F667 Two-Part Liquid Foam Silicone Rubber for Sealing

author: Hellen

2026-09-03

Product Overview

Foamed Silicone is a two-component addition-curing liquid silicone rubber that expands chemically when the A and B parts are blended. It cures into a soft, ultra-lightweight, and environmentally friendly foam with no thickness limitation and simple operation. HONG YE SILICONE, a trusted manufacturer of RTV-2 silicone rubber and liquid silicone, supplies this silicone foam with stable batch quality to customers in over 138 countries.

Technical Specifications

Composition: Two-part, platinum-cured addition silicone
Mix Ratio: 1:1 by weight
Expansion Ratio: 2× standard; up to 7× maximum
Service Temperature: -65°C to +200°C continuous
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 demonstration | Foam cross-section and cell detail | Finished seals, insoles, and robot filler] [Insert video: Production-line demonstration from mixing to cured part testing]

Product Features and Advantages

Cost-Efficient Foaming — 2× standard and up to 7× maximum expansion means more finished volume from less silicone, improving your margins.
Consistent Foam Structure — Even cell distribution, stable expansion, minimal shrinkage, and reliable rebound for uniform parts.
Lightweight and Soft — Premium elastic hand-feel with no migration or shrinkage during service life.
Safe and Chemically Inert — Non-toxic, non-corrosive, non-radioactive, and stable; suitable for body silicone and skin-contact products.
Proven Wide-Temperature Durability — Maintains soft elasticity from -65°C to 200°C, with strong heat, cold, electrical insulation, and flame resistance.
Production-Friendly — No thickness limits, straightforward 1:1 ratio, and compatibility with manual or automated dispensing.

How to Use — Step by Step

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

Application Scenarios

Sealing Components: Gaskets, sealing pads, foam strips, foam boards, silicone foam tubes, and printer roller sponges.
Automotive and Home: Headrests, gear shift covers, seat cushions, sofa and mattress padding.
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 — complementing mold making silicone and liquid silicone workflows.
Electronics: Lightweight damping and filling alongside electronic potting compound applications.

Buyer Benefits: Lower material costs through high expansion, more consistent output 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 foamed silicone meets recognized international safety and environmental standards for easier global market access.

Customization Options

We offer 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. Supported by 48 production lines and 23+ years of silicone expertise.

FAQ

Q: How do you ensure batch-to-batch consistency? A: We use precision batching and strict laboratory testing for viscosity, expansion ratio, and hardness on every batch, ensuring consistent performance.

Q: Can the product be pigmented? A: Yes. Standard colors and custom color matching are available to meet your branding or application needs.

Q: Is a food-grade version available? A: Yes. We manufacture specialized food-grade formulations. Please specify your compliance requirements when requesting a quotation.

Q: What packaging options do you offer? A: Component A is available in 25/250/200 kg drums and Component B in 20/25/200 kg drums, suitable for both prototyping and volume production.

Q: How is the product shipped? A: Transported as non-hazardous goods in sealed containers. Store in a cool, dry place away from direct sunlight and high temperatures.

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