Many medical devices use silicone tube assemblies for fluid or gas transfer within the medical device. Silicone tubing has many attractive features: low cost, durability, resistance to heat, tolerance of sterilization processes and flexibility. However, tubing requires leak-free connections between the medical devices and the tubing. Because the fit needs must be leak-free and tight, assembling those devices can be slow and labor-intensive. SwellEx™ fluids make silicone hose assemblies fast and easy. The fluid softens and swells the silicone tubing, allowing for fast and simple assembly. When the fluid evaporates the plastic tubing shrinks back to its original size and strength, forming seals that are strong and leak-proof.