D-Profile Silicone Foam Seal Strip | Closed Cell Silicone Sponge Gasket

Product Overview

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

With a D-shaped profile featuring a flat base and rounded sealing surface, this silicone foam gasket provides effective compression sealing for small to medium gaps while maintaining excellent flexibility and recovery performance.

It is widely used in industrial equipment, electrical enclosures, HVAC systems, automotive components, and outdoor applications where long-term sealing stability and environmental resistance are required.

Key Features

• Closed-cell silicone foam structure for reliable sealing and insulation performance
• Temperature resistance from -40°C to +200°C
• Low compression set for long-term sealing stability
• Excellent vibration damping and elasticity recovery
• Resistant to UV, ozone, weathering, and aging
• D-shape profile optimized for compression sealing applications
• Suitable for small and medium gap sealing depending on size
• Available with optional PSA adhesive backing for easy installation

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: Multiple sizes available
• Gap Compatibility: Small to medium gap sealing (depending on profile size)
• Compression Application: Low to medium compression sealing
• 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: 10m sample rolls; 50–100m bulk rolls
• Adhesive: Optional pressure-sensitive adhesive (PSA) backing
• Color Options: Red / White / Custom Colors (appearance only, performance depends on material grade)

Length Selection Guide

Silicone seal strips are available in different lengths depending on profile size, application requirements, shipping method, and order quantity.

• Standard lengths: Most specifications are available in common lengths such as 1 m, 3 m, and 10 m, suitable for sample testing, replacement parts, and regular applications.

• Large profiles: Due to their larger dimensions and shipping requirements, some long-length options may be limited by standard transportation methods. These profiles can be shipped by express, air freight, or sea freight according to customer requirements.

• Bulk orders: For wholesale orders and engineering projects, we offer longer rolls, custom lengths, and production quantities based on project requirements.

• Custom production: If a requested size or length is not currently listed, we can manufacture it using our existing extrusion tooling. Additional tooling charges may not apply when suitable existing tooling is available.

Please select the available length option for each specification. For special lengths, bulk orders, or customized requirements, please contact us for a suitable solution.

Application

• HVAC equipment sealing
• Electrical enclosures and control cabinets
• Industrial machinery vibration sealing
• Automotive sealing systems
• Outdoor equipment protection
• Electronic equipment cushioning and sealing

Installation

• Clean and dry the installation surface before application
• Cut the strip to the required length
• Apply firm pressure for PSA adhesive-backed versions
• Allow sufficient bonding time for adhesive curing

Why Choose Closed-Cell Silicone Foam?

Closed-cell silicone foam provides excellent resistance to moisture absorption, temperature changes, UV exposure, and aging. Compared with open-cell foam materials, it offers better sealing performance in applications requiring environmental protection and long-term durability.