●The gel for nails contains no acidic ingredients. 5-Free formula. NO - Formaldehyde, NO - Toluene, NO - DBT, NO - Parabens, NO - Butanone ●The builder gel must be dried under a lamp. Polymerization time (depending on the thickness of the layer and lamp power): UV lamp - 2 min. In the hybrid/LED lamp - 60 - 90s. ●If the product was frozen during delivery and has become thick, you can heat it to 50 °C. In this case, the product does not change its technical parameters.