Skip to product information
1 of 16

Sebastian Professional Penetraitt Overnight Repair Serum | Leave-In Treatment with Hyaluronic Acid & Niacinamide for Dry, Damaged Hair | 3.2 fl oz

Sebastian Professional Penetraitt Overnight Repair Serum | Leave-In Treatment with Hyaluronic Acid & Niacinamide for Dry, Damaged Hair | 3.2 fl oz

Regular price £69.45 GBP
Sale price £69.45 GBP Regular price

Curated for everyday beauty routines

Tracked delivery across the United Kingdom

Secure checkout

  • Amazon
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Product Overview

Sebastian Professional Penetraitt Overnight Repair Serum is a concentrated leave-in treatment designed to restore vitality to dry, damaged hair. Formulated with hyaluronic acid and niacinamide, this serum works while you sleep to replenish moisture, strengthen strands, and improve overall hair health. The lightweight, non-greasy formula absorbs quickly without weighing hair down, leaving it soft, smooth, and manageable by morning.

Key Features and Benefits

  • Hyaluronic Acid: Attracts and retains moisture, helping to hydrate dry hair and reduce brittleness.
  • Niacinamide (Vitamin B3): Strengthens the hair shaft, improves elasticity, and adds shine.
  • Overnight Repair: While you rest, the serum works to repair damage, reduce split ends, and prevent breakage.
  • Lightweight Formula: Non-greasy and fast-absorbing, suitable for all hair types without leaving residue.
  • Convenient Leave-In: No rinse needed, perfect for busy mornings.

How to Use

Apply a small amount to clean, towel-dried hair before bedtime. Focus on mid-lengths and ends, especially if hair is dry or damaged. Comb through to distribute evenly. Do not rinse. Sleep with the serum in for overnight repair. In the morning, style as usual. For best results, use consistently as part of your nightly hair care routine.

Who It Is For

This serum is ideal for anyone with dry, damaged, or chemically treated hair. It is also great for those seeking a simple overnight treatment to improve hair moisture and strength without extra effort. Suitable for all hair types including straight, wavy, curly, and coily textures.

Why Choose This Product

Sebastian Professional is a trusted brand in salon-quality hair care. This serum combines advanced ingredients like hyaluronic acid and niacinamide to deliver visible results. Unlike heavy masks or oils, this lightweight serum won't leave your pillowcase greasy or cause buildup. It's a hassle-free way to wake up to healthier-looking hair every day.

Technical Details

Size: 3.2 fl oz (95 ml). Product weight: 250 grams. Dimensions: 50 x 50 x 28 cm. Color: Transparent. Form: Liquid serum. Packaging: Bottle with pump dispenser for easy application.

Delivery in the United Kingdom

We usually dispatch orders within 3 business days. UK delivery usually takes 3–7 working days after dispatch. If an item is dispatched from an international warehouse, delivery may take 7–21 working days. Tracking is provided after dispatch.

Returns and support

Avelisse offers clear post-purchase support and a 30-day return window where eligible. Please check the store returns policy before sending an item back, because final eligibility can depend on product condition, hygiene exclusions, packaging, proof of purchase and whether the return request is started within the stated return window.

How to choose

Use the product description, available variants, product images and collection filters to compare suitability, finish, shade, size, texture or routine step. For beauty products, always review the ingredient list, directions, warnings and usage information on the product packaging before applying, especially when choosing skincare, haircare or body care for a specific concern.

Ingredients and suitability

Ingredient lists, shade details, materials and suitability notes can change by batch or supplier. Check the product packaging first, compare any allergens or sensitivities before use, patch test where appropriate and stop use if irritation occurs. If you are unsure whether a product is right for you, seek professional advice before applying it.

View full details

Why shop with Avelisse

Why Shop with Avelisse?

Secure Checkout

Checkout is handled securely through Shopify.

Clear Returns Policy

Returns information is written plainly before purchase.

Tracked Delivery Options

Delivery messaging is set up for United Kingdom shoppers.

Dedicated Customer Support

Support routes are available for order and product questions.

Carefully Selected Products

Products are organised for easier beauty discovery.