I put this bond-repair haircare duo to the test after the monsoon disrupted my naturally straight texture

My hair has never been particularly interested in reinvention. It is naturally straight, smooth and fairly flat, with strands that sit somewhere between fine and medium. Most days, it requires little more than a wash, a brush and a reasonable level of cooperation from the weather. Then the Mumbai monsoon arrived and my hair began behaving like Monica Geller’s in Barbados.

There were waves where there had never previously been waves, frizz gathering around the lengths and ends that felt strangely dry despite the air outside containing enough moisture to qualify as soup. My hair did not necessarily look damaged, but it no longer felt like mine.

Humidity cannot permanently alter the texture created by the shape of your hair follicles, but it can temporarily change how individual strands behave. Hair absorbs moisture from the atmosphere, causing the fibre to swell and lose some of its smooth alignment. When the hair is porous or already weakened, that moisture is absorbed unevenly, which can translate into frizz, bends and a texture that appears very different from its usual state. This was the condition in which I tried two products from Redken’s Acidic Bonding Concentrate range: the 24/7 Night & Day Serum and the Hair Bandage Balm.

The serum is designed as an all-over leave-in treatment for the mid-lengths and ends, while the balm is more specifically intended for dry, visibly damaged ends. Both sit within the growing bond-repair haircare category, which can be slightly misleading if interpreted too literally. Hair beyond the scalp is a dead fibre and cannot heal itself like skin. What a well-formulated treatment can do is reinforce weakened areas, condition the surface, reduce friction and make damaged hair feel smoother and less susceptible to breakage.

I began with the Hair Bandage Balm, expecting something thick, waxy and medicinal from a product with “bandage” in its name. Instead, it was almost imperceptibly lightweight. Once applied, I could barely tell there was anything in my hair.

That absence of weight mattered. Repair products can easily overwhelm naturally straight, finer hair, replacing frizz with limpness and leaving the ends arranged into greasy sections. This one did neither. Applied to my frizzy, newly waved-out monsoon hair when damp, it made the lengths and ends feel softer without flattening them further or leaving behind a noticeable coating. Split ends cannot be permanently fused back into untouched strands; eventually, scissors remain the only definitive solution. A balm can, however, temporarily bring separated fibres together, smooth their appearance and reduce the friction that makes damaged ends look increasingly unruly. I later used the balm again on dry hair, when the ends needed some nourishment, but not an entire wash-day. It worked surprisingly well as a quick rescue, softening the roughness and making the hair look more polished.

The 24/7 Night & Day Serum required a little more technique. Its formula felt nourishing rather than weightless and on my texture, that meant it worked best on freshly washed hair. I found that it needed to be rubbed thoroughly between the palms before being distributed carefully through the mid-lengths and ends. Applied this way, it spread evenly, absorbed better and prevented the hair from drying into its now-customary nest of frizz.

The real test came after another wash, when the weather had pushed my hair towards peak Monica-in-Barbados territory. This time, I layered the two products: the serum through the wet mid-lengths and ends, followed by a small amount of balm concentrated on the driest areas.

Layering two leave-ins on straight, fine-to-medium hair is usually the point at which optimism proves to be foolish. Instead, the combination returned most of my naturally straight texture. The hair looked smoother, felt softer and, crucially, more like itself rather than ironed into submission or shellacked with silicone.