Multi-Cure® Electronic Circuit Board Material


Light and Heat-Cure Conformal Coating

Dymax Multi-Cure® 9-20557 cures in seconds upon exposure to UV/Visible light and is designed for rapid conformal coating of printed circuit boards and other electronic assemblies. The product features secondary heat cure capability which allows the coating to cure in applications where shadow areas exist. In addition, this one-part formulation fluoresces blue for quality inspection. 

This coating has been optimized for coating thicknesses between 51 mic [0.002 in] and 510 mic [0.020 in]. This medium viscosity material, designed to enhance wetting of leads, is suitable for most types of spray equipment. The low modulus of 9-20557 allows it to excel in coating applications where thermal shock performance is critical.

Dymax materials have no solvents added 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.

Multi-Cure® 9-20557 is UL 94 Flammability V-1 rated, MIL-I-46058C listed, and IPC-CC-830-B approved and in full compliance with the RoHS2 Directives 2015/863/EU.


  • Cures with UV/Visible light
  • Multi-Cure - secondary heat cure
  • Fluoresces blue under black lights
  • Low VOCs
  • Medium viscosity to enhance wetting leads
  • Suitable for most types of spray equipment
  • Isocynate free
  • One part formulation - no mixing
  • Meets MIL-I-46058C
  • IPC-CC-830-B approved
  • UL 94 Flammability V-1 rated
  • UL 746 Recognized

Typical Properties

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Property Values
Viscosity (nominal) 2,300 cP
Cured appearance Clear
Fluoresces Yes, blue
Recommended substrates Lead frame; Ceramic; PCB; Flex; Silicon

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Removing 9-20557

The micro sandblaster precisely removes the coating in just seconds without damaging the board surface or surrounding components. Removal method: IPC 7711/7721 Micro Blasting. Equipment: Crystal Mark Inc. Model CCR-CWC-LV-1 using #25A Carbo Blast Electronics Grade Blast MEdia at 40 psi.

Light-Curable Conformal Coatings

Dymax light-cure conformal coatings have been used to protect printed circuit boards for over 40 years in many high-reliability applications, including military, aerospace, consumer electronics, medical, automotive, appliance, and telecom applications. Our conformal coatings are designed to streamline the assembly process, curing tack free in seconds upon exposure to light. Manufactures can apply, cure, and ship immediately, eliminating time-consuming steps associated with other types of conformal coatings.

BCE Application Engineers support all your technical requirements.

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