A Unique Coating Product

Liquid Vinyl is manufactured by suspending vinyl resin in an acrylic emulsion using a process called emulsion polymerization. It goes through a curing process after it is applied where solid matter suspended in the liquid emulsion moves together to form the vinyl film. Due to the spherical shape of the vinyl particles, minuscule gaps remain between the rounded edges of the vinyl component. These gaps turn out to be very beneficial. Permeability is achieved by creating a mechanism for moisture vapor to pass through the coating by squeezing between the tiny spaces, similar to how a balloon losses air over time. The gaps are large enough for a tiny vapor particle to pass but too small for a water molecule to penetrate. This makes the Liquid Vinyl film both waterproof and breathable. Liquid Vinyl Siding is classified as a 'highly permeable' membrane with a rating of 15.3 perms.

permeable film
permeable film

Other key components are formulated into the vinyl to give it additional beneficial advantages. Titanium dioxide, a crystal that stabilizes color and reflects heat causing rays from the sun is added for energy efficiency and to prevent chalking. Mildew inhibiting components are also added. The unique chemical composition of Liquid Vinyl Siding gives it properties that make it an truly exceptional coating.

breathable coating
permeable wetpermeable dryingpermeable cured

In the EMULSION POLYMERIZATION PROCESS, emulsifiers are used to disperse vinyl chloride monomer in water. Emulsion polymerization produces very fine non-porous grains in the range of 1 micron creating the advantage of a vinyl coating without a graininess surface. Surfactants are used in the polymerization of vinyl chloride to increase the surface tension and conductivity until it reaches the critical micelle concentration (c.m.c). At this stage, the emulsified molecules are arranged in way that their hydrophilic groups are at the outer space contacting with water, and hydrophobic groups are gathered inside the micelle. Most of the vinyl chloride monomer droplets get dispersed in the micelle using water soluble free radical initiators.

The Perm Rate is defined as the 'RATE OF FLOW OF A GASEOUS LIQUID THROUGH A POROUS MATERIAL'. ( also referred to as permeability )

The scientific measurement is 1 grain of water vapor per hour, per square foot, per inch of mercury measured in units called Perms.  1 US Perm (0.659045 metric perms)=57.2135 ng.s‑1.m‑2.Pa‑1