Some sealants contain BPA derivatives though. I'd rather have cavities than xenoestrogens messing up my hormonal system, so any non resin sealant is a great step forward
If the BPA derivative exposure in this sealant is low enough compared to usual daily exposure the benefit of having an effective sealant is too great to overlook. Let's say (for example)usual daily exposure is 1, the sealant adds 0.0000000000000001. Considering how devastating teeth problems can be this cost is a no brainer to pay.