👉 A joining fluid, also known as a coupling agent or sealant, is a specialized liquid used to create a watertight seal between two surfaces that might not be perfectly aligned or compatible. It acts as an intermediary layer, filling in gaps and irregularities to ensure a tight, durable connection. These fluids typically have excellent adhesive properties, chemical resistance, and can withstand various environmental conditions, making them crucial in applications such as plumbing, automotive, aerospace, and industrial machinery where leak-proof connections are essential. Common types include silicone-based, epoxy-based, and polyurethane-based fluids, each chosen based on specific requirements like temperature range, chemical exposure, and mechanical stress.
