Can I seal unicorn spit, with a non-toxcic seal, that does not smell?

I have asthma, so when I paint, I go outside. I only use non-toxic paints. I love the fact that unicorn spit is a non-toxic product and without a strong odor. I will add the spit to my canvas. After, putting the spit on a wood table, I knew I would have to seal it. I have bought polyurethane, spray, wipes and tung oil. As soon as I open up the product, the smell bothers me and I really don’t want to use a toxic product over a non-toxic product. Is there anything that I can use to solve this problem? Also, if I spit on glass or metal, will I have the same problem trying to find a product to seal it.

Thanks for your suggestions 😊