Material
Silicone
Silicone is selected from its stiffness, recovery, wear, wet-service, chemical, and temperature behavior. Do not select stiffness from the material name alone. Specify filament diameter, free trim, density, grade, and service conditions as one set.
Material Overview
Silicone is used in molded bristles, blades and flexible profiles whose hardness and chemical compatibility are defined by the cured compound.
In a finished brush, Silicone does not create a fixed stiffness by itself. The brush response is shaped by filament geometry, fill density, tuft pattern, and interference, then modified by moisture, temperature, and chemical exposure.
Material Properties
| Hardness | 20–80 Shore A |
|---|---|
| Density | 1.1–1.3 g/cm³ |
| Use temperature | -50–200°C |
| Water absorption | below 1% |
| Profile diameter | 0.5–10 mm |
Brush Applications
For Silicone, directly related brush structures include Handheld Detail Brushes, Tube & Pipe Bore Brushes, Bottle & Container Brushes, and Disc Brushes. Applications related to Silicone include Bottle & Container Cleaning, Cup & Mug Cleaning, Hydration Bag Cleaning, and Laboratory Tube Cleaning.
Specification and Customization
Material form
Bristle / Molded Body
Common forms
Silicone bristle or body.
Grade
Food, medical or industrial silicone grade as specified
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 brush material?
Silicone is used in molded bristles, blades and flexible profiles whose hardness and chemical compatibility are defined by the cured compound. Direct data: Hardness: 20–80 Shore A; Density: 1.1–1.3 g/cm³; Use temperature: -50–200°C; Water absorption: below 1%; Profile diameter: 0.5–10 mm.
Where is Silicone used in cleaning brushes?
Molded soft-contact fins, bottle heads and wiping tools that benefit from easy cleaning and elastic recovery.
How does filament geometry change Silicone brush stiffness?
Silicone 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 be replaced by another material?
Compare Silicone 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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