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Siberian Bushing™

Premium OEM Standard PU Bushings for daily driving and challenging road conditions

Strongflex™

Bushings for motorsport, drift and racing with a hardness of 80 Sha (red PU) / 90 Sha (yellow PU)

SPL Parts™

High-performance adjustable control arms, camber links, and traction arms for both street and track applications

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If you’ve recently installed or are planning to install polyurethane (PU) bushings, such as those from Siberian Bushing, it’s important to understand a key step that often gets overlooked: proper lubrication. Unlike rubber bushings, PU bushings require specific care and maintenance to perform at their best. One of the most crucial elements of that care is lubrication.

Why Lubrication Is Essential for PU Bushings

Polyurethane bushings are favored for their durability, performance, and resistance to wear. However, they are also more prone to squeaking and binding if not properly lubricated. These symptoms not only cause noise but can also lead to premature wear or compromised suspension movement.

Lubrication helps:

  • Reduce friction between the bushing and its housing or mating surfaces.
  • Prevent squeaks that are common in dry installations.
  • Ensure free movement of suspension components under load.
  • Prolong bushing life by minimizing heat and material stress.

What Kind of Grease Should You Use?

When it comes to lubricating PU bushings, not all greases are created equal. You should use:

  • Silicone-based grease specifically designed for polyurethane or plastic components.
  • A non-petroleum-based formula, as petroleum products can degrade polyurethane over time.

Avoid general-purpose automotive greases, especially those with petroleum additives, which can cause swelling or softening of the bushing material.

How and When to Apply Grease

Initial Installation

Every bushing should be generously lubricated at the time of installation. Pay attention to:

  • Inner surfaces where the metal sleeve meets the bushing.
  • Outer surfaces that contact the housing or bracket.
  • Any interfaces where movement is expected.

Refer to the installation guides available on our website for step-by-step instructions and illustrations. We provide detailed manuals for all major bushing types here:
👉 https://durable.parts/category/manuals/

Maintenance Schedule

Under typical driving conditions, relubrication is rarely required. However, if you’re:

  • Operating in extreme environments (dirt, mud, road salt),
  • Frequently using your vehicle for track days or off-roading, or
  • Noticing squeaking or binding,

…it may be time to inspect and reapply grease. This can be done by disassembling the bushing mount and reapplying fresh silicone-based grease. We recommend a yearly inspection for heavily used vehicles or during routine suspension checks.

Final Tips for DIY Installers

  • Clean all surfaces thoroughly before applying grease.
  • Don’t skimp—generous application helps avoid future issues.
  • Torque fasteners to spec only after the vehicle is resting at ride height, to avoid preloading bushings.

Whether you’re upgrading for performance, durability, or just replacing worn-out components, taking the time to lubricate properly will ensure your PU bushings deliver long-lasting, noise-free performance.

For more installation resources and product-specific guides, visit our manual library:
durable.parts/category/manuals/

Happy wrenching!