The Go-to Abrasive…

Thanks to its particles’ monoclinic shape, sodium bicarbonate easily abrades pliable materials without damaging delicate underlying layers and components. And, sodium bicarbonate is water soluble, which makes for easy post-blasting clean-up.

Our customers use sodium bicarbonate across industries to deburr polymers, strip wire insulation, remove epoxy on electronic test probe IDs—and the list goes on.

that is Almost Perfect

Sodium bicarbonate comes with one small annoyance: build-up.  Most abrasive media gradually erodes a blaster’s mixing chamber, output fittings, nosepiece, and nozzle.


Sodium bicarbonate plating in Comco MicroBlaster

Sodium bicarbonate plates at transition points, like: (clockwise from top) the bottom of MicroBlaster’s mixing chamber; the inlet side of the nozzle (0.060″ pictured) and inside the tip of the nozzle (0.046″ pictured).

So, What Do You Do?

Keep a close watch on the abrasive mixture exiting the nozzle. Noticeable reduction of abrasive in the air stream is the best indicator that plating is underway.

Particles tend to plate at four transition points inside the blaster. Clean these points thoroughly. Like plaque, build-up attracts build-up. If any residue remains, the rate of build-up increases, shutting down the system again, only quicker.


Build-Up Removal Guide

Sodium Bicarbonate build-Up removal guide


Don’t Cut the Hose!

All abrasive—including sodium bicarbonate–wears through the hose that connects the handpiece to the blaster.

Ruptured abrasive hose - AccuFlo

Even a slight rupture in the abrasive hose leading from your blaster to the handpiece can cause a “White Christmas” in your lab.

In an attempt to garner full use of the hose, most operators chop off sections where holes develop and reattach the shortened, seemingly good hose. Unfortunately, a visible hole is a red flag that other regions of the hose are thinning. Predicting when these worn spots will erupt is impossible, but Murphy’s Law states that it will happen at the least opportune time.

Reduce downtime (and frustration) by checking the abrasive hose regularly; keeping an extra hose in stock, and replacing the entire hose at the first major sign of wear.


Dig Deeper


Learn more about Comco micro-abrasives


Abrasives are the most significant variable in the MicroBlasting process. Carefully sized and free impurities, Comco micro-abrasives deliver precise and repeatable results. Continue reading 

Learn more about moisture contamination

Moisture Contamination - The Importance of Clean, Dry Air

Very fine abrasives tend to clump inside a blaster when introduced to even a small amount of moisture. Learn how to spot symptoms of moisture contamination. Continue reading 

Before Recycling Abrasive... Read This

Spent abrasive may look as good as the fresh stuff, but it cannot yield the same results. Learn how particles break down, what contaminants hide in your hopper, and the critical detail your job shop may miss. Continue reading 

Get the safety data sheets for Comco abrasives.


A complete listing of safety data sheets (SDS, formerly MSDS) for Comco abrasive products. Continue reading 


Rob in Tech Support


Tech Support is available for the life of your Comco system. If you have questions about performing your own maintenance, we are available to help. Email me or give us a call at 1-818-841-5500.