Easy-Cast Foamed Silicone for Soft Filling Applications

Product Overview

HY-F667 is the low-viscosity, high-expansion member of our HY-F662–F667 liquid silicone foam family, developed for parts that must be easy to cast and very light once cured. As a specialist producer of Mold Making Silicone, RTV-2 silicone and Silicone raw materials, we tuned this grade for smooth flow, uniform rise and gentle softness: fine even pores, low shrinkage, dependable rebound and a fluid 3000–5000 cps working viscosity that fills intricate molds without pressure. It cures at virtually any thickness, resists migration and compression set, and stays flexible from -65℃ to 200℃ — helping procurement partners cast lightweight parts quickly with less labor and material cost.

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.

Key Features & Advantages

1. Easy-Cast Low Viscosity: 3000–5000 cps flows readily into complex molds and cavities — simpler mixing, fewer air traps, faster production.
2. Ultra-Light 8x Expansion: At 0.135 g/cm3, finished parts are remarkably light, cutting material use and shipping weight.
3. Soft, Uniform and Stable: Fine uniform pores and low linear shrinkage keep parts consistent in feel and size, with no migration or post-cure shrinkage.
4. Safe and Broad-Temperature: Non-toxic, non-corrosive, non-radioactive and chemically inert; flexible from -65℃ to 200℃, 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 protective packaging and in-place filling of delicate components; for insoles, mattress toppers, sofa and seat cushions and chair pads; for chest and shoulder pads, pregnancy back supports and children's pillows; for seals, gaskets, weather strips, foam boards and tubes; and as soft filling for silicone robots and dolls. It helps OEM buyers cast lightweight, comfortable and durable parts faster, cut material and labor cost and strengthen competitiveness.

Technical Specifications

• Model: HY-F667 (series HY-F662 – HY-F667， 2x–7x 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: 7x volume;
• Foam Structure: Uniform micropores;
• Hardness: 2–10 Shore C;
• Density: 0.135 g/cm3;
• Working Time: 3–5 minutes;
• Viscosity: 3000–5000 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 packaging, 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, viscosity, pore uniformity and rebound for casting, filling or cushioning; 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.

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 makes HY-F668 different?

A: It combines a low 3000–5000 cps viscosity for easy casting with 8x expansion and an ultra-light 0.135 g/cm3 density.

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.