Hexigel is an antiseptic mouth gel used to manage gingivitis (gum disease), oral candidiasis (oral thrush), and aphthous/other oral ulcers. It also helps to maintain oral hygiene. HEXIGEL MOUTH GEL 15 GM is a powerful antiseptic solution designed to eliminate harmful microbes and prevent infections. This gel is formulated to provide targeted relief and promote oral hygiene. Hexigel mouth gel is used to treat oral or dental problems such as oral fungal infections, inflammation in the gums, and mouth ulcers. It contains chlorhexidine as the active substance. Hexigel Mouth Gel is an antiseptic oral gel that is used for the treatment of mouth ulcers. It is also used on the tooth surfaces to prevent dental plaque (a thin film of bacteria that grows on your teeth) and gingivitis (swelling and redness of gums).