPDM is not recommended for use with:
- Petroleum-based oils and fuels
- Mineral oils
- Solvents and aromatic hydrocarbons
Injection compression molding offers several benefits for precision rubber manufacturing:
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Superior part consistency and repeatability
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Reduced material waste
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Improved dimensional control
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Better flash management
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Ideal for medium to high volume production
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Excellent for complex rubber components
Potential Considerations
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Higher initial tooling investment
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Advanced equipment required
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May not be ideal for very low volume production
This process is often selected for tight tolerance rubber parts and applications requiring high reliability.
Natural gum rubber is not recommended for use with:
- Petroleum-based fluids
- Ozone
- Strong acids
- Fats, oils, and greases
Most hydrocarbons
Yes. Viton® offers excellent resistance to oils, fuels, and hydrocarbons, making it ideal for automotive and industrial fluid handling.
Yes. EPDM is ideal for outdoor applications due to its outstanding weather and ozone resistance.
Natural gum rubber is resistant to:
- Most moderate chemicals (wet or dry)
- Organic acids
- Alcohols
- Ketones and aldehydes
Injection compression molding and transfer molding are two widely used rubber molding processes for manufacturing high-performance rubber components.
Injection compression molding combines injection molding and compression molding. Rubber is injected into an open mold cavity, and the mold closes to uniformly compress the material before curing. This method improves consistency and reduces excess flash.
Transfer molding uses a transfer pot and plunger system. Pre-measured rubber is placed into the chamber and forced into closed mold cavities through runners and sprues, where it cures under heat and pressure.
Both processes are effective for producing precision rubber parts, but the best choice depends on part complexity, volume, and material requirements.
Viton® is not recommended for use with:
- Ketones
- Low molecular weight esters
- Nitro-containing compounds
EPDM works well with animal and vegetable oils, but not with petroleum-based oils or fuel
Viton® is resistant to:
- Aliphatic, aromatic, and halogenated hydrocarbons
- Acids
- Animal and vegetable oils
- Air and oxygen at elevated temperatures
EPDM is resistant to:
- Ozone and weather exposure
- Animal and vegetable oils
- Strong and oxidizing chemicals
Natural gum rubber performs well in temperatures from -60°F to 220°F.
Viton® performs well in temperatures from -10°F to 400°F.
