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March 26, 2018 - Aerospace Assembly Automotive

Grease or Anti-Seize: Know the Difference

 

Grease and anti-seize are popular options for industrial assembly processes. Yet while they both aid in end-product functionality and durability, it’s important to understand their distinct differences.

Grease

Ideal for fast-moving, low pressure applications, grease is formulated with oil and a thickener. Containing low solids content, it enables parts, such as high-speed automotive ball bearings, to move rapidly without making contact.

However, grease is not suitable for high load or high temperature applications. This is because the oil burns off around 400°F, and its film is not strong enough to hold much pressure.

Anti-Seize

Designed to reduce torque, anti-seize is formulated with high solids content and grease. Because of its high solids content (at least 40%), anti-seize can handle high pressure, high load applications while still providing lubrication and friction reduction. However, anti-seize is not suitable for fast-moving applications, as its high solids content can cause parts to jam.

Yet unlike grease, anti-seize can withstand high temperatures and offer corrosion protection even under extremely stressful environments. This makes it ideal for many nut, bolt and press fit applications.

Refer to following chart for an at-a-glance comparison:

Grease Anti-Seize
Low solids content High solids content
Good for fast-moving, low contact, low pressure applications Good for slow-moving, high contact, high pressure applications
Not suitable for temperatures above 400°F Suitable for high temperature environments


Smart Options

Bostik manufactures Never-Seez®, industry-leading line of anti-seize compounds that:

  • Protects from seizures at high temperatures
  • Resists galvanic action
  • Prevents galling
  • Protects against rust and corrosion

Additionally, Bostik offers a bearings grease product, containing 5% solids and ideal for fast-moving, low pressure applications. For more information on these smart solutions, visit www.bostik.com, or call 800-7-BOSTIK.

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