How to Choose the Right Liquid Silicone Hardness for Your Specific Products
Jan 12,2026
Choosing the right liquid silicone hardness depends on matching your product’s usage scenarios, functional needs, and contact objects. Key factors include the 0–70 Shore A hardness range characteristics, certification requirements, and production processes. Below is a concise scenario-based guide for easy selection.
I. Core Selection Criteria
1. Product Functional Requirements
Soft/Fitting Products: 0–10 Shore A (skin-friendly, cushioning)
Shaping/Supporting Products: 20–70 Shore A (structural stability)
2. Contact Objects and Environments
Food/Human Contact: Prioritize FDA/LFGB-certified platinum-cured silicone (balance safety & practicality)
Industrial Molds: Adjust based on demolding difficulty & temperature resistance; match mold complexity
3. Adaptation to Production Processes
Casting Molding: Low-hardness silicone (better fluidity for complex textures)
Coating/Calendering: Medium-hardness silicone (easy to control thickness & shape)
II. Product-Specific Hardness Guide
Product Type | Recommended Hardness | Reasons |
Human Contact (Silicone Dolls, Powder Puffs, Shoulder Pads) | 0–10 Shore A | Ultra-soft & skin-friendly; choose dry, oil-free formulas to avoid stickiness |
Food Molds (Fondant, Chocolate, Brown Sugar) | 10–20 Shore A | Balances softness & shape retention; easy demolding (no deformation/sticking) |
Daily Protection (Insoles, Wrist Supports, Gloves) | 20–40 Shore A | Elastic cushioning, wear/tear-resistant; no collapse after long use |
Industrial Molds (Resin, Gypsum, Cement) | 40–70 Shore A | High hardness/tensile resistance; withstands repeated demolding; maintains precision |
III. Key Tips to Avoid Issues
Low-hardness (0–10 Shore A): Avoid silicone oil seepage; choose specially treated dry-surface products
Fine-tune for usage scenarios: e.g., 0–5 Shore A (thin powder puffs), 5–10 Shore A (thick shoulder pads)
Pre-production sample testing: Simulate real use (temp/pressure/friction) to verify hardness
Need a reliable supplier for customized hardness silicone? Our platinum-cured silicone covers 0–70 Shore A, passes FDA/ROHS/SGS, and ensures dry, oil-free low-hardness products. Contact us for 1-on-1 consultation & free samples!
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