If it is bonded, it is completely non-toxic after curing for 24 hours. Don't worry. In fact, the crux of the problem is: model 502 is only a low-end product in quick-drying adhesive, so it should not stand blisters, right? In addition, its maximum operating temperature range is only 82 degrees. Where do you use it to bond? Boiling water 100 degrees, even if it is cooled to the optimal tea temperature, it is 80 degrees. Do you think it's appropriate?