The SCOTCH-35-GY part of 3M is a 3-inch x 35-yard gray duct tape made by 3M that offers excellent conformability and adhesion. It is designed to withstand a wide range of temperatures and extreme weather conditions, making it ideal for both indoor and outdoor use. SCOTCH-35-GY has a high tensile strength and is resistant to abrasion, water, chemical, and UV exposure. Its aggressive, high-tack adhesive backing sticks to many surfaces, including metal, plastic, painted surfaces, and more. It is a versatile, multi-purpose duct tape that is great for repairs and construction projects, certain industrial applications, and a variety of other uses.