Weft Sealant allows longer lifespan of our virgin hair. Sealing the weft prevents shedding: Apply a thin coat of sealer to the track of hair along the thread/track. Allow product to dry, coat both sides of weft. Apply a second coat of sealant. Product dries quickly and cures immediately upon drying. DO NOT use this product to bond wefts/tracks to natural hair. Water Resistant. Acetone resistance may vary per user.