Over the years the Hallite 18 has shown itself to be an effective and robust seal in a wide variety of applications. Comprising a rubberised fabric U form base to which is bonded a rubber energiser, the seal section is pre-loaded by the housing when installed to ensure effective sealing at low pressure.

The Hallite 513 is a standard profile loaded U-cup with precision trimmed sealing lips manufactured in either a polyurethane or polyester shell energised by a high quality O-ring and designed for common North American grooves.

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The Hallite 511 is a standard profile loaded U-cup with precision trimmed sealing lips manufactured in either a polyurethane or polyester shell energised by a high quality O-ring and designed for common North American square grooves.

Copyright © 2025. LKQ Euro Car Parts is a trading name of LKQ Group (UK) Limited. LKQ Group (UK) Limited is registered in England & Wales (Company No 02680212). VAT No: 766436989.

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Hallite offers a wide range of piston seals that provide the ultimate in leakage control. Piston seals are usually manufactured in our high performance polyurethane Hythane® 181, Hallprene® rubber/fabric composite or polyester elastomer.

What is a wheel bearing?  A wheel bearing is a set of steel balls enclosed by a metal ring, and is positioned on a metal axle shaft within the hub. Wheel hubs are the mounting assemblies at the centre of each wheel, holding the bolts that attach the tyre to the wheel. The wheel hubs and bearing need to be kept in good condition, as they support the weight of the vehicle, and help make sure your wheels can fully rotate as you drive. Why do my front tyres make loud noises when I drive?  If your wheel hubs are dented, you might notice a grinding noise or vibration as you turn the corner. A worn wheel bearing is caused by friction, so you're more likely to hear this noise as your car picks up speed. You might also notice a thumping or knocking sound, which is caused by the wheel bearing rotating too loosely.  Can you drive with a bad wheel bearing?  A worn or poorly-aligned wheel bearing can make your steering feel loose or your car to pull to one side, so it can be very dangerous to drive once you notice an unusual noise. If you notice a thumping noise on one side of your car, you could be at risk of losing a wheel.  Are wheel bearings easy to fix?  Wheel bearings are subject to wear and tear, as well as rust over time. Once your wheel bearing has worn down, it will need to be replaced. While you can do this yourself with the right tools, it's always best to leave it to the experts if you're unsure.

Piston seal types

A wheel bearing is a set of steel balls enclosed by a metal ring, and is positioned on a metal axle shaft within the hub. Wheel hubs are the mounting assemblies at the centre of each wheel, holding the bolts that attach the tyre to the wheel. The wheel hubs and bearing need to be kept in good condition, as they support the weight of the vehicle, and help make sure your wheels can fully rotate as you drive.

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Piston Seal additive

The Hallite 512 is a standard profile loaded U-cup with precision trimmed sealing lips manufactured in either a polyurethane or polyester shell energised by a high quality O-ring and designed for common North American grooves. The precision trimmed sealing lips ensure optimum sealing action.

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Wheel bearings and hubs are subject to wear and tear due to their close proximity to the road surface, keep them in good condition to make sure your wheels can turn efficiently. Available for all makes and models, shop our range today.

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The Hallite 606 single-acting, single lip asymmetric piston seal is designed with precision trimmed sealing lips to provide effective bore sealing in light and medium-duty applications. The seal can be considered for use in heavy-duty applications when used with a suitable full depth back-up ring.

The Hallite 601 high-performance, general purpose, single-acting U-ring rod or piston seal is designed to provide a dry sealing solution in light and medium-duty applications and manufactured in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance.

Wheel bearings are subject to wear and tear, as well as rust over time. Once your wheel bearing has worn down, it will need to be replaced. While you can do this yourself with the right tools, it's always best to leave it to the experts if you're unsure.

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The best sealing capacity of a double-acting cylinder, capable of sealing dynamic pressure from both sides (bidirectional), is achieved by choosing a double-acting seal.

Wiper seal

A piston design where two single-acting seals on the piston for a double-acting cylinder are used can easily give rise to a breakdown. The reason is that a very high pressure can be trapped between the seals.

The Hallite P16 is a single-acting, o-ring energized, low-friction piston seal especially useful where smooth movement and location accuracy is required. The P16 design is based on the very successful R16 rod-seal design which has been proven in the market to be an excellent seal.

The Hallite 15 rod seal has been well proven in many applications requiring a compact, low friction seal to work efficiently both at low and high pressures.

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Pneumatic piston seal

If your wheel hubs are dented, you might notice a grinding noise or vibration as you turn the corner. A worn wheel bearing is caused by friction, so you're more likely to hear this noise as your car picks up speed. You might also notice a thumping or knocking sound, which is caused by the wheel bearing rotating too loosely.

A worn or poorly-aligned wheel bearing can make your steering feel loose or your car to pull to one side, so it can be very dangerous to drive once you notice an unusual noise. If you notice a thumping noise on one side of your car, you could be at risk of losing a wheel.

The choice of piston seal is decided by the way in which the cylinder operates. For a cylinder which is exclusively single-acting, capable of sealing dynamic pressure from one side (unidirectional), it is always best to choose the type of seal designed to provide optimum sealing qualities for single-acting functions.

Hallite’s 656 is an asymmetric single acting piston seal. Similar in design to the Hallite 621 rod seal, Hallite’s 656 offers excellent sealing in light, medium and heavy duty single acting applications.

Manufactured in Hallite’s high performance polyurethane Hythane® 181, Hallite 656 is an extremely flexible seal making installation easy.

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The Hallite 71 single acting fluid seal assembly consists of the standard Hallite 18 single acting fluid seal and the Hallite 62 L shaped bearing ring (wear ring).

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This twin lip, asymmetric, single-acting piston seal with precision trimmed sealing lips provides a dry sealing solution in light and medium-duty application. The sealing lips are trimmed at an angle to give optimal rod sealing performance.

Copyright ©  2025. LKQ Euro Car Parts is a trading name of LKQ Group (UK) Limited. LKQ Group (UK) Limited is registered in England & Wales (Company No 02680212). VAT No: 766436989.

Rod seal

Piston seals, both single and double-acting, can be designed for and used with integrated or separate back-up rings and guide rings.

Wheel bearings and hubs are subject to wear and tear due to their close proximity to the road surface, keep them in good condition to make sure your wheels can turn efficiently. Available for all makes and models, shop our range today.