Check the listing for details. 3 PACK!! Fluid Film Black AS11B Undercoating Protection Rust Inhibitor Spray Can. Condition: New. Listed at 44.99 USD. The 3 PACK Fluid Film Black AS11B Undercoating Protection Rust Inhibitor Spray is a high-quality automotive product manufactured in the United States by the reputable brand Fluid Film. This rust inhibitor spray is specially designed to protect vehicles from corrosion and rust, ensuring a long-lasting finish. With a convenient 3 pack quantity, this product is perfect for maintaining the exterior of your vehicle and preventing costly repairs due to rust damage.The 3 PACK Fluid Film Black AS11B Undercoating Protection Rust Inhibitor Spray is a high-quality automotive product manufactured in the United States by the reputable brand Fluid Film. This rust inhibitor spray is specially designed to protect vehicles from corrosion and rust, ensuring a long-lasting finish. With a convenient 3 pack quantity, this product is perfect for maintaining the exterior of your vehicle and preventing costly repairs due to rust damage.