Low Compression Set Silicone Materials for Custom Sealing Parts
Review silicone material options for sealing parts that require stable recovery, lower deformation, and reliable performance under compression.
Built for Seals That Need to Recover
Low compression set silicone is selected when the finished part must maintain sealing pressure after long-term compression, repeated opening, heat exposure, or assembly stress. It helps your sealing product stay functional instead of slowly losing its shape.
- Better recovery for sealing structures under repeated or long-term compression.
- Useful for gaskets, O-rings, sealing lips, pressure seals, and soft contact parts.
- Material choice can be reviewed with groove design, hardness, compression ratio, and sealing load before sampling.
Reference Performance Focus
This table focuses on material directions confirmed from supplier information. Final values should be checked against the selected grade, drawing, compression ratio, curing route, and finished-part testing plan.
| Material Direction | Reference Series | Primary Focus | Process Route | Sealing Review Points | Compliance / Documentation Notes |
|---|---|---|---|---|---|
| Low Compression Set HCR | TY971 reference family | Low deformation, rebound, sealing stability | Compression molding / custom molding | Hardness, groove fit, compression ratio, heat exposure, recovery after load | Food-contact directionGrade-specific data requiredBatch traceability support |
| Low Compression Set LSR | TYL-6421-C reference family | Precision sealing geometry, low deformation, recovery | LSR injection molding | Flow, gate position, parting line, sealing lip thickness, compression load | Addition-cure LSRPrecision molding supportTesting plan by project |
| Food-Contact Sealing Route | Selected HCR / LSR grades | Low deformation with food-contact support | Compression molding / LSR injection | Temperature, cleaning condition, contact medium, compression cycle, sealing requirement | FDA / LFGB reviewFinished-part testing recommended |
| Custom Sealing Grade Route | Project-specific selection | Balance of hardness, rebound, sealing force, and process stability | Compression / transfer / LSR / extrusion | Wall thickness, sealing pressure, tolerance, demolding risk, post-curing needs | Material report supportSample validation required |
Note: Compression set and sealing performance are strongly influenced by part design, compression ratio, temperature, curing condition, contact medium, and working time. Final confirmation should be based on grade-specific data and finished-part testing.
Sealing Material Support Backed by Factory Execution
Beyond material data, your sealing project needs formulation flexibility, reliable silicone raw material sources, controlled production, and complete documentation support.
Dedicated Formulation Development
Exclusive material formulas can be developed around compression set, hardness, rebound, sealing force, and finished-part performance.
Premium Silicone Raw Material Source
Sealing HCR and LSR projects are supported by premium silicone raw materials from major suppliers, helping deliver strong recovery and stable material quality.
Controlled Production Capacity
Strong manufacturing capability, controlled production environment, and repeat-order process control help maintain consistent sealing part quality across batches.
Complete Documents & Certification Support
Material reports, batch records, inspection files, FDA/LFGB support, and third-party testing coordination can be prepared according to your market needs.
Not sure if your seal needs a low compression set silicone route?
Send your drawing or sample photo. We can review groove design, compression load, hardness, and material options before sampling.
Sealing Product Cases
These case directions show where low compression set silicone can be useful. The final material route should still be confirmed by drawing, groove design, compression ratio, hardness, and expected use condition.
O-Rings & Static Seals
For sealing parts that need recovery after long-term compression.
Custom Gaskets
For flat, shaped, or groove-mounted sealing structures.
Sealing Lips & Rings
For soft-contact sealing structures under repeated load.
Tube & Fluid Seals
For connection areas requiring reliable compression recovery.
Pressure Gaskets
For sealing systems with heat, pressure, and long-term load.
Manufacturing Routes for Sealing Silicone Materials
Your sealing silicone project needs a process route that protects geometry, keeps compression areas stable, and supports consistent sealing performance from sampling to repeat production.
HCR Compression Molding
You can use HCR molding for solid sealing parts where compression ratio, flash, groove fit, and post-curing need early review.
LSR Injection Molding
You can develop precision LSR sealing parts with controlled flow, gate planning, efficient curing, and repeatable sealing geometry.
Transfer Molding
You can choose transfer molding when sealing details, insert areas, or cavity filling require tighter control.
Extrusion
You can produce sealing strips, profiles, sleeves, and tubing where continuous section stability and compression recovery are important.
Finishing & Post-Processing
You can reduce sealing defects through controlled trimming, deflashing, edge inspection, post-curing review, and packaging steps.
Material & Mold Evaluation
You can review material choice with groove design, compression ratio, parting line, wall thickness, tolerance, and sealing load before sampling.
What Helps Confirm Your Sealing Material Route
Complete project information helps determine whether low compression set HCR, low compression set LSR, extrusion, or another process route is more suitable before sampling.
Need to Confirm a Low Compression Set Silicone Route?
Send the drawing, target hardness, groove design, compression condition, working environment, estimated quantity, and sample photos. Your sealing HCR, sealing LSR, and process options can then be reviewed before sampling.
Low Compression Set Silicone Material Questions
Key questions your team may need to confirm before sealing HCR or LSR material selection.