High-Expansion Two-Part Foamed Silicone for Seals

Product Overview

Liquid Foaming Silicone is a two-component addition-curing silicone rubber that expands chemically when the A and B liquids are combined. It cures into a soft, ultra-lightweight, and environmentally safe foam with no thickness limitation and easy operation. HONG YE SILICONE, a leading manufacturer of RTV-2 silicone rubber and liquid silicone, produces this foamed silicone with dependable quality for buyers across the Americas, Europe, Asia, and Africa.

Technical Specifications

• Material Type: Two-part, platinum-cured addition silicone
• Mixing Ratio: 1:1 by weight
• Expansion Performance: 2× standard; up to 7× maximum
• Service Temperature: -65°C to +200°C (long-term)
• Core Properties: Uniform cells, low linear shrinkage, high rebound, flame retardant
• Certifications: ISO9001, UL, CE
• Packaging: A 25/250/200 kg; B 20/25/200 kg per drum
• Storage: Sealed, cool, dry place; 12-month shelf life

Product Images and Videos

[Insert: A/B liquid components | Foaming expansion in real time | Foam cross-section texture | Finished seals, mattress layers, and robot filler] [Insert video: Production demonstration from mixing through cured part testing]

Product Features and Advantages

1. Maximum Material Efficiency — Expansion from 2× up to 7× means you produce more volume from less silicone, improving cost efficiency.
2. Consistent Foam Structure — Even cell distribution, stable foaming, and low shrinkage deliver uniform parts with reliable rebound.
3. Soft and Lightweight — Premium elastic hand-feel with no migration or shrinkage during service life.
4. Safe and Chemically Inert — Non-toxic, non-corrosive, non-radioactive, and stable; suitable for body silicone and skin-contact products.
5. Proven Temperature Durability — Maintains soft elasticity from -65°C to 200°C, with strong heat, cold, electrical insulation, and flame resistance.
6. Production-Friendly — Simple 1:1 ratio, no thickness limits, and compatibility with manual or automated dispensing systems.

How to Use — Step by Step

1. Stir Components A and B separately before use to redistribute any settled ingredients.
2. Mix A and B at a 1:1 weight ratio for 2–3 minutes until fully homogeneous.
3. Vacuum-degas the mixture and use it promptly to prevent premature thickening.
4. Pour or inject into the mold and allow foaming and curing at room temperature or with gentle heating.

Application Scenarios

• Sealing Components: Gaskets, sealing pads, foam strips, foam boards, silicone foam tubes, and copier/printer roller sponges.
• Comfort Products: Silicone insoles, sofa cushions, mattress layers, automotive headrests, and seat cushions.
• Health and Care: Bra inserts, shoulder pads, maternity back supports, infant pillows, and senior fitness equipment.
• Model and Filler: Core filling for silicone robots, lifecasting figures, and display models — a practical partner to mold making silicone and liquid silicone systems.
• Electronic Protection: Lightweight cushioning and filling in devices where electronic potting compound is also applied.

Buyer Benefits: Lower material costs through high expansion, improved product consistency through uniform foaming, and longer service life through wide-temperature stability.

Certifications and Compliance

Manufactured under ISO9001 quality management with UL and CE certifications, this liquid foaming silicone meets recognized international safety and environmental standards for easier global market access.

Customization Options

We provide adjustable hardness and expansion ratio, custom colors, tuned viscosity for automated lines, enhanced flame-retardant grades, and food-contact or medical-grade formulations upon request.

Production Process

Raw material inspection → precise batching → vacuum mixing and degassing → laboratory testing (viscosity, expansion, hardness) → sealed packaging → final inspection before shipment. With 48 production lines and 23+ years of experience, we ensure consistent supply and quality.

FAQ

Q: What is the typical curing time?

A: At room temperature, curing generally completes within a few hours depending on thickness and grade. Gentle heating can shorten the cycle for faster production.

Q: Can expansion and hardness be adjusted together?

A: Yes. Our technical team can tailor the formulation to balance expansion ratio and hardness for your specific part design.

Q: Are there substances that will inhibit curing?

A: Avoid contact with nitrogen, sulfur, phosphorus, tin, lead, cadmium, mercury, hexavalent chromium, PBBs, PBDEs, and water, which can poison the platinum catalyst.

Q: Do you support OEM production?

A: Yes. We offer OEM services and can produce custom grades, packaging, and labeling according to your specifications.

Q: What certifications support this product?

A: The product line is manufactured in an ISO9001-certified plant and carries UL and CE certifications.