If by waterproof you mean water-repellent, then yes.
Keratin.
Keratinocytes
Integumentary system (skin)
Carbohydrates
No. The skin's function is to provide a barrier to the outside world. As such it's pretty waterproof.
keratinized stratified squamous
Nails are made of up the protein called keratin, which is a tough and insoluble structual protein. It is basically dead skin cells.
Keratin is the protein that strengthens and waterproofs the epidermal layer of the skin.
Keratin
keratin
Collagen
Keratin
The protein that helps to make the skin of a vertebrate tougher and more waterproof is called keratin. Keratin is also the primary structural component of nails and hair.
Keratin is the protein in the epidermis that helps protect the skin and underlying tissue. Keratin is strong and waterproof.
keratin
Keratin.
which is a protein that makes the skin waterproof
Keratin is the waterproof protein predominant in the stratum corneum.