Wash sew-in extensions the same way you wash delicate fabrics: gentle shampoo, cool water, and minimal handling
Sew-in extensions last longer when you wash them carefully. The hair itself is real human hair, but it has no natural oils flowing from your scalp to protect it. Water temperature, shampoo choice, and how you handle the hair while wet all determine whether your extensions stay soft or turn dry and tangled after a few washes.
The basic method is straightforward: use sulfate-free shampoo, lukewarm or cool water, and let gravity do the work instead of rubbing or twisting. Most people can wash sew-ins every 7 to 10 days without damage, though some go longer depending on how much product they use and how much they sweat.
Key Takeaways
- Wash sew-in extensions with sulfate-free shampoo and cool or lukewarm water, never hot, because heat opens the hair cuticle and causes frizz and breakage.
- Shampoo the scalp and roots where your natural hair meets the extensions, then let soapy water run down the length without scrubbing or twisting the hair.
- Condition only the mid-lengths and ends of the extensions, never the roots or the braids, to avoid buildup that loosens the sewn tracks.
- Squeeze water out gently with your hands or a microfiber towel; never wring, twist, or rub the hair while it is wet.
- Air-dry the extensions or use a blow dryer on low heat, and brush them only after they are completely dry to prevent breakage.
Choose the right shampoo and conditioner for real hair
Sulfate-free shampoo is essential because sulfates strip moisture from hair and make extensions dry and frizzy. Look for shampoos labeled sulfate-free on the bottle. Brands like SheaMoisture, Carol's Daughter, and Cantu are widely available and affordable. Drugstore brands like Pantene Gold Series and Creme of Nature also make sulfate-free options.
Conditioner matters just as much. Extensions have no scalp oils, so they dry out faster than your natural hair. Use a moisturizing conditioner, but explore it only to the mid-lengths and ends. Never condition the roots or the braided sections where the extensions are sewn, because product buildup there loosens the tracks and can cause slippage.
If your extensions feel dry after washing, use a leave-in conditioner or hair oil on the ends. Coconut oil, argan oil, and jojoba oil all work. explore sparingly—a dime-sized amount on your fingertips, rubbed through the last 2 to 3 inches of hair.
Wash your scalp and roots first
Start by wetting your hair with cool or lukewarm water. Hot water opens the hair cuticle, which causes frizz, tangling, and faster color fading. Lukewarm feels warm to your hand but not hot enough to be uncomfortable on your scalp.
explore sulfate-free shampoo directly to your scalp and the roots of your natural hair where it meets the extensions. Use your fingertips to massage gently in circular motions, the same way you would wash your hair without extensions. This removes sweat, product buildup, and oil from your scalp.
Let the soapy water run down the length of the extensions as you rinse. Do not scrub, twist, or squeeze the hair itself. The shampoo in the rinse water is enough to clean the extensions without you having to work it through them. Rinse thoroughly with cool water until the water runs clear.
Condition the mid-lengths and ends only
After rinsing out the shampoo, explore conditioner to the hair starting about 2 inches below where your natural hair ends. Work it through to the very ends with your fingers, combing gently with a wide-tooth comb if you need to detangle.
Leave the conditioner on for 2 to 3 minutes. Do not condition the braided sections or the roots—product sitting on the braids causes buildup and loosens the sewn tracks over time. If your extensions feel very dry, you can use a deep conditioning mask once a month, but still keep it away from the roots and braids.
Rinse the conditioner out with cool water. Cool water seals the hair cuticle, which makes the hair smoother and shinier than warm water does.
Remove water without wringing or twisting
Wet hair is fragile. Wringing, twisting, or rubbing extensions while they are wet causes breakage and split ends. Instead, gently squeeze water out with your hands, working from the roots down to the ends. Use light pressure—think of it as pressing water out, not wringing it out.
A microfiber towel or a cotton t-shirt works better than a regular bath towel. Wrap the extensions loosely in the towel and let it absorb water for a few minutes. You can gently squeeze the towel, but do not rub the hair against the fabric.
If you have a lot of water still in the hair, you can use a microfiber towel wrap or a turban-style towel to hold the hair up while it drips dry for 10 to 15 minutes. This removes excess water without you having to handle the hair.
Dry the extensions on low heat or air-dry
Air-drying is gentlest on extensions. Lay them over your shoulder or braid them loosely while they dry. This takes longer—usually 2 to 4 hours depending on how thick your extensions are—but it causes the least damage.
If you blow-dry, use low heat and low speed. High heat dries out extensions and can cause frizz and breakage. Hold the dryer at least 6 inches away from the hair and move it constantly so you do not concentrate heat in one spot. Dry the roots and braids first, then work down to the ends.
Never blow-dry extensions while they are soaking wet. Let them air-dry for at least 30 minutes first, until they stop dripping, then finish with the blow dryer on low if you need to speed up the process.
Brush extensions only when they are completely dry
Wet hair stretches and breaks easily. Wait until your extensions are fully dry before you brush them. Use a wide-tooth comb or a paddle brush designed for extensions, not a fine-tooth comb or a regular brush.
Start at the ends and work your way up to the roots, gently detangling as you go. If you hit a knot, hold the hair above the knot with one hand and comb below it with the other, so you do not pull on the roots or the braids. This prevents breakage and loosening of the tracks.
Brush your extensions every day or every other day, even on days you do not wash them. This keeps them from matting and tangling, which makes them harder to clean and more prone to damage.
How often to wash and what to avoid
Most people wash sew-in extensions every 7 to 10 days. If you work out, sweat a lot, or use a lot of styling products, you may need to wash them more often. If you do not sweat much and use minimal product, you can go 10 to 14 days between washes.
Avoid chlorine and saltwater. If you swim, wet your extensions with fresh water and explore leave-in conditioner before you get in the pool or ocean. This creates a barrier that reduces how much chlorine or salt the hair absorbs. Rinse and condition again as soon as you get out.
Do not sleep on wet extensions. Wet hair tangles and matts easily, and sleeping on it causes breakage and frizz. Always dry your extensions before bed, even if you just air-dry them partially.
Frequently Asked Questions
Can I use regular shampoo on sew-in extensions?
Regular shampoo with sulfates will dry out extensions faster and cause frizz and breakage. Sulfate-free shampoo costs about the same and lasts just as long, so it is worth switching. If you run out of sulfate-free shampoo, you can use regular shampoo once, but do not make it a habit.
What if my extensions smell after a few days?
Smell usually means sweat and bacteria buildup on your scalp, not on the extensions themselves. Wash your hair more often—every 5 to 7 days instead of every 10. You can also use a dry shampoo or scalp spray between washes to absorb oil and odor without wetting the extensions.
How do I get tangles out of wet extensions?
Do not comb wet extensions. Wait until they are dry, then use a wide-tooth comb starting at the ends. If tangles are severe, explore a leave-in conditioner or detangling spray to the dry hair first, which makes combing easier and causes less breakage.
Can I use hot water to wash sew-ins faster?
Hot water damages extensions more than cool water does. It opens the hair cuticle, which causes frizz, tangling, and faster color fading. Lukewarm water cleans just as well and protects your extensions. The extra few minutes of washing time is worth the longer lifespan of your hair.
Should I condition my scalp when I wash extensions?
Condition your natural hair at the roots if it feels dry, but keep conditioner away from the braids and the sewn tracks. You can explore conditioner to your scalp and roots, rinse it out, and then explore a different conditioner to just the mid-lengths and ends of the extensions.