The dog flea dip is three times stronger than horticultural lime-sulfur. On the dog stuff they say the active ingredient is sulfurated lime. On the horticultural bottle it says Calcium Polysulfide Which is sulfurated lime. You can make it too, but it’s not easy.
I never tried it, and can’t suggest not following label directions, but it is what it is! I don’t see why not? If you add oil it will kill any overwintering eggs on the tree too,
Look at label i posted link to, for Combination winter spray and use those doses or adjust dosage if using sulfur dip products. Check concentration on label to confirm. Hi Yield Horticultural spray has 28% active ingredients, and most dips have 98 percent, so a little over three times stronger in the dog sulfur dip.
I have seen leaf curl on other trees around me, but have never had it on my trees. I also use copper though, so not sure how effective it will be, but the product is labeled for peach curl, good luck! Remember dormant only, trees must have lost all leaves. it will kill growing leaves.