Definition & Core Function
Sponge Dock Seal is a sealing accessory made primarily of sponge material, installed along the edges of doors or door frames. It fills gaps through elastic compression to achieve:
Soundproofing, Dustproof & Waterproof: Blocks external noise, dust, and rain from entering indoor spaces.
Thermal Insulation: Reduces air exchange between indoors and outdoors, helping to save energy for air conditioning or heating.
Impact Cushioning: Reduces impact when closing doors, protecting both the door and the frame. Due to its low cost and easy installation, sponge dock seals are widely used in residential buildings, offices, hotels, and light industrial settings.
Core Materials & Structure:
Sponge Type: PU Sponge (Polyurethane)
Advantages: High elasticity, adjustable density, suitable for applications requiring strong sealing (e.g., equipment doors).
Disadvantages: Prone to mold when exposed to moisture for long periods, requiring a waterproof coating.
Auxiliary Structure:
Adhesive Backing Layer: Uses wooden or steel frames for easy and secure installation.
Metal/Plastic Slots: Some models require embedding into door frame slots for enhanced durability.
