Graco 18C688 ProSurface Smoothing Blade, 40 in

Graco 18C688 ProSurface Smoothing Blade — 40 in: Fit, Use & Selection

The Graco 18C688 is a 40-inch ProSurface smoothing blade engineered for fast, glass-like drywall and plaster finishes with minimal sanding. Its INOX stainless, Bi-Flex blade holds more compound on the surface, wears evenly for consistent passes, and the rounded edge profile helps prevent lines and buildup so you spend less time reworking.

Where it’s used

• High-productivity skim coating and wipe-downs after taping
• Feathering seams and butt joints across wide, open spans
• Large residential rooms, remodels, and commercial interiors requiring a paint-ready finish

What it fits

Built for the ProSurface system: mounts to the ProSurface handle and pairs with extendable poles for reach—20–40 in (18C678) or 40–80 in (18C679). Use 40 in for maximum coverage; step down to 10/14/18/24 in blades for tighter areas.

Key benefits

• INOX Bi-Flex blade technology for a superior finish and even blade wear
• Rounded edges minimize edge lines and material buildup
• Ergonomic control with handle/pole compatibility for long, low-fatigue passes

How to confirm it’s right

1. Match the part number: 18C688 (40-inch smoothing blade).
2. Select width by task: 40 in for broad walls/ceilings; smaller widths for detail work.
3. Verify compatibility with your ProSurface handle and extension pole setup.

Finishing your toolkit? Pair this blade with smaller sizes from the ProSurface Drywall Tool Kit, then explore complementary categories like graco paint sprayer parts and graco sprayer repair parts. Prefer shopping paint sprayer parts online? Visit SprayersAndParts.com for expert-curated options.