I found several search results that provide information on lash products, including their ingredients, positive and negative aspects. Here are the details:

Eyelash extension glue ingredients | Whats in my lash glue? - BL Lashes

• Cyanoacrylate is a major component of all professional eyelash extension glue and is the base material for all fast-curing glue. It ensures the adhesive dries in a matter of seconds and holds the lashes firmly in place for several weeks.
• Hydroquinone helps prevent the glue from hardening in the glue bottle and stops the glue from hardening before you actually start using it.
• Carbon Black is used to make the deep dark color of the glue.

Lash Lift Kit, Eyelash Perm Kit, Professional Eyelash Lash Extensions, Lash Curling, Semi-Permanent Curling Perming Wave Suitable For Salon - Amazon.com

• Customers have negative opinions about the moisture of the product. They mention that the glue is not sticky enough, it dissolves when it gets wet, and the lift doesnt last long.
• The kit includes a lash perm solution, a fixing agent, a nutrition agent, a cleanser, and a lash glue.

Choosing The Right Lash Extension Cleanser | lashx.pro

• Look for ingredients that will actually improve lash health like Aloe, biotin, panthenol, silk extract, cucumber or humectants, and other non-irritating antioxidants.
• Avoid products containing propylene glycol, sulfates like Sodium Laurel or Laureth Sulfate, and surfactants.
• Avoid products that are not specifically made for eyes and lashes.

How a false eyelash boom aided North Korea - Vox

• False eyelash kits typically contain synthetic or animal-origin fibers meant to resemble eyelashes, which are attached to two strips that can be applied to the natural lash line with some of the included glue.
• Many Chinese manufacturing firms that advertise on Alibaba mention that their lash fibers are North Korean mink right in the product title.

Top Three Ingredients for Lash Extension Clients to Avoid | Timeless Aesthetics

• Avoid products containing oil, mineral-based oils, vegetable oil, and coconut oil, as they break down the adhesive used to bond the extensions to your own natural fringe.
• Avoid products containing formaldehydes, cyanoacrylates, and latex, as they can cause irritation and allergic reactions.

Lashify Review 2023: DIY Lash Extension Pros, Cons & Photos - Good Housekeeping

• Lashifys formulas are ophthalmologist-tested, hypoallergenic, and free of irritants, such as formaldehydes, cyanoacrylates, and latex.
• The Gossamers are made of pure Korean PBT silk, which is lightweight and feathery, so they don’t put stress on your natural lashes.
• The Gossamers are applied with a flexible bond (a.k.a. Whisper Light), which cushions and allows them to follow the natural movement of your lashes.

In summary, lash products can contain various ingredients, some of which can be harmful or cause allergic reactions. It is important to check the ingredients list before purchasing a product and avoid those that contain irritants or oils that can break down the adhesive used to bond the extensions to your natural lashes. Some products are ophthalmologist-tested, hypoallergenic, and free of irritants, making them a safer option.