WonderMASK® PX Peelable Solder Mask, 8 oz. Bottle

WonderMASK PX can remain on all areas of the board until ready for a test, and then, be easily peeled away. In addition, WonderMASK PX is ideally suited for situations where a thick coat of mask is required. WonderMASK PX has been specially formulated to cure homogenously, virtually eliminating any limit on the deposition thickness.

WonderMASK PX is not recommended for use on bare copper as it contains a sufficient concentration of ammonia to cause discoloration. For use on bare copper, WonderMASK P (part # 2211) is recommended.

FAQ's

Can a temporary solder mask be left on the PCB permanently?

A temporary solder mask is intended to be just that – temporary. Manufacturers of solder masks, like Chemtronics, always recommend removing the mask because there is no testing to support doing otherwise. If you decide to leave the solder mask on as a permanent part of the PCB, you will have to do your own functional and reliability testing to ensure it does not cause a problem.

How high of a temperature can a temporary solder mask withstand?

The solder mask is engineered to withstand molten solder temperature for a very brief time (about a second) it is exposed in a typical wave soldering process. Most commercially available masks should be able to withstand melting point temperatures of lead-based and lead-free solder, up to 650°F (343°C). As exposure time is lengthened, like in a reflow oven, there is more potential that the mask will bubble, char, and become brittle. How long a mask can withstand extreme temperatures depends on the thickness of the bead and the type of mask.

Does a temporary solder mask leave an ionic residue?

No, a temporary solder mask will not leave behind ionic residue that can lead to dendritic growth and board failure.

*This item is hazardous and will be subject to an additional Hazmat fee.