9-20479-B: Ultra Light-Weld^®
Peelable Mask for Electronic Applications

Ultra Light-Weld^® 9-20479-B is a blue masking material that cures in seconds when exposed to UV/Visible light. This peelable mask is designed for rapid masking of electronic components and assemblies to protect from reflow or wave soldering operations, and shield keep-out areas during conformal coating applications. Ultra Light-Weld 9-20479-B is extremely thixotropic for manual or automated dispensing on boards or components that may be difficult to mask with other methods. This mask is solvent free, silicone free and does not contain VOCs. Cured masks withstand wave solder and reflow temperatures and is easily removable , eliminating the concern of ionic contamination or silicone left behind by other masking methods.

	Download the 9-20479-B Product Data Sheet
	Request MSDS
	9-20479-B Halogen-Free report (Registration required)

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 light curing spot lamps, focused beam lamps, or flood lamps, 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. This product is in full compliance with the RoHS Directives 2002/95/EC and 2003/11EC.

Max says if you don't see an adhesive that suits your application, call DYMAX Applications Engineering for a recommendation. We have a library of over 3,000 adhesive formulations to choose from!