Liquid Silicone Foam For Cushions Filling Parts

Product Overview

HY-F665 is a mid-range grade from our HY-F662–F6610 liquid silicone foam family, chosen by OEM buyers who need a balanced combination of softness and support. As a specialist producer of Mold Making Silicone, RTV-2 silicone and Silicone raw materials, we formulated this grade for repeatable, dimensionally stable foam parts: uniform pores, easy pouring, low shrinkage and dependable rebound. It cures at virtually any thickness without special tooling, resists migration and compression set, and performs from -65℃ to 200℃ — helping procurement partners make consistent lightweight parts with less scrap and lower cost.

Key Features & Advantages

1. 5x Balanced Expansion: A 0.21 g/cm3 cured density gives soft cushioning with enough body for seals and pads — a practical middle ground between featherlight and firm.
2. Uniform Cells, Stable Profile: Even micropores and low linear shrinkage keep parts consistent in size and feel, with no migration or post-cure shrinkage.
3. Soft, Light and Safe: Pleasant hand feel, non-toxic, non-corrosive, non-radioactive and chemically inert — suitable for close-contact goods.
4. Broad Temperature and Safety Profile: Flexible from -65℃ to 200℃; heat/cold resistant, electrically insulating and flame-retardant (UL94-V0).
5. Export-Ready Supply: 20 production lines, stable monthly output, OEM with pre-production samples and final inspection before shipment; lead time about 1 month, payment by T/T or L/C.

How to Use (Step-by-Step Guide)

1. Preparation: Stir Part A and Part B separately and thoroughly before use to re-blend any settled components.
2. Mixing: Combine Part A and Part B at a 1:1 weight ratio and stir slowly and evenly for 2–3 minutes until fully homogeneous.
3. Degassing and Pouring: Vacuum-degas the mixed compound and use it promptly to avoid premature foaming or trapped air; pour into the mold or cavity.
4. Curing and Handling: Let the material cure and expand in place. Keep it away from direct sunlight and high-temperature baking, and avoid contact with nitrogen, sulfur, phosphorus, tin, lead, cadmium, mercury, hexavalent chromium, PBB, PBDE and water. Store sealed in a cool, dry place.

Application Scenarios

This liquid Foam Silicone rubber is widely used for seals, gaskets, weather strips, foam boards and Silicone Foam tubes; for copier and printer roller sponge cores; for insoles, sofa and mattress cushions, automotive headrests and seat cushions; for chest and shoulder pads, elderly fitness equipment, pregnancy back supports and children's pillows; and as soft filling for silicone robots and dolls. It helps OEM buyers produce lightweight, durable parts, simplify assembly and strengthen competitiveness.

Technical Specifications

• Model: HY-F665 (series HY-F662 – HY-F6610, 2x–10x foaming);
• Type: Two-component addition-curing liquid Foamed Silicone (platinum-catalyzed);
• Form: Free-flowing liquid Part A + Part B; liquid translucent, cured white;
• Mix Ratio: A:B = 1:1;
• Mixing Time: 2–3 minutes;
• Expansion Ratio: 5x volume;
• Foam Structure: Uniform micropores;
• Hardness: 7–13 Shore C;
• Density: 0.21 g/cm3;
• Working Time: 3–11 minutes;
• Viscosity: 10000–13000 cps;
• Flame Retardant Grade: UL94-V0;
• Operating Temperature: -65℃ to 200℃;
• Safety: Non-toxic, non-corrosive, non-radioactive, chemically inert;
• Packaging: Part A 25 / 200 / 250 kg drums; Part B 20 / 25 / 200 kg drums;
• Transport: Non-dangerous goods; store sealed, cool and dry.

Certifications & Compliance

Our Liquid Silicone Foam meets international standards: ISO 9001 (strict quality control), UL and CE Certification, satisfying global sealing, cushioning and foam industry requirements. Quality is assured by pre-production samples approved before mass production and final inspection before every shipment — trusted by OEM and procurement partners worldwide.

Customization Options

We provide OEM-grade customization: adjust hardness, density and packaging to your part design; choose from the HY-F662–F6610 series or tune expansion, pore uniformity and rebound for seals, cushions or filling; and scale smoothly from sampling to container-volume production with a lead time of about 1 month.

Production Process & Quality Control

We follow a strict 5-step quality control process: high-purity silicone raw materials screening, precision automated mixing, performance testing (expansion ratio, pore uniformity, shrinkage, rebound, temperature resistance), curing verification and sealed packaging. With 20 production lines, we ensure stable global supply; the product is non-hazardous and shipped as general cargo.

About HONG YE JIE - Company Profile

Shenzhen Hong Ye Jie Technology Co., Ltd., brand HONG YE SILICONE, is a manufacturer specializing in the R&D, production and sales of silicone rubber. Established in 1998, with affiliated operations including Hong Kong Hong Ye Ltd. and the Shenzhen Hong Ye Jie and Huizhou Hong Ye Jie Technology Co., Ltd. factories (set up in 2005), the company has grown into one of China's leading silicone rubber exporters. Recognized as a global manufacturer of RTV-2 silicone rubber, we produce hundreds of silicone products — RTV-2 molding silicone, HTV silicone rubber, Liquid silicone rubber, Pad Printing Silicone, Electronic Potting Compound, Human Body Silicone and more — and were the largest exporter of liquid silicone rubber in China in 2014, serving customers in more than 138 countries and regions across 7 continents. With an experienced R&D team and a multilingual sales team of 51–100 employees, we supply stable, first-class quality at competitive prices, backed by ISO 9001, UL and CE certifications, 20 production lines and full OEM support.

FAQ

Q: What is the correct mixing ratio?

A: Mix Part A and Part B at 1:1, stir for 2–3 minutes, vacuum-degas and use promptly.

Q: What is special about HY-F665?

A: It offers a balanced 5x expansion with 0.21 g/cm3 density — soft enough for cushioning, firm enough for sealing parts.

Q: Do you provide samples before mass production?

A: Yes — pre-production samples are approved before mass production, with final inspection before shipment.

Q: What is your lead time?

A: About 1 month in both peak and off-season, supporting stable production planning.

Q: What payment methods do you accept?

A: T/T (telegraphic transfer) and L/C (letter of credit) are accepted.