Hair serums with the weight printed on the bottleFree shipping over $45All prices in USD
Northline

Bond Repair Serum

For hair that has been bleached, coloured or over-heated

Weight 1 of 5 · Light

Daily, or on every wash day

A pea-sized amount disappears into most hair. This is the band fine and thin hair should live in, and the only band we would put anywhere near the root.

Suits fine / thin, medium, thick / coarse, curly / coily hair at this frequency. Find your ceiling.

$36.00

USD
1

Standard shipping $4.95, free over $45. Arrives in 3–5 business days. 45-day returns.

A leave-in bond serum on a maleic acid and amino complex, for hair that has been chemically lightened, coloured or worked hard with heat. It improves how damaged hair looks and behaves — less snapping under a comb, less split-looking ends, better hold on a style.

Almost all of the formula is water and humectant, so despite doing the most structural work in the catalog it sits at weight 1. That is the useful part: damaged hair is often fine hair, and most repair products are far too heavy for the hair that needs them.

Weight 1. Every day if you want it, on damp hair, from the ears down.

The ingredient record

Everything in this formula, stated plainly, and the reasoning behind the number on the bottle. The same record is printed on the insert in the box.

Weight
1 of 5 — Light
Frequency
Daily, or on every wash day
Ingredients (INCI)
Aqua (Water), Propanediol, Maleic Acid, Sodium Hydroxide, Glycerin, Hydrolyzed Wheat Protein, Arginine, Panthenol, Hydroxypropyl Guar, Sodium PCA, Citric Acid, Sodium Benzoate, Potassium Sorbate.
Size
50 ml / 1.7 fl oz — pump bottle
Net weight
53 g
Texture
Thin milky fluid. Absorbs completely, no film.
Made
Formulated and filled in the United States.

How to use

  • Three to four pumps onto towel-dried hair.
  • Comb through so it is evenly distributed — patchy application gives patchy results.
  • Leave in. Style as usual. Do not rinse.
  • On bleached hair, use it on every wash day for the first month.

Cautions

  • Contains hydrolysed wheat protein. Avoid if you have a wheat allergy, and step back to every other wash if your hair starts to feel stiff or straw-like — that is protein overload and the fix is less, not more.
  • This improves how damaged hair looks, feels and behaves. It does not undo damage; nothing sold over a counter does.
  • Not for use in the 48 hours after a chemical service unless your colourist says otherwise.

Shipping

$4.95 standard, free over $45. 3–5 business days. Full policy

45 DAYS

Returns

Unopened and in original packaging, or opened if it caused a reaction. Refunded within 5 business days of reaching us. Full policy

Questions about this product

hello@northlinehair.comEvery message answered within one business day.

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