Equipment Selection for Coatings and Sealants

Choosing the right application method for coatings and sealants is critical to achieving a durable, consistent, and protective finish. Each spraying method is designed for different materials, surfaces, and performance requirements. Understanding the differences between low pressure, high pressure, and electrostatic spraying will help ensure the best results for your project.

Low Pressure Spraying: Low Viscosity Materials

Low pressure spraying is best suited for low viscosity coatings, where the material flows easily and requires less force for application. This method is often used for thin coatings or sealants that need an even, controlled finish without excessive buildup. It provides efficiency and cost-effectiveness while minimizing waste.

High Pressure Spraying: High Viscosity Materials

High pressure spraying is the method of choice when working with high viscosity coatings. These materials are thicker and more resistant, requiring greater force to atomize and distribute evenly. This method excels in applying protective coatings that shield surfaces from corrosion, weather, and wear.

From bridges and ships to water towers and roofs, high pressure sprayers deliver the strength needed to keep metal, wood, and concrete surfaces protected. The advantage lies in their ability to apply low VOC and abrasive coatings with precision—ensuring long-lasting performance.

Electrostatic Spraying: Low Viscosity and Low Solids

Electrostatic spraying takes application technology a step further by using charged particles to maximize coverage. In this method:

1. Atomized droplets pass an electrode inside the nozzle, gaining a negative charge.

2. These droplets reverse direction and move against gravity, coating even hidden surfaces.

3. Since most surfaces naturally carry a positive charge, the droplets are magnetically attracted, creating a wrap-around effect.

Electrostatic spraying is especially effective for low viscosity, low solids materials, and is widely used in agricultural, industrial, and commercial settings where uniform coverage and efficiency are essential.

Learn more by watching this extract from our Passive Mold Remediation Boot Camp.