Generally speaking, yes, depending on the method used to install them. Washing dreadlocks can help them lock up under specific circumstances with the right shampoo. The cleaner and dryer your dreadlocks are the faster they will lock up. In contrast, the dirtier and more oily your dreadlocks are the less effectively knots will form in your hair. If you’re looking for a safe and healthy shampoo please visit our shampoo guide here.