FWIW, & it may not apply to the OP exactly but I've had good luck with a smear of Shoo-Goo on problematic sidewalls. It's made to adhere to latex rubber shoe soles. Since tubeless sealant and many tires have a strong latex content the 2 products seem compatible for bicycle use.

I don't see how it's a big deal to let the sealant dry, rub off all that will come off & then apply Shoo-Goo in whatever rubber area needs a little extra help. If it's co-opted to help a bacon strip so so much the better.

(I've also glued down a patch of rip-stop nylon for emergency sidewall repair to good effect. Tubed, of course.)