Introducing Sanpu silicone's UltraTough® High-Tear Silicone Sponge
As a professional manufacturer with more than 16 years of R&D experience, Sanpu Silicone breaks the market dilemma:
Sanpu offer silicone sponge sheet with better tear resistance and higher temperature resistance than peers, but at a competitive price that won't break your budget. Today, let's focus on our core advantage High Tear Silicone Sponge Sheet designed to solve your most frustrating performance issues.
Core Performance:
- Ultra-high tear resistance: Resists tearing and splitting under heavy load, sharp edges, or repeated flexing.
- Excellent tensile & elongation: Maintains integrity even under significant stretching.
- Low compression set: Bounces back reliably after long-term compression; no permanent collapse.
- Uniform closed-cell structure: Consistent density, smooth surface, stable sealing performance.
- Wide temperature stability: -60°C to 250°C continuous; bear 280℃*72hrs.
- Abrasion & aging resistant: Withstands repeated friction, ozone, UV, and harsh environments.
- Lightweight yet strong: Lower density than rubber, reduces part weight without sacrificing strength.
- Cost-Effective Alternative: Same or better performance than premium brands, but 30-50% lower price-helping you save procurement costs without compromising quality.
Technical Data Sheet (Typical Values)
Item name: Closed Cell High Tear Strength Silicone
Density: 0.55–0.65 g/cm³
Hardness: 15 Shore A (customizable)
Tear Strength: ≥ 35 kN/m
Tensile Strength: ≥ 1000 kpa
Elongation at Break: ≥ 250%
Continuous Temp: -60°C ~ 250°C
Short-term Peak Temp: 315°C (HT grade)
Flammability: UL94 V-0
Water Absorption: ≤ 3%
Core application scenario
Traction motor insulation pad/ Sheldon Control Cabinet Sealing Gasket/ Air Conditioning System Shock Absorber/ Electronic compartment shock pad
Honor and qualification
Official certification, professional after sales service.
ROHS Certificate (closed cell silicone foam)
V-0 Certificate
FDA Certificate
ROHS Certificate (open cell silicone sponge)
REACH Certificate
Our factory & quipment
"Pursue excellence with a down-to-earth attitude"
FAQ
1. What is the difference between ultra-rigid foam silicone and ordinary foam silicone?
Answer: The core differences lie in toughness, tear resistance, and permanent compression deformation resistance. Conventional foam silicone is relatively soft, prone to tearing, and susceptible to collapse under prolonged compression; the ultra-tough variant, enhanced through optimized formulation and manufacturing processes, exhibits superior crack resistance and tear resistance, more stable rebound performance, and longer service life, making it suitable for industrial applications requiring dynamic sealing, frequent opening/closing, and long-term pressure-bearing conditions.
2. What is the temperature range of tolerance? Will it harden/ crack under extreme high or low temperatures?
Answer: For conventional long-term use, the temperature range is-60°C to 220°C; for high-end applications, it extends to-60°C to 250°C. The material remains non-hardening and non-brittle at low temperatures, non-collapsing and non-adhesive at high temperatures, and maintains its elasticity and sealing performance even after thermal cycling.
3. What is the fire resistance rating of this series?
Answer: No
4. What is the degree of permanent deformation after compression? Will long-term sealing lead to leakage?
Answer: The premium grade exhibits ≤15% compression recovery (70°C × 22 h), with more stable long-term compression resilience.
5. Can the density/hardness be customized? What is the range?
Answer: Customizable. The typical density ranges from 0.55 to 0.9 g/cm³, with a hardness of 10–35 Shore A; low-density materials are softer and suitable for filling and sealing applications, while high-density materials are more durable and ideal for load-bearing and shock absorption applications.
6. What is the maximum waterproof and dustproof rating? Is it resistant to electrolytes/ acids and alkalis?
Answer: With a well-designed structural configuration, IP67 protection can be achieved; the device is resistant to carbonate electrolytes, weak acids and bases, ozone, and ultraviolet radiation, and exhibits no corrosion or powdering during long-term outdoor or in-vehicle use.
7. Does it shed flakes, release substances, or emit an odor? Is it suitable for food or medical use?
Answer: Standard products exhibit no chip loss, no precipitation, and no unpleasant odor, and have been approved by the FDA.
8. What are the advantages compared to EPDM, PU, and CR foam?
Answer: EPDM is not heat-resistant (>150°C, prone to aging); PU is susceptible to hydrolysis and hardens at low temperatures; CR contains halogens and is prone to aging. Ultra-tough foam silicone offers a broader temperature range, superior flame retardancy, longer service life, and environmental safety, with lower overall costs under extreme operating conditions.
9. Can it be molded, cut, or backed with adhesive? What is the delivery time?
Answer: Can be formed by injection molding, cut from sheets or coils, and backed with adhesive; supports prototyping → small batch → large batch production; conventional prototyping takes 3–7days, while batch production requires 7–20 days (depending on specifications and quantity).
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