When eventually washed off, the aerogel is handily broken down by soil microbes.
I am not going to claim to be an expert on any of this BUT that wording sounds suspiciously like bullshit. Maybe it’s not, but it’s one of those phrases that sounds like when vitamin companies claim that more B12 has shown to fix whatever ails you. Or “our plastic is environmentally friendly: 100% recyclable, and breaks down into teeny micro-particles over time, and gets absorbed by the sea life like ordinary sand…”
One of my best friends lost her place of living when her boyfriend of 4 years said the relationship had actually ended in his head 2 years previously, but he needed the rent. But then he found a new girlfriend to grift from, “opened the relationship,” and they edged my friend out. I am still mad they did that to her; she was so heartbroken and damaged from that.