High Density Overlay (HDO) form panel is a plywood sheet faced on both sides with a thermosetting resin-impregnated fiber overlay bonded to the veneer under heat and pressure. The overlay gives the panel a hard, nearly non-porous surface that releases cleanly from cured concrete and leaves a smooth as-cast finish with little or no patching.

Panels of this type are built with exterior-grade adhesive and are intended for repeated use in wall, column and slab formwork. The dense face resists the abrasion of pouring and vibrating, resists absorption of water from the mix, and can be cleaned and re-oiled between pours, so a single panel typically serves many cycles before the overlay is worn through.

HDO is the higher-grade choice among overlaid form panels, used where the concrete will be left exposed and the form marks will be seen. Cut edges should be sealed with an edge sealer to keep moisture out of the core.

Key Features

• Resin-impregnated high density overlay bonded to both faces
• Hard, low-porosity surface releases cleanly and produces a smooth as-cast concrete finish
• Exterior-type adhesive bond for wet-use formwork service
• Designed for multiple pours; faces can be cleaned and re-oiled between uses
• Standard 4 ft. x 8 ft. panel format for framing on conventional form studs and walers
• 3/4 in. thickness for greater stiffness and reduced deflection between supports
• Cuts and drills with standard carbide-tipped woodworking tools; cut edges take an edge sealer

Applications

• Architectural concrete wall and column forms where the finish is left exposed
• Foundation and retaining wall formwork
• Slab edge forms, curbs and pier caps
• Bridge, parapet and other civil concrete forming
• Reusable gang forms and job-built form panels
• Precast concrete molds and casting beds

Product Details

• Product Type: HDO concrete form plywood panel
• Overlay: High Density Overlay (HDO), both faces
• Material: Veneer plywood core with resin-impregnated fiber overlay
• Nominal Thickness: 3/4 in.
• Panel Size: 4 ft. x 8 ft.
• Bond Type: Exterior
• Intended Use: Reusable concrete formwork
• Sold As: Each panel

Specifications

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