Sanotint

I too have had allergic reactions to hair dye. It is extremely frustrating when you are early 40s and you are 90% or so gray (started in my early 20s). I have tried Sanotint and it is great!! The Sanotint Light doesn't cover my gray very well, but I would recommend starting with that first. Then if it doesn't cover try using the Sanotint Classic. According the individual that I have ordered the product from, he mentioned that the Classic has very little PPD in it. I have used this a few times, no burning, no blisters and it covers the gray pretty well.

Make sure you don't have any Veg. Allergies since both products are veg base.

Good Luck!