Borophene Coatings: Fact, Fiction and the Real Chemistry

A recent industry blog set out to expose boron coatings. Its verdict: "borophene" is marketing fiction, and these products are just borosilicate, the glass in your Pyrex dish.

The first half is correct. The second half doesn't survive basic chemistry.

Where they're right

Borophene is a sheet of boron one atom thick. It's grown in a vacuum on a metal surface and breaks down quickly in air. No coating on the market contains it, ours included.

In coatings, "borophene" is simply a marketing term. It signals boron chemistry, the same way "graphene coating" does, but it has little to do with what's actually in the bottle. What matters is the formulation underneath the name, and that's where their argument falls apart.

Claim #1: every boron coating is really borosilicate

This was asserted without a single SDS, lab result or formulation to back it up.

Borosilicate is made by melting boron oxide and silica together at well over 1000°C. You can't dissolve it in a solvent and wipe it on a car. Boron gets into a coating in other ways, and in ours it's amorphous boron.

Even if it were borosilicate, that wouldn't be the insult they think it is. Borosilicate is used in lab glassware because it survives acids, alkalis and heat for decades.

Claim #2: borophene would degrade before you finished applying it

This one sounds convincing until you look at what's actually in the bottle.

Half true, fully misapplied. Pure borophene does oxidise in air, and nobody disputes that. The researcher who led the leading work on this put it plainly: take borophene out of an ultrahigh vacuum and it oxidises straight away. But no coating contains pure borophene sheets, so a coating can't fail for that reason. They've debunked something nobody is selling. 

Reacting with oxygen and moisture is the point. Polysilazane cures by reacting with moisture and oxygen in the air. That reaction isn't degradation. It's how every polysilazane coating turns from liquid into a hard glass layer. By their logic, every polysilazane coating on the market "degrades before you finish applying it."

Amorphous boron is stable in air. It's elemental boron without a crystal structure, and at room temperature it's protected by a thin surface oxide. It's handled and stored as a powder in normal conditions. In a coating, that oxidised surface is useful: it gives the boron something to bond with as the glass network forms.

The honest summary: pure borophene is a lab material. Amorphous boron in a polysilazane glass is a coating. Treating them as the same thing isn't science.

The comparison table

Their table puts "boron nitride / borosilicate" up against CNT coatings, and CNT wins almost every row. The problem starts in the column header.

They scored the wrong material. Boron coatings like ours use amorphous boron, not boron nitride as they are not the same material. Amorphous boron is elemental boron with no crystal structure, one of the hardest elements there is. The common form of boron nitride is soft enough to be used as a lubricant. Judging an amorphous boron coating on boron nitride's properties is like reviewing a diesel on petrol figures.

Their other rows don't hold up either:

• Borosilicate "degrading under UV." Borosilicate is valued for exactly the opposite reason: long term durability.
• Electrical conductivity scored as a win. Nobody buys paint protection for conductivity, and at coating loadings CNTs are unlikely to make a cured film meaningfully conductive.
• Hydrophobicity credited to the additive. Water beading comes mostly from the resin's surface chemistry, not the nanomaterial mixed into it.
• No test data behind any row. A table with "Winner" in the last column and no numbers is an opinion.

How amorphous boron and polysilazane work together

Polysilazane is the foundation. It's a polymer with a silicon and nitrogen backbone. On application it reacts with moisture in the air and with the hydroxyl groups on your clear coat, bonding chemically to the paint rather than just sitting on top. As it cures, it converts into a dense glass layer.

Amorphous boron is the reinforcement. Fine boron particles dispersed through the resin add hardness to the cured film. Because boron has no crystal structure in this form, the particles disperse evenly rather than clumping. Their oxidised surfaces can bond into the glass network as it forms. Boron modified silicon ceramics are well studied in materials research for hardness and thermal stability.

The polysilazane bonds and protects, and the boron hardens. That's the whole story, no buzzword required.

A standard worth applying evenly

The same blog says graphene is fine because it can be chemically modified for stability. True, and that's how every graphene coating works. None of them contain pristine graphene sheets.

Boron deserves the same logic: judge the formulation, not the headline.

Proof, not promises

Our coatings are independently tested by SGS & CSIRO under named standards:

• 10H hardness to ASTM D3363 from SGS
• 1000 hours of UV weathering to ISO 4892‑2 from SGS
• Chemical resistance testing underway with SGS and CSIRO, with results published when they land

The bottom line

Be sceptical of buzzwords, and just as sceptical of debunks with no data. Whatever the brand, ask for three things: the SDS, the test reports, and the standards they tested to.