What is a rubber gasket?

A rubber seal is an elastic component suitable for mechanically sealing small gaps or joint surfaces, preventing the passage of moisture, dust, gas or liquids. . It can be in the form of a ring, a strip or a module — and made of natural or synthetic rubber such as EPDM, NBR or FKM

Key functions of rubber seals

1. To prevent seal leakage – the flexibility of the rubber material ensures close contact with the surfaces

2. Shock and vibration damping – rubber gasket acts as a cushion in devices and vehicles

3. Insulation against heat and sound – in many applications it helps to keep temperature or noise levels under control

Rubber materials – properties and areas of application

EPDM

• Particularly weather, UV and ozone resistant

• Temperature range −35 °C…+100 °C.

• Suitable for exteriors, windows, roof and waterproofing, and cars

NBR (nitrile rubber)

• Good oil and chemical resistance – excellent for petrochemical applications

Silicone and FKM (fluororubbers)

• Silicone: very good temperature and aging resistance.

• FKM: suitable for extreme chemical environments

Applications (in Helsinki Rubber's selection)

• Industrial: piping, pressure vessels, mechanical joints.

• Construction: door and window seals, waterproofing, roofs

• Auto industry: engine seals, brake systems, bodies.

• Domestic science: faucets, valves, household appliances — preventing water leaks.

Selection guide – which material is right for you?

It is worth checking the hardness, elongation, residual compression, chemical resistance and packaging properties of the rubber sheet or gasket.  Helsingin Kumi, customized solutions: rubber sheets can be punched, glued and cut according to customer drawings

Installation and maintenance tips

1. Ensure clean and behave installation area. Natural or oil will cause deformation of the seal.

2. Check the correct size and density of the gasket – too tight or loose installation will impair the seal.

3. Avoid inclement weather – EPDM can withstand outdoor use, but NBR cannot withstand UV radiation for long periods of time.

4. Maintenance is generally low, especially with EPDM – it retains its properties for a long time without loss of performance

Why choose Helsingin Kumi Oy?

• Expert advice: Our knowledgeable staff will help you choose the right material.

• Customization: Rubber sheets and shaped parts are cut to exact dimensions according to the customer's needs

• Wide selection: EPDM, NBR, silicone rubbers and others – including foam and tape seals.

• Quality: Tight tolerances and durable manufacturing ensure reliable sealing function.

Summary

Rubber gaskets provide versatile functions – sealing, damping and insulation – for various industries and households. A wide range of materials (EPDM, NBR, silicones, FKM) serves different needs according to requirements. Helsingin Kumi Oy offers high-quality, customizable rubber solutions and expert service to ensure reliable and long-lasting sealing.

If you need more information or would like to request a quote, contact the experts at Helsingin Kumi — we will be happy to help you choose the right rubber seal solution!

Why choose Helsingin Kumi Oy?

Helsingin Kumi Oy is a well-known supplier of quality rubber products, including durable and custom-made rubber mats. Our expert staff provides personalized advice and support, ensuring you get the right solution for your needs.

We cut according to the measurements. Contact Us to our experts.