Chemicals to treat surging in steam boiler

Most of the people on here do proper skimming of the boiler to remove the oils, so typically no chemicals required.

Others have mentioned using washing soda and skimming.

It is pretty well agreed on here that there isn't a substitute for skimming, which I believe that product you are showing claims.

I'm curious how they claim it removes oil and grease, the only way to actually remove it is to get it out of the boiler.

I'm not a pro, but in my opinion, you don't need to add something when a boiler is surging. You need to remove something, specifically the film on the surface of the water that's making it harder for the steam bubbles to break through. The thicker that film is, the bigger the bubbles have to get before they can break through, so the boiling action is more violent and more water is pushed up the risers.

To remove that film you need to skim the boiler.

Raise the water level up to the level of the skim port, heat the water to just below the boiling point, open the skim port and let the water drain into a large bucket. Keep filling the bucket and emptying it until there's nothing floating to the top. It helps if you add about two ounces of washing soda (aka soda ash) per 100 EDR to the water before skimming, then drain the boiler completely and refill when you're done.

Some of us here like to use SteamMaster tablets or 8-Way, both made by Rectorseal, to maintain the correct pH and hardness and minimize corrosion, but we generally add these after we've taken care of any skimming and/or blow-downs that are necessary to remove grease, oil, sludge or sediment that could hinder performance, and we never use as much as the label says to use.

My comment is based on the product label "removes grease and oil"
The only way to actually do that is to literally remove it, no chemical can actually remove anything in a closed vessel.

I feel their label is misleading at best, it gives people a false sense of security in what is going on with the boiler.

To clarify the answer to the OP's original question, there are no chemicals needed to stop priming and surging.

If you like it have at it, but that chemical doesn't get much, if any, love on this site.

I put the Arm&Hammer in our new boiler, on the first firing,10 years ago, this month. I let it simmer by cycling the power on and off for an hour or so. I then opened the 2 inch full port valve on the skimming port, and with temporary piping connected over to the floor drain, cracked open the manual fill valve. This let the cold feed water stay under the hot washing soda soup, and pushed it slowly out the skimming port. After an hour or so, the water was running cold and clear so I stopped.
I did a couple of 2 hour skims in subsequent weeks, which was made easier by the piping over to the floor drain.
Only last year did I get on the Steamaster train, because of having to clean a rusty residue off the inside of the glass tube weekly.
The tube still stains, but at a much slower rate.
I think Squick is basically a diatomaceous earth which is ”supposed” to absorb the oils, sink to the bottom, and be drained out.
It is really time to devise piping configurations which will collect the oils in a separate part of the wet returns, and periodically be drained off the water column at water line height. maybe the collection point could be in a float LWCO where at every blow down, the oil would be drained.
Think of the time and money which could be saved if the boiler could clean itself without the tedium of watching a constant dribble into a floor drain, or a bucket.—NBC

It could be Labeled organic as it is the skeletons of tiny one-celled creatures, and it is used in fish tank filters.—NBC

The product I looked up was a dry powder. They say there's a "moderate" inhalation hazard, but, under hazardous ingredients, it says, "no hazardous components." ¯\_(ツ)_/¯