Barrier Super Plus Fly Repellent Gel 500ml. Barrier Super Plus Fly Repellent is a super strength, 100% natural formula that defies all blood-sucking and nuisance flies including midges, bots, horseflies, house, stable and black flies. Super Plus helps to soothe and calm the irritation caused by midge bites and stops the need to rub. Barrier Super Plus contains pure avocado, which is known to be high in vitamins A, D and E, to deep condition and nourish the skin. The Super Plus Gel is ideal for those awkward areas like the head and belly. Read more… Can be used in conjunction with the spray. Free from all prohibited substances under current FEI and HRA rules. HSE licence no: 8725. Contains: Citriodiol1. 5% w/w, Citral.