We Offer
Click on the images
Rubber insulating rolls and sheets
Extruded profiles and O-rings by the meter
Specialized extrusion and molding services
Vulcanized joint services
At Gramo Industrial, we design and manufacture technical rubber solutions for the electrical industry, using high-performance materials such as nitrile, neoprene, SBR, silicone, viton, and natural rubber, available in rolls, sheets, extruded profiles, and molded parts. Our products are formulated to provide dielectric insulation, thermal and chemical resistance, as well as extreme durability in industrial environments.
Our rubber division specializes in developing custom compounds for critical applications such as transformer sealing, electrical discharge protection, panel insulation, electrical machinery covers, and gaskets resistant to harsh environments.
Click on the images
Rubber insulating rolls and sheets
Extruded profiles and O-rings by the meter
Specialized extrusion and molding services
Vulcanized joint services
Our products come with a Quality Certificate and Technical Test Report in compliance with the corresponding ASTM Standards; these are issued by an External Laboratory Accredited by EMA.
| Type | Description | Shore A Hardness | Minimum Tension % PSIA | Minimum Elongation % | Temperature Range °C | Resistance to: | ||
|---|---|---|---|---|---|---|---|---|
| Greases and Oils | Weather and Ozone | Alkalis and Acids | ||||||
| Rubber for electrical and electronic industry |
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| Anti-static Rubber | 65 - 75 | 1000 | 400 | -25 to 105 | B | R | R | |
| Conductive Rubber | 70 - 80 | 1250 | 350 | -25 to 105 | B | R | R | |
| Dielectric EPDM Rubber | 62 - 68 | 550 | 600 | -25 to 130 | M | E | R | |
| Nitrile GT (Transformer Grade) 60 | 60 - 65 | 1200 | 550 | -25 to 120 | E | B | R | |
| Nitrile GT (Transformer Grade) 70 | 70 - 75 | 1200 | 450 | -25 to 120 | E | B | R | |
| Fine Grade Cork Nitrile | 60 - 65 | 300 | 200 | -25 to 110 | E | B | R | |
| Coarse Grade Cork Nitrile | 60 - 65 | 300 | 200 | -25 to 110 | E | B | R | |
| Silicone Rubber Red, White and Black | 60 - 65 | 650 | 300 | -50 to 235 | R | E | R | |
| Translucent Silicone Rubber | 60 - 65 | 1150 | 390 | -50 to 235 | R | E | R | |
| Rubber for other industries |
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| Viton | 70 - 75 | 750 | 340 | -50 to 260 | E | E | E | |
| Polyurethane | 70 - 95 | 700 | 100 - 600 | -50 to 250 | E | E | E | |
| Black SBR | 60 - 65 | 350 | 400 | -25 to 80 | M | R | R | |
| Red SBR | 70 - 75 | 500 | 300 | -25 to 80 | M | R | R | |
