what is the active ingredient? is it amorolfine?

I believe the active ingredient is lactic acid. My recollection from Intro to Biology is that lactic acid is an enzyme that dissolves keratin.

Do you apply this and then put a band aid over it and change it every day?

You wash the nail and apply it once a day. No band-aid. I applied it just like Teri did, at night just before bed.

Is it better if you do not polish your nails

You can use breathable nail polish!

does it help to prevent toe nail from splitting?

Im not sure I only used it for some cracks and creases that I had on the upper layer, this worked for me to remove the upper layer and now my nails are flat and like new again.

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KerasalNail Fungus Extra Strength | Restorative Nail Repair for Damaged Nails, 0.33 fl oz (Packaging May Vary)

KerasalNail Fungus Extra Strength | Restorative Nail Repair for Damaged Nails, 0.33 fl oz (Packaging May Vary)

Product ID: 727565750

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Details

Brand
Kerasal
Item Form
Liquid
Item Weight
0.01 Ounces
Liquid Volume
0.33 Fluid
Specialty
Damaged Nail

⏳Visible results in 2 days

🎯Precision tip for targeted application

🧪Dermatologist-developed formula with urea & lactic acid

Description

💅 Restore your nails, reclaim your confidence.

PRECISION PERFECT - Target fungal damage exactly where it counts with a mess-free, easy-to-use precision tip—daily care made effortless.
CLINICALLY TRUSTED - Backed by 10+ million users and dermatologist expertise since 2010, ensuring safe, effective nail restoration without harsh chemicals.
MULTI ACTION FORMULA - Gently exfoliates, hydrates, and smooths to reduce thickness, ridges, and discoloration—your all-in-one nail care essential.
FAST TRACK NAIL REVIVAL - See noticeable clarity and smoothness in as little as 48 hours—because your nails deserve a glow-up now.
CONFIDENCE IN EVERY SWIPE - Join the 90% of users who saw improved nail appearance in just 8 weeks—don’t let damaged nails hold you back.

Kerasal Nail Fungus Extra Strength is a dermatologist-developed restorative treatment that visibly improves nail clarity, smoothness, and thickness caused by fungal damage. Featuring a precision tip for targeted application, its formula combines urea and lactic acid to exfoliate and hydrate nails gently. Trusted by over 10 million users since 2010, it delivers noticeable results in as little as 2 days and clinically improves nail appearance for 90% of users within 8 weeks—without harsh chemicals or dyes.