Improves Performance. Prolongs appliance life. Biodegradable. Features: Household favourite for over 70 years Biodegradable formula Strongest appliance descaler on the market Specifications: Weight: 1.2 kg Model Number: MEGAK. The Kilrock Mega-K descaler is the perfect multi-purpose solution to prolong the life and improve the performance of your home appliances. Its powerful, biodegradable formula will efficiently clean irons, showerheads, toilet bowls. coffee machines, kettles and more.