Blank A4 Masking Sheets for Conformal Coating

Rubber-based masking sheets designed for secure adhesion and clean removal during liquid conformal coating processes.

These blank A4 masking sheets provide a flexible, fast, and highly cost-effective masking solution for liquid conformal coating and electronics coating processes where custom shapes, non-standard geometries, or rapid turnaround are required.

Operators can cut bespoke masking shapes directly from the sheet using a scalpel, die cutter, plotter, or template. This enables precise masking of connectors, edge fingers, apertures, test areas, irregular components, and defined keep-out zones, helping prevent unwanted coating build-up and supporting consistent coating quality.

Why choose blank A4 sheets instead of pre-cut dots or rolls?

• Total flexibility: cut any geometry needed, including irregular or non-standard shapes.
• Faster setup in high-mix work: ideal for prototypes, engineering trials and frequent design changes.
• Cleaner workflow: flat A4 sheets are easy to store, handle and keep contamination-free at the workstation.
• Reduced waste: cut only what you need, when you need it.
• Short lead times: supplied as standard blanks for rapid turnaround.

Pack format and pricing

Supplied in packs of 25 A4 sheets.for ease of use. Price breaks are available when ordering multiple packs, with discounted pricing applied. Call the office now.

Typical applications

• Cutting custom masking shapes where standard dots or pre-cut formats are unsuitable
• Producing bespoke masking for irregular geometries, apertures, slots and complex outlines
• Rapid prototyping, design iteration and engineering trials
• High-mix, low-volume production environments requiring frequent changeovers
• Creating multiple dot sizes or strip formats from a single sheet stock
• Temporary or short-run production where tooling or die-cut parts are not economical

Notes for best results

• Apply to clean, dry surfaces for best adhesion and clean removal.
• Burnish edges after placement to reduce capillary ingress during coating.
• For repeatable shapes, use a simple template or cutting guide at the workstation.

Material and process guidance

These masking sheets are optimised for liquid conformal coating applications, providing secure hold during coating and curing while supporting clean, residue-free removal.

For high-temperature processing, vapour deposition, or Parylene masking requirements, polyimide-based materials (e.g., Kapton formats) are typically recommended. If you are unsure which material is best for your process, send us details of the area to be masked and we’ll advise.