Agreed, I've picked up some things from DIY stores in the UK that required full respirators, I don't understand the allegation that it won't go to market in the UK.<p>Hell, superglue is likely as hazardous if used improperly. I've seen cotton overalls lit on fire by someone dumping a bottle, and I was handed it in primary school! Cement is dangerous to the skin and lungs, especially mixing dry cement as the lime can actually cause chemical burns to your lungs, or you can develop silicosis over longterm exposure, hence face-masks.<p>There'll obviously be precautions that have to be taken. However it all depends on droplet size formed by the spray. A fine spray is unlikely to reach or coat a surface appropriately, so I'm assuming a heavier spray intended to coat a specific area. This means larger droplets and less spread of the spray, it also decreases the likelihood that it'll get through a face mask making a respirator less likely.<p>If it can be used with a simple face mask, it'll be on sale in the UK without a doubt.