Eco-Friendly Two-Part Foamed Silicone for Sealing

liquid silicone Foam, also known as Foamed Silicone or Silicone Sponge, is a two-component Addition Curing Silicone rubber that self-expands through chemical foaming once the two liquid parts are combined. The result is a soft, featherweight, environmentally safe material that can be cast at any thickness with simple handling. HONG YE SILICONE — a long-established manufacturer of Mold Making Silicone and RTV-2 silicone rubber — supplies consistent, high-quality Silicone Foam to buyers in more than 138 countries.

Technical Specifications

• Type: Two-part, platinum-catalyzed addition silicone
• Mix Ratio: 1:1 by weight (A:B)
• Expansion: 2× standard, up to 7× maximum volume
• Working Temperature: -65°C to +200°C continuous service
• Key Properties: Uniform cells, low linear shrinkage, high rebound, chemical inertness, flame retardant
• Standards: ISO9001, UL, CE
• Packaging: A 25/250/200 kg; B 20/25/200 kg per drum
• Storage: Sealed, cool, dry place; shelf life 12 months

Product Images and Videos

[Insert: Liquid A and B component photo | Real-time foaming demonstration | Cross-section of cured silicone sponge | Finished seals, insoles, and robot filling application] [Insert video: Mixing → vacuum degassing → pouring → foaming → cure → quality inspection]

Product Features and Advantages

1. High Foaming Ratio — Expands 2× naturally and up to 7× maximum, meaning you need less silicone to fill the same volume and cut material cost.
2. Superior Uniformity — Even cell distribution, stable foaming, minimal shrinkage, and dependable rebound for consistent part quality.
3. Ultra-Light and Soft — Excellent hand-feel with no migration, no collapse, and no shrinkage over time.
4. Safe by Design — Non-toxic, non-corrosive, non-radioactive, and chemically inert; suited even to Human Body Silicone and skin-contact goods.
5. Broad Temperature Window — Stays flexible from -65°C to 200°C with strong resistance to heat, cold, electrical breakdown, and flame.
6. Production Friendly — Straightforward 1:1 ratio works for hand mixing, low-pressure dispensing, and automated production lines alike.

How to Use — Step by Step

1. Re-mix each component thoroughly before use so settled fillers are evenly distributed.
2. Blend Component A and B at 1:1 weight ratio and stir for 2–3 minutes until the batch is completely uniform.
3. Vacuum-degas the blend and use it quickly to avoid premature thickening that can interrupt production.
4. Pour or inject into the mold, then let the material foam and cure at room temperature or with mild heating.

Application Scenarios

• Sealing & Insulation: Gaskets, sealing strips, foam sheets, silicone foam pipes, and sponge rollers for copiers and printers.
• Comfort & Automotive: Silicone insoles, sofa and mattress pads, headrests, gear lever covers, and seat cushions.
• Wellness & Care: Bra and shoulder pads, senior fitness tools, maternity back supports, and infant pillows.
• Model & Filler Use: Internal filling for silicone robots, lifecasting figures, and display models.
• Electronics: Lightweight damping and filling that complements Electronic Potting Compound systems.

Value to Buyers: Lower material costs through high expansion, better consistency through uniform foaming, and fewer field failures thanks to the -65°C to 200°C service range.

Certifications and Compliance

Manufactured in an ISO9001-certified plant and certified to UL and CE standards. Our addition curing silicone grades align with global safety and environmental regulations, supporting smooth entry into American, European, and Asia-Pacific markets.

Customization Options

We tailor hardness, foaming ratio, color, viscosity, and cure speed to your process. Flame-retardant, food-contact, and medical-grade formulations are available on request.

Production Process

Raw material inspection → precise A/B batching → vacuum compounding → lab testing of viscosity, expansion, and hardness → sealed packaging → final inspection before shipment. 48 production lines and 23+ years of experience ensure consistent quality and on-time delivery.

FAQ

Q: Can Liquid Silicone Foam be used in food-contact products? A: Yes. We offer specialized food-grade formulations that meet relevant contact standards. Please specify your requirement when ordering.

Q: How is the expansion ratio adjusted?

A: The standard material gives 2× expansion. For up to 7×, we adjust the formulation and advise on temperature and processing settings for your application.

Q: What conditions affect curing?

A: Avoid sulfur, nitrogen, phosphorus, tin, lead, cadmium, mercury, hexavalent chromium, PBBs, PBDEs, and water — these can inhibit platinum curing. Also avoid direct sunlight and high-temperature baking.

Q: Is the material suitable for automated production?

A: Yes. Its 1:1 ratio and stable pot life make it compatible with automated mixing and dispensing systems. We can supply low-viscosity grades for this purpose.

Q: What is the minimum order quantity?

A: MOQ is flexible and depends on grade and packaging size. Contact our team for a quotation tailored to your volume.