Dymax SpeedMask 9-20474-B-REV-A Peelable Maskant

Product code: Dymax 9-20474-B-REV-A

Manufacturer: Dymax

Package size: 30g

Shelf Life: 9 months

Blue PCB Protective Maskant with Blue Fluorescent Tracer

SpeedMask® 9-20474-B-REV-A is a blue maskant that cures upon exposure to UV/Visible light for rapid masking of electronic components and assemblies. The product is easily removable, eliminating the concern of ionic contamination or silicone left behind by other methods.

The material is halogen-free, contains no nonreactive solvents, protects electronic parts from reflow or wave soldering operations. This peelable mask protects keep-out areas during conformal coating applications and is compatible with gold and copper pins. 9-20479-B-REV-A is exceptionally thixotropic for manual or automated dispensing on boards or components that may be difficult to mask with other methods.

SpeedMask 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 optimum balance of UV and visible light for the fastest, deepest cures. SpeedMask® 9-20474-B-REV-A is in full compliance with the RoHS2 Directives 2015/863/EU.


  • Blue color for easy visual inspection
  • Halogen free
  • UV/Visible light cure in seconds
  • Exceptionally thixotropic for manual or automated dispensing
  • Compatible with gold and copper connector pins
  • Silicone free
  • Solvent free


  • Masking for conformal coating applications
  • Masking for wave solder or reflow processes


Property Value Test Method
Solvent Content No Nonreactive Solvents N/A

Chemical Class

Acrylated Urethane N/A
Appearance Blue Translucent Gel N/A
Soluble in Organic Solvents N/A
Density, g/ml 1.13 g/ml ASTM D1875
Viscosity, cP (20 rpm) 115,000 (nominal) DSTM502


Property Value Test Method
Durometer Hardness A75 ASTM D2240
Tensile at Break, MPa [psi] 3.37 [490] ASTM D638
Elongation at Break, % 140 ASTM D638
Modulus of Elasticity, MPa [psi] 4.13 [600] ASTM D638


Property Value Test Method
Boiling Water Absorption, % (2 hr) 6 ASTM D570
Water Absortion, % (25C, 24 hr) 6 ASTM D570
Linear Shrinkage, % 1.6 ASTM D2566

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