WonderMASK W Washable Solder Mask

Sku Number Name Size Units
Per Case
2205-8SQ Wondermask W 8 oz (237mL) 24
2205-G Wondermask W 1 gal (3.8L) 1
Packaging Order minimum case quantity only. Extra shipping fees may apply.
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Quick drying water­ washable mask. Quickly and easily removed with in­line and batch cleaning systems. NOTE: Not for use in closed-loop systems with filtration or DI system.

WonderMASK W has a number of useful applications in PCB assembly:

Thru-hole masking – Prevent soldering open holes in a wave soldering process by covering with WonderMASK. All of the masks listed below are well suited for this application.

Temporary component adhesive – WonderMASK can be used to tack down components on double-sided PCBs.

All Techspray WonderMASK products have the following advantages:

  • Withstands lead-free soldering temperatures up to 640°F (343°C) in wave soldering process
  • RoHS compliant
 

Features & Benefits

  • Water washable
  • Non-corrosive
  • Low odor
  • Nonflammable

Specifications: Meets MIL-STD-2000 paragraph 5.3.18 parts a,b, and d.
Call-outs: HP 8500-4214

Applications


FAQ's

Can temporary solder mask be left on the PCB permanently?

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.

What could cause foaming problems during rinse-off of the water-soluble masks?

Particulates + surfactants during rinse = foam. Check filtration system or drain & recharge the rinse water system as necessary. The particulates may come from various sources, but excess solder flux being rinsed off the boards is a prime culprit. Bacteria in the water can cause foaming. Have a water sample analyzed.

How High of a Temperature Can Temporary Solder Mask Withstand?

Solder mask is engineered to withstand molten solder temperature for the 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 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.

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