I understand your concerns but I don't believe there is anything dangerous about it. Once the cement is cured, it doesn't come off so I know he can't ingest any of it. There are no sharp edges to hurt the snake. It has a very tight fit and is secured to the tank with silicone, so there is no way he can get behind it. Believe me, I covered every aspect of what could possibly cause any problems. Also this isn't the first one that I made. I've been keeping fish and building aquarium backgrounds for years. So if you are considering building one, just take your time and it will work out fine.