RADIUS BLOCK 1/3 5.25" - Trade Associates

The Trade Associates Dura-Block AF4412 Radius Block is a professional-grade sanding tool engineered for achieving precise and consistent curves on automotive and industrial panels. Featuring a fixed 5.25" radius, this block enables technicians to accurately shape and refine contoured surfaces, maintaining factory-style body lines and effectively minimizing imperfections in filler or primer.

Key Features

• Fixed 5.25" Radius: Machined to a precise 5.25-inch radius, this block ensures uniform curves on body lines, bumper covers, fender flares, and other contoured panels, providing repeatable accuracy.
• Durable Dura-Block Construction: Constructed from high-density closed-cell EVA rubber, the block resists distortion and provides stable backing for consistent wet or dry sanding.
• Prevents Surface Imperfections: The rigid yet conforming nature of the block helps prevent ripples, gouging, and digging into fill material, ensuring a smooth, high-quality finish.
• Lightweight & Ergonomic Design: At just 0.5 lb, its lightweight and control-friendly design reduces hand fatigue during extended use, allowing for precise pressure application on intricate curves and localized repairs.
• Versatile Abrasive Compatibility: Designed to work seamlessly with standard adhesive-backed (PSA) or wrap-around sandpaper, integrating flexibly into any professional body shop workflow.

Applications

• Automotive Body Repair: Ideal for shaping filler and primer on curved vehicle panels, including bumper covers, fender flares, and critical body lines on passenger cars, light trucks, and SUVs.
• Refinishing & Blending: Essential for maintaining consistent curvature when blocking transitions between repaired sections and original surfaces, ensuring a seamless blend.
• Composite & Fiberglass Work: Valuable for marine, powersports, and custom fiberglass applications where a precise and repeatable radius is crucial for structural and aesthetic integrity.
• Custom & Restoration Work: Assists in restoring or creating OEM-style contours on classic and custom builds, ensuring accuracy and repeatability are maintained.

Specifications

• Manufacturer: Trade Associates (Dura-Block)
• Model: AF4412
• Product: Radius Block 1/3 – 5.25"
• Radius: 5.25"
• Weight: 0.5 lb