SS ThruWall Stainless Steel Inside Corner

PROSOCO SS ThruWall Stainless Steel Inside Corner is a pre-formed 304 stainless steel corner piece that carries through-wall flashing around an internal masonry corner without site-fabricated mitres.

What it does

It creates a continuous, factory-formed flashing transition around inside corners — eliminating the leaks that come from hand-cut, hand-folded fabric corners. Dimensions match PROSOCO's ThruWall flashing system so the joint between corner and run can be sealed reliably.

When and where to use it

• Internal corner transitions in through-wall flashing runs
• Cavity wall and masonry veneer construction
• Coordinated with PROSOCO ThruWall fabric flashing and accessories

Key benefits

• 26 gauge 304 stainless steel, spot-welded and soldered
• 4" H × 6" D × 6" W with 2" notch
• Eliminates field-fabricated mitre details
• Compatible with full PROSOCO ThruWall system
• Sold in 25-piece boxes