Blue Skin Keraline Brazilian Keratin Treatment Kit. A ready-to-use kit to repair and straighten hair in 2 easy steps – and it lasts for 4 months! The KERALINE Brazilian Keratin Treatment kit is the first hair CARE TREATMENT that coats and straightens the hair while nourishing and protecting it using natural keratin. Once strengthened, hair becomes softer, silkier and smoother. Hair structure remains intact. THE EFFECT IS NATURAL. Made with top-quality keratin and pequi oil, KERALINEs formula is formaldehyde, paraben and colour-free.