Masking

Masking is a critical step in conformal coating, preventing coating ingress into connectors, test points, keep-out zones and other defined areas on electronic assemblies. The right masking approach improves first-pass yield, reduces rework and supports consistent coating quality.

SCH masking products are selected for reliable adhesion during processing, clean edge definition, and residue-free removal. Use the options below to choose the most suitable masking format for your application, production volume, and turnaround requirements.

Choose your masking format

  • Masking Dot Rolls– best for repeatable, higher-volume production where operators require continuous use and consistent application across long production runs.
  • A4 Masking Dot Sheets– best for fast workstation handling, quick dot selection and short lead times, ideal for prototype builds, low-volume production and high-mix manufacturing.
  • Masking Tapes– ideal for edges, larger keep-out zones and linear masking where clean boundaries and lift resistance are essential.

Custom masking sheets & shapes

In addition to standard masking dot rolls, sheets and tapes, SCH offers custom masking sheets and bespoke masking shapes for applications where standard formats are not suitable.

Custom masking is ideal for complex connectors, non-circular features, unusual component layouts or defined keep-out areas that require repeatable, precision masking. Shapes can be produced to match specific component geometries, footprints or design constraints.

Custom masking sheets are manufactured to order and supplied in A4 sheet format. To ensure correct fit and performance, customer requirements are reviewed prior to manufacture, allowing feasibility, lead time and supply to be confirmed before production.

If you cannot see a suitable masking format within our standard range, custom masking provides a flexible and efficient solution without compromising coating quality or process control.

Typical areas to protect

  • Connectors and headers
  • Test points and vias
  • LEDs and optical features
  • Defined PCB keep-out areas
  • Component interfaces and mating surfaces

If you are unsure which masking format is most suitable for your process, start with dot sheets for flexibility, dot rolls for repeatability at scale, and tapes for edge masking. For non-standard requirements, custom masking can be produced to match your exact application needs.