Material
Silicone Rubber
Silicone Rubber is selected from its stiffness, recovery, wear, wet-service, chemical, and temperature behavior. Stiffness is set by the complete filament specification, including material, diameter, free trim, density, grade, and service conditions.
Material Overview
Silicone rubber is an elastomer family valued for elastic recovery and weathering; standard and fluorosilicone grades have different fluid resistance.
In a finished brush, Silicone Rubber does not create a fixed stiffness by itself. Filament size, exposed length, density, tuft layout, and contact setting control the brush feel, while grade and service conditions control long-term behavior.
Material Properties
| Hardness | 20–80 Shore A |
|---|---|
| Density | 1.1–1.3 g/cm³ |
| Use temperature | -50–200°C |
| Water absorption | below 1% |
| Compression set | 5–30% by grade |
Brush Applications
For Silicone Rubber, directly related brush structures include Handheld Detail Brushes, Tube & Pipe Bore Brushes, Bottle & Container Brushes, and Disc Brushes. Applications related to Silicone Rubber include Bottle & Container Cleaning, Cup & Mug Cleaning, Hydration Bag Cleaning, and Laboratory Tube Cleaning.
Specification and Customization
Material form
Strip / Molded Component
Common forms
Rubber strip; silicone component.
Grade
Silicone-rubber hardness and cure system specified separately
Reference standard
ISO 37; ASTM D412; ISO 48-4; ASTM D2240-15(2021); ISO 4892-3:2024; ASTM G154-23; UL 94
Limitations and Alternatives
Not for aggressive scraping, rust removal or metal deburring.
Frequently Asked Questions
What are the key properties of Silicone Rubber brush material?
Silicone rubber is an elastomer family valued for elastic recovery and weathering; standard and fluorosilicone grades have different fluid resistance. Direct data: Hardness: 20–80 Shore A; Density: 1.1–1.3 g/cm³; Use temperature: -50–200°C; Water absorption: below 1%; Compression set: 5–30% by grade.
Where is Silicone Rubber used in cleaning brushes?
Heat-tolerant soft contact, bottle cleaning and squeegee functions in kitchen, laboratory and wet-process tools.
How does filament geometry change Silicone Rubber brush stiffness?
Silicone Rubber changes brush stiffness through filament diameter, free trim, density, crimp, and contact. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.
When should Silicone Rubber be replaced by another material?
Compare Silicone Rubber with PP, TPE, Nylon. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.
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