Under Armer is our breakthrough anti-corrosion formula, and is the result of 5 years of intensive development to find a safe and effective underbody protection spray, free of harsh solvents and sticky lanolin or oils, for an easy way to protect the underside of your 4WD, boat, caravan, trailer etc. Modern anti-rust ingredients create a corrosion shield that doesn't wash off and lasts 2-3 months in tough conditions for extended adventures. It's a simple spray on, rinse off application that cures to a clear, non-sticky new look finish and is suitable for all underbody metals, rubbers and plastics. The unique water based formula means you don't get covered in toxic solvents as you're spraying, which is critical when in an enclosed space underneath your 4WD.

• Modern anti-rust additives create a durable corrosion barrier that doesn't wash off.
• Easy application - spray on and rinse off for super hydrophobic protection that won’t attract dirt, dust, or sand.
• Prevents corrosive salt and sand from bonding to your cars underbody, perfect for extended beach trips.
• Repels mud and grime for easier cleaning after a dirty weekend.
• Fast curing formula gets you back out there faster than the rest. 
• Up to 2-3 months of genuine durability in our real world testing.
• One bottle is enough to treat a larger SUV or ute.
• Market leading water-based formula which is safe on metals, rubber, plastic and all underbody components.
• Solvent free for safer and easier spraying in confined spaces under your vehicle.
• Best used after a deep clean with our Down & Dirty and the Little Stiffy brush for the best results.
• Proudly Aussie made and developed formula that’s biodegradable because it's good for Australia.
• Available exclusively at Supercheap Auto.
• Product code: BOUNDER