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Masking options
Technological Process
Quick masking guide we use — pick by feature and process:
- Threads/internal bores: silicone or nitrile threaded plugs; PTFE tape for small threads.
- Precision mating faces: laser‑cut PSA polyimide/PET masks.
- Small holes/slots: preformed cork/foam plugs or liquid peelable mask.
- Weld seams during plating: high‑temp silicone tape or braided fiberglass tape.
- Blind cavities: water‑soluble peelable mask (easy rinse).
- High-temp processes: silicone plugs or PTFE materials only.
- Post‑process checks: IPA wipe residue test, visual, and salt‑spray verification if required.
During chemical and surface treatments (anodizing, plating, phosphating, painting, etc.), functional surfaces (threads, precision mating faces, blind holes, etc.) can be contaminated by process fluids or residues, causing assembly problems, corrosion, or failure. Proper masking protects critical features, reduces rework, increases yield, and ensures reliable field assembly.
Recommended masking by feature
Threads / internal bores
Materials: silicone or nitrile (NBR) threaded plugs; PTFE tape for small threads.
Use when complete isolation is required or to prevent fluid ingress. For high‑temperature processes, choose high‑temperature rated materials.Precision mating faces
Materials: laser‑cut PSA masks (polyimide/Kapton or PET films).
Use for flat or regular surfaces that require residue‑free edges and clean removal.Small holes / slots
Materials: preformed cork or foam plugs; liquid peelable mask (water‑soluble).
Use for irregular or fine through‑holes that are difficult to seal mechanically.Weld seams during plating/coating
Materials: high‑temperature silicone tape or braided fiberglass tape.
Use where heat or aggressive chemicals are present and residue must be avoided.Blind cavities / complex internal geometries
Materials: water‑soluble peelable masks or liquid peelable coatings.
Use when removal of solid plugs is impractical — prefer easy rinse‑out solutions.High‑temperature processes
Materials: high‑temperature silicone plugs or PTFE materials.
Use only materials that will not decompose, migrate, or contaminate the part at process temperatures.
This guide lists recommended masking solutions by feature and process, application tips, and verification methods for engineering and quality teams.
