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Silicone Foam Seal Strip | D-Shape Closed-Cell Gasket for Thermal & Vibration Insulation

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Available in 1m sample rolls, with bulk supply in 50–100 meter industrial rolls. D-shape silicone foam seal strip designed for thermal, acoustic, and vibration sealing applications. Custom sizes and colors available for OEM and industrial use.
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Estimated Delivery Date: Jun 30 - Jun 30
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Closed Cell Silicone Foam D-Shape Seal Strip for Sealing and Thermal Insulation

Product Overview

The closed-cell silicone foam D-shape seal strip is designed for reliable sealing, thermal insulation, and vibration control in industrial applications.

Depending on the selected size, this product is suitable for medium gap sealing, or large gap filling applications, with performance adapted for medium compression, or high compression sealing requirements.

It is widely used in indoor equipment, semi-outdoor systems, or outdoor industrial environments depending on color and specification, where long-term sealing stability is required.

Key Features

• Closed-cell silicone foam structure for reliable sealing performance

• Temperature resistance from -40°C to +200°C

• Low compression set for long-term stability

• Excellent vibration damping and elasticity recovery

• Resistant to UV, ozone, and aging

• D-shape profile optimized for flat compression sealing

• Suitable for medium and large gap sealing applications depending on size

• Performance varies for medium or high compression requirements

• Color variants designed for indoor, industrial, or outdoor exposure environments

• Optional PSA adhesive backing available

Specifications

• Product Name: D-Shape Silicone Foam Seal Strip

• Material: Closed-Cell Silicone Sponge Rubber

• Cross Section: D-Shape (flat base, rounded top)

• Size Range:  Medium / Large (varies by model)

• Gap Compatibility: Medium gap sealing / Large gap filling (depends on size)

• Compression Grade: Medium-duty / Heavy-duty (application dependent)

• Density: 0.3–0.6 g/cm³ (varies by grade)

• Hardness: 10–40 Shore A (depending on specification)

• Temperature Range: -40°C to +200°C

• Length Options: 1m samples; 50–100m bulk rolls

• Adhesive: Optional pressure-sensitive adhesive (PSA) backing

• Color Options: Red / Black / Grey / White (appearance only, non-performance related)

Application

• HVAC systems sealing (medium gap sealing, indoor/outdoor use)

• Electrical enclosures (small gap sealing, low compression use)

• Industrial machinery (medium to large gap vibration sealing)

• Automotive sealing systems (high compression resistance applications)

• Outdoor equipment protection (UV and weather exposure resistant use)

• Precision electronics (low compression indoor sealing)

Installation

•Clean and dry surface before application

•Cut strip to required length

•Apply pressure for adhesive backing (if PSA type)

•Allow 24 hours for full bonding

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