Many maintenance teams face this issue: brand-new rubber seals go sticky, deformed, leak grease, harden or crack within just 2–3 months. Most blame seal quality, yet incompatibility between grease, rubber material and working conditions is the real cause. Proper grease selection fundamentally fixes seal failure.
1. Compatibility Trumps Lubrication
Rubber absorbs grease, and mismatched grease triggers two permanent damages:
1. Grease components swell rubber and distort dimensions
2. Grease leaches plasticizers, making seals lose elasticity, harden and crack
Two common wrong choices to avoid:
· Grease with high aromatic mineral oil: Swells EPDM seals, breaks sealing clearance and causes oil leaks
· Regular EP grease: Corrodes NBR rubber, leading to cracking and scrap
2. Grease Matching by Seal Material
Match grease formula to rubber/plastic first for long service life:
1. EPDM & NBR rubber seals Choose PAO synthetic grease or polyurea grease. Stable chemically, no swelling, plasticizer leaching or corrosion, retains rubber elasticity for most industrial seals.
2. PVC & ABS plastic seals Silicone-based or PTFE grease recommended. Highly inert to prevent plastic brittleness, deformation and cracking for precision plastic sealing parts.
3. Grease Selection Based on Working Conditions
Material compatibility is basic; matching operating conditions delivers long-term performance:
· High temperature: Replace ordinary lithium grease with high-temperature synthetic grease for stable oil film
· Low temperature & wide temperature fluctuation: Wide-temperature grease ensures fluidity to avoid jamming and dry wear
· Humid, water-exposed or chemical environments: Water/acid/alkali resistant grease resists medium erosion
· Heavy load & high pressure: High-consistency adhesive grease prevents grease extrusion and dry friction
Tip: Thin, even coating only after cleaning contact surfaces. Excess grease traps contaminants and accelerates seal aging.
Customized Solutions
Universal grease fails special industrial equipment. Baoxing customizes grease formulas based on seal material, operating environment and equipment parameters. Optimized for compatibility, temperature resistance, waterproofing, chemical resistance and pressure resistance to eliminate grease leakage, stickiness, brittleness and early seal aging.
Contact Baoxing technical team for tailored selection plans and free sample testing to cut maintenance costs and equipment breakdown rates.
Tags: Rubber Seal Aging | Seal Grease | Special Lubrication Solutions | Lubricant Manufacturer | Baoxing
