Sealers play a vital role in maintaining henna moisture and adhering paste to the skin for a longer time, resulting in a darker and more enduring stain.
If your henna naturally adheres well to the skin, the use of a sealer becomes unnecessary. Adding sugar to your henna will help this, often making sealing unnecessary.
Application of sealers takes place after the henna has dried but before it reaches the point of cracking or peeling off. Sealers can be either sprayed on or applied with a cotton ball. Opting for multiple thin layers is more effective than a single thick layer.
Several methods exist for sealing henna, but here are four popular ones.
Water Sugar Sealer:
This is what I use - see the video below.
Mix sugar into water until fully combined.
Ratios like 1:1, 1:2, 1:3, or 1:4 of sugar to liquid are suitable.
Lemon juice or a combination of water and rose water can be used instead of water, but they do not improve the stain.
Using distilled water will keep mold from growing in the sealer.