4" Heptagon Shape MDF (4mm)

The 4-inch Heptagon MDF Shape (4mm) is a precision-cut, seven-sided craft blank made from smooth medium-density fibreboard — ideal for resin pouring, decoupage, painting, and mixed-media projects. The flat, even surface accepts resin, acrylic paint, chalk paint, and mod podge without warping, making it a reliable base for both beginners and experienced crafters.

At 4mm thickness, this MDF blank is sturdy enough to hold a full resin pour while staying lightweight for wall hangings, keychains, or tabletop décor. The heptagon silhouette adds a geometric, contemporary look to any finished piece — a refreshing alternative to standard circles and squares.

• Precision laser-cut edges — clean, splinter-free sides that need minimal sanding before use
• Smooth MDF surface — ready to prime, paint, or pour resin directly without heavy prep work
• 4mm thickness — firm enough for resin pours yet light enough for wall art and hanging décor
• Versatile craft base — suitable for epoxy resin, UV resin, acrylic paint, decoupage, and pyrography
• Geometric heptagon shape — seven-sided silhouette for modern, eye-catching finished pieces
• Consistent sizing — 4-inch diameter ensures uniform results when making sets or batch orders
• Small-business friendly — order in bulk for consistent, professional-looking product lines

How to Use

Sand lightly with 220-grit sandpaper if needed, then wipe clean with a dry cloth. Apply a sealer or gesso coat before resin pouring to prevent air bubbles from the MDF. For decoupage or painting, you can work directly on the surface. Drill a small hole at the top edge before finishing if you plan to use it as a wall hanging or keychain.

Safety Tips

When sanding MDF, wear a dust mask as fine MDF particles can irritate the respiratory tract. If using epoxy or UV resin on this blank, work in a well-ventilated area and wear nitrile gloves. Keep resin and solvents away from children.