Trimmable, Yellow Fluorescing Maskant

Light-curable SpeedMask® 731-REV-A maskant offers excellent surface protection of components during vibratory finishing, plating, shot-peening, anodizing, and also aggressive grit-blasting operations. The product helps with the manufacture, overhaul, repair, rework, and surface finishing of metal components used in aerospace engine (turbines, vanes, blades), orthopedic implant, and general masking applications. SpeedMask® 731-REV-A maskant is bright yellow before cure enabling visual confirmation of material placement onto substrates. After cure, the material fluoresces bright yellow under black light for easy quality inspection.

This 100% organic thixotropic gel is sprayable onto components, exhibits high adhesion, and cures quickly. The masking resin is trimmable after cure, is easily peeled off a with a hot-water soak, and leaves no residue on surfaces when properly cured. Recommended substrates include nickel alloys, steel, stainless steel, aluminum, titanium, and cobalt, as well as glass.

Dymax materials are solvent free and cure upon exposure to light. Their ability to cure in seconds results in lower processing costs. When cured with Dymax UV light curing spot lamps, focused beam lamps, flood lamps, or conveyor systems they deliver optimum speed and performance for maximum efficiency. Dymax lamps offer the ideal balance of UV and visible light for the fastest, deepest cures. SpeedMask® 731-REV-A maskant is in full compliance with the RoHS2 Directives 2015/863/EU.


Viscosity (nominal):  18,000 cP

Shore Hardness:  D55

Modulus of Elasticity MPa [psi]:  28 [4,200]

Cure Time*:  70 seconds

*Cure time based upon Dymax 5000-EC Light Curing Flood Lamp System (200 mW/cm2)


  • Plating
  • Vibratory finishing
  • Anodizing
  • Aggressive grit blasting
  • Shot peening


  • UV/Visible light curing
  • Excellent surface protection
  • Fast curing
  • Easy peel off after hot-water soak
  • Thixotropic gel
  • High adhesion
  • Sprayable
  • High-visibility yellow color
  • Fluoresces yellow

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