OLAPLEX Nº.7 Bonding Oil - 450°F Heat Protection

OLAPLEX Nº.7 Bonding Oil is a 1 fl oz styling oil with a lightweight formula, shine-focused finish, and heat protection rated up to 450°F. The bottle uses a metered-drop design that releases a small amount when the base is tapped, keeping the concentrated oil controlled during application.

Size Formula and Finish

The full-size bottle contains 1 oz or 30 mL and is listed at $32.00 as of 09/23/2026. The formula includes dimethicone, isohexadecane, coco-caprylate, phenyl trimethicone, sunflower seed oil, tocopherol, and bis-aminopropyl diglycol dimaleate.

OLAPLEX describes the product as a concentrated, lightweight oil for damp hair before styling. Its stated hair-care functions include increasing shine and color vibrancy, smoothing frizz and flyaways, and adding softness on wet, damp, or dry hair.

Heat Styling and Application

The product is rated for heat protection up to 450°F or 232°C. That figure places it in the styling-oil category rather than a simple finishing oil, although the rating does not replace the temperature controls or directions for a particular heat tool.

Ulta's listed directions call for 2-3 drops on damp or dry hair, followed by styling as desired. The retailer also identifies the oil's coconut-derived emollient, vitamin E, and sunflower seed oil as key ingredients, while the complete ingredient list places silicones near the beginning of the formula.

Place in Premium Hair Care

At $32.00 for 1 fl oz, Nº.7 sits above basic drugstore hair oils and alongside prestige styling treatments sold through specialty beauty retailers. Its defined heat-protection rating and bond-building ingredient give the formula a more specific role than an oil marketed only for shine.

Henkel completed its acquisition of OLAPLEX on 07/07/2026, and the brand continues under the OLAPLEX name. For users who want one leave-in product for shine, frizz control, and heat styling, the 1 fl oz bottle offers a compact format; people seeking a silicone-free formula should look elsewhere because dimethicone and other silicones appear in the ingredient list.

Verdict for Styling Routines

OLAPLEX Nº.7 Bonding Oil is best placed as a concentrated finishing and pre-styling oil for dry, damp, or wet hair. The 450°F rating, 1 fl oz size, metered dispenser, and $32 price define its position; the silicone-based formula is the main consideration for shoppers who prefer lighter botanical or silicone-free products.