What is a primary effect of using oil-based products on hair extensions?

Using oil-based products on hair extensions frequently results in buildup and a greasy appearance. Hair extensions, particularly those made from synthetic materials or human hair that hasn't been properly cared for, can absorb excess oil from these products. This buildup can create a heavy, weighed-down look that detracts from the natural shine and movement of the extensions.

Moreover, because oil-based products can be difficult to fully wash out, they can lead to a residue that not only appears unappealing but might also cause the extensions to become less manageable over time. Proper care for hair extensions typically recommends lighter, water-based products that promote a healthy appearance without the risks associated with oils, making it essential to understand the implications of using oil-based products on them.