butter LONDON Base Coat Nail Strengthener — Horse Power fortifying primer with biotin

butter LONDON Horse Power Basecoat is a strengthening primer formulated with horsetail extract, biotin, vitamin B and calcium to help fortify and improve the appearance of weakened, damaged nails.

This concentrated basecoat works as the first step in your manicure routine, aiming to protect nails from staining while supporting resilience and smoother surfaces for polish application. The lightweight formula absorbs quickly, leaving a clear, even foundation that prepares nails for longer-lasting color. Free from animal testing and gluten, it fits into a clean-beauty nail regimen.

How does Horse Power protect nails during a manicure?

The basecoat creates a barrier between nail plate and pigment, reducing the chance of staining and shielding nails from harsh polish chemicals. It also helps smooth ridges and provides an even surface so top coats and color adhere more reliably.

• Clear primer layer prevents color transfer and dulling
• Improves adhesion for fewer chips and longer wear
• Minimizes visible ridges for a smoother polish finish

What ingredients support nail strength and how do they help?

Key actives include horsetail extract, biotin, B vitamins and calcium, chosen to support structural integrity and surface quality of the nail. These components are commonly used in nail care to help fortify nails and improve the look of fragile or splitting edges when used consistently.

• Horsetail extract: provides mineral-rich plant support for nail texture
• Biotin: a vitamin-associated component for fortification
• Vitamin B and calcium: help replenish and help resist breakage

How should I use this basecoat to get the best results?

Start with clean, dry nails. Apply a single, even coat and allow it to dry completely before layering color or other treatments. Regular use as part of your manicure can build a more resilient nail surface over time.

• Wipe nails clean and ensure no oils remain before application
• One thin coat is sufficient; let it fully dry before polishing
• Use between polishes as a prep and protective layer for ongoing care

Will this basecoat fit my clean-beauty routine?

Yes—Horse Power aligns with butter LONDON’s clean-beauty ethos. The formula is cruelty-free and gluten-free, made without several common toxins, and designed to deliver salon-quality performance without unnecessary additives.

• Cruelty-free: not tested on animals
• Gluten-free: suitable for those avoiding gluten in topical products
• Part of a feel-good nail collection focusing on safer ingredients

Who is this for: butter LONDON Horse Power Basecoat is intended for anyone wanting a stronger foundation for their manicure—especially those with brittle, peeling, or easily stained nails who prefer clean, cruelty-free products. It’s suitable for frequent polish wearers looking to protect nails and for users seeking a straightforward strengthening step in their at-home nail care routine.

Ingredients

Ethyl Acetate, Butyl Acetate, Alcohol Denat., Nitrocellulose, Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer, Isopropyl Alcohol, Trimethylpentanediyl Dibenzoate, Acetyl Tributyl Citrate, Sucrose Acetate Isobutyrate, Etocrylene, Retinyl Palmitate, Tocopheryl Acetate, Dimethicone, Biotin, Calcium Pantothenate, Glycerin, Equisetum Hiemale Extract, Glycidoxypropyl Trimethoxysilane, Methacryloyl Propyltrimethoxysilane, Methyltriethoxysilane, Mercaptopropyltrimethoxysilane, Ascorbic Acid, CI 60725 (Violet 2).