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The range for different applications covers cylinders made from rubber, NBR, sponge rubber and rollers with a sponge rubber covering. Added to that are cylinders with a silicone coating.

Rubber cylinders
These are cylinders made from EPDM, a rubber that has similar properties to NBR but a lower wear resistance and ultimate strength. The material is also known as ethylene-propylene rubber. It has a better chemical resistance.

Suitable for cylinders where they have to cope with heat, chemicals, hot water, steam and exposure to the weather. Resists certain chemicals.

NBR (Perbunan) cylinders Nitrile-butadiene rubber is a copolymerisation product of acrylonitrile and butadiene. NBR resists swelling when in contact with oils, greases and fuels. It is primarily used in general machinery applications. Please note that NBR is unsuitable for cylinders in contact with ketones, esters and aromatic and chlorinated hydrocarbons.

NBR – the technical parameters:

  • Somewhat inferior properties to those of natural rubber
  • Can be used over a temperature range from -40 to +120°C
  • Relatively resistant to abrasion, resistant to ageing
  • Used as an oil- and grease-resistant rubber grade when good grip is essential

Sponge rubber cylinders, rollers with sponge rubber covering: Internorm recommends sponge rubber with porosity grades from 1 to 3 for applications where very soft rollers are necessary, e.g. stripping and painting of timber mouldings and battens. The woodworking industry in particular provides countless applications for such products.

Sponge rubber grade:
This soft material adapts well to many different shapes and ensures an even coating. Ideal for very soft cylinders, e.g. for coating timber mouldings etc.


Silicone coatings are relatively complex and expensive. But they are essential where high service temperatures of up to 200°C are encountered. Important advantages of silicone are its excellent weathering and ozone resistance.

For what applications are they suitable?
Internorm can provide cylinders coated with a silicone-based polymer. This polymer has mechanical properties very similar to those of PU. Silicones are used in medical technology and also in the foodstuffs sector. Properties such as abrasion resistance, tearing strength and resistance to bending cracks are rather poor. Resistance to chemicals and heat are the good properties of silicone. Owing to their adhesive properties, silicone coatings achieve excellent application results for gluing operations in particulart.

Suitable for cylinders where they have to cope with heat, chemicals, hot water, steam and exposure to the weather. Resists certain chemicals.

Silicones, silicone-based polymers
Silicone-based polymers have the same properties as silicone but with much better tear propagation resistance and resistance to cuts.

VMQ (silicone rubber)
1. Composition
Silicone rubber is an exclusively organic compound. The polymer chain is formed by the multiple bonding of oxygen and silicon atoms. In the case of VMQ, there is a vinyl side group attached to the silicon atom. Therefore, polycondensation is used for the production of VMQ.

2. Properties and uses
VMQ has very impressive properties: permanent resistance to dry heat (up to approx. 200°C, briefly up to 240°C), permanent elasticity at high and low temperatures, resistant to ageing, weathering and ozone, electrically conductive and good chemical resistance.

3. Trade names are: Silopren®, Silastic®, SE®, Blendil®

4. Reaction to fire: VMQ burns poorly and the burnt area turns white.

5. Material parameters: density: 1.10 – 1.20 g/cm³; tensile strength: > 5 N/mm²; elongation at failure: 350%; service temperature: -60 to +200°C; hardness: 35 – 65 Shore A.


It doesn’t matter how unusual your ideas are, we love challenges.

Director of Roller Sales

TEL: (+49) 5491 - 9691-326
E-MAIL: a.deters@internorm.de

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