Self-lubricating Liquid Silicone Rubber (LSR) is gaining attention as a practical material choice for manufacturers who want smoother assembly, quieter movement, and more consistent surface performance in molded silicone parts. Unlike conventional silicone rubber that may rely on external lubricants, self-lubricating LSR is designed to form a thin oil layer on the cured surface, creating a natural slip effect. This can reduce friction during installation and use, improve demolding, and help finished parts maintain stable performance over time.
At GUANGZHOU RUIHE NEW MATERIAL TECHNOLOGY CO.,LTD, our self-lubricating LSR grades are developed for injection molding, especially where friction, drag, or squeak impacts product quality. Typical applications include waterproof sealing parts (sealing rings, gaskets, caps, plugs, splash-proof seals) and furniture seals & sliding components (drawer rails, soft-close structures, edge protectors, anti-wear contact parts). In these products, low friction is not a “nice-to-have”—it directly supports faster assembly, smoother movement, and reduced wear marks.
Two commonly selected grades are 6250-30SL and 6250-40SL. Both are milky-white and feature self-lubricating surface behavior after curing. The oil content is adjustable, allowing manufacturers to tune slip levels based on part design and end-use needs. It is important to note that self-lubricating grades are not recommended for food-grade products, so selection should match the compliance requirements of your target market.
Below is a quick comparison table that helps engineers and sourcing teams shortlist grades based on hardness, strength, and friction-related needs.
Self-Lubricating LSR Data Table (Typical)
| Item |
6250-30SL |
6250-40SL |
| Appearance |
Milky white |
Milky white |
| Hardness (Shore A) |
27–31 |
39–43 |
| Density (g/cm³) |
1.09–1.12 |
1.08–1.11 |
| Rebound (%) |
≥50 |
≥50 |
| Tear Strength (kN/m) |
≥15.0 |
≥25.0 |
| Tensile Strength (MPa) |
≥5.0 |
≥7.0 |
| Elongation (%) |
≥500 |
≥400 |
| Oil Content (%) |
6 |
6 |
| A-side Viscosity (Pa·s) |
1700 |
1500 |
| B-side Viscosity (Pa·s) |
1400 |
1300 |
| Main Molding Method |
Injection molding |
Injection molding |
For industrial projects focused on sealing, sliding, and assembly efficiency, self-lubricating LSR can be a cost-effective way to improve performance without adding secondary lubrication steps.
Contact
Tel: 86 13421773611
Whatsapp/Wechat: 86 13421773611
Email: wendy@ruihesilica.com
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