First of all, oil are created equal -- There are so many different types of oils.
Rose hip being a natural plant base extract and measured to the micron will actually not harm at all eyelash extensions.
It would be like saying tea tree oil is bad for extensions because it’s an oil. Tea tree oil is actually found in many lash cleansers. And just like rose hip oil will not alter nor deteriorate cyanoacrylate.
On the other hand, mineral oil for instance which is petroleum based, would not be advisable at for lash extensions. Hope that helps!
Additionally Rose Hip oil is not only full of antioxidants but offer several anti-aging properties, including the ability to keep skin moisturized which is so important when cleansing your face and the delicate eye area.