Sharp Edge Coverage (SEC)

Sharp Edge Coverage (SEC) technologies have become increasingly important as electronic assemblies grow more compact and complex. Modern components with sharp edges and chip scale packages have even smaller lead frame dimensions and minimal clearances. Because of these geometries, they demand advanced coatings that provide reliable protection where traditional materials often fail. Against this background, SEC offers a targeted solution that addresses the most critical weaknesses such as exposed areas of conventional coatings.

SEC overcomes these challenges by conforming closely to the shape of each component. Instead of slumping or pulling away during solvent evaporation, SEC maintains full coverage, preventing exposed corners and edges. The material forms a tough, highly durable layer with excellent physical and chemical resistance.

SEC can typically be applied in one or two layers using spraying or dispersion techniques. This controlled application ensures stable flow behavior, maintains designated keep‑out areas, and still provides a smooth, levelled surface across the assembly. HumiSeal® products are available in 1 , 5 , and 20 liter pails, ensuring suitable options for both small scale and large scale operations.

Selection of available Products

HumiSeal® 1A33SEC preserves the well‑known characteristics of 1A33 polyurethane, providing excellent chemical and physical protection, making it an ideal choice for applications operating in highly corrosive environments.

HumiSeal® 1B59SEC retains the key properties of the original 1B59 synthetic rubber, offering high‑temperature stability up to 150°C along with excellent flexibility, toughness, electrical performance, and outstanding thermal‑shock resistance.