The difference between conventional silicone sponge
Stronger mechanical strength
The compressive strength and resistance to permanent compression set have been enhanced.High Density Silicone Foam Sheet can withstand greater tensile force without breaking easily and is more resistant to friction and wear
more heat resistant
Better performance in high temperature environment
Better sealing performance
Our 800kg/m3 density variant bridges the gap between traditional silicone sponge and solid rubber, offering compressibility with high load-bearing capacity
Low Factory MOQ:
Flexible production runs starting from just 20 m2
| Physical & Mechanical Properties | Standard Test Method | Target Value / Data |
| Bulk Density | ASTM D3574 | 800kg/m3 |
| Hardness | ASTM D2240 | 35 - 40 Shore A |
| Continuous Operating Temp | Intermittent | -60~230℃ |
| Tensile Strength | ASTM D412 | 1.5 MPa |
| Elongation at Break | ASTM D412 | 120% |
| Compression Set ($100^\circ\text{C}$ / 22h) | ASTM D3574 | <5 |
| Flame Retardant Rating | UL 94 | customizable |
| Thermal Conductivity | ASTM E1530 | 0.06-0.08 |
Typical Industrial Applications
EV Battery Thermal Runaway Protection: Serves as a flame-retardant cushion between lithium-ion cells to absorb expansion forces.
Electrical Enclosure Sealing: Protects outdoor telecom cabinets and heavy machinery control boxes from moisture ingress.
Automotive Gaskets: High-density NVH damping pads designed to withstand constant under-hood thermal cycles.
Heat Press Machine Insulation: High-durability thermal barriers used in industrial garment and textile printing equipment.
Sanpu silicone Co. Ltd is a famous silicone sheet manufacturer in China,specializing in a full range of silicone and silicone foam products for 15 years.
Our high-quality materials are produced in accordance with international standards and have been widely used and highly trusted in various industries.
More than 15 years' experience
We have a research and development team, a physics laboratory and a chemistry laboratory
Senior project managers effectively control all aspects of the project
Offer customization.
As a direct China manufacturer, Sanpu provides extensive post-processing customization. We supply these sheets with high-temperature pressure-sensitive adhesives (PSA) for reliable bonding. Our in-house fabrication facility supports custom die-cut gaskets, strip slitting, and custom thickness profiling to match precise engineering drawings.
13000M2
Total land area
40+
Workers
10milion
Registered capital
40+
Equiment Number
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
Q: How does the thickness tolerance of this 800 kg/m3 silicone foam hold up during high-volume die-cutting?
A: Our advanced process keeps thickness tolerances within better control than peer . The high structural density prevents cell distortion during rapid hydraulic die-cutting, ensuring clean edges, consistent dimensional accuracy, and minimal scrap loss for automated assembly lines.
Q: Can this super high density silicone foam maintain its sealing performance above 200 ℃?
A: Yes,thanks to our platinum-cured base polymer matrix, this material retains its elastic memory and stays below compression set under continuous exposure. It will not become brittle or lose its sealing force like standard polyurethane foams.
Q: How can you gurantee the quality?
A: Every production lot undergoes rigorous testing, including high-temperature oven aging, tensile testing, and compression set validation. This vertically integrated supply chain eliminates common material defects like uneven cell distribution or surface pinholes, ensuring predictable performance for global industrial suppliers.
Q: What is High density silicone sponge?
A: High density silicone sponge is a kind of special silicone sponge with different forumula ,whose density can almost reach 1g/cm3
Q: What is the MOQ of high density silicone foam sheet?
A: MOQ of first order is 20 meter squares, it's a friendly MOQ to lower your risk and your trial cost hugely.
Submit your CAD drawings, required material dimensions, and environmental specifications to our engineering department today. Contact Fujian Sanpu directly for custom die-cut samples and a factory-direct wholesale quotation.
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