Look for sex toys made of 100 percent medical-grade silicone, borosilicate glass, medical-grade stainless steel, or polished natural stone (ex: quartz). Ensure all of these are clearly labeled as such to avoid a mixture of mystery materials.
Next you must spray the toy with a silicone conformal coating, letting it dry 20 minutes in between each of the 3-4 total coats. ... “I believe that the basic sex toys we provide are safe to use ...
The 3d-printed sex toy website (which I've forgotten) recommends spray-on silicone "conformal coating". I doubt that you'll find that product with a food safe guarantee, but realistically its probably not going to kill you.
The Ride Bodyworx Silicone Lubricant is priced averagely when compared to the other lubes on this list. Pros: Ultra-concentrated, long-lasting, paraben free, glycerine free, hypoallergenic, non-toxic, waterproof. Cons: It’s a little harder to clean up after use than the other options on this list.
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Another option is the silicone conformal coating spray that I saw recommended for making 3d printed sex toys. I doubt conformal coat is going to come with a food grade cert, but in truth it'd probably OK.
* Worked in a high pressure environment, developing public health training, informational exercises and documentation on safe sex, birth control and other sex and gender related medical issues.
Looking for some advice/ideas on sealing a large 3d printed part so its water-tight. Need a spray, or maybe brush-on material that will dry smooth, but can be applied to something that is an irregular bowl-shape (each side of the inverse mold to cast a human head). Typical printed ABS is slightly porous at each layer, so fluids tend to seep inside.
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