Introduction: The Paradox of Sculpture
A sculpture is both heavy and utterly fragile. This paradox is precisely what makes it the natural enemy of conventional transportation.
Whereas a standard “ Carrier ” thinks in terms of pallets and weight, a 2-kg resin sculpture with outstretched arms or an antique bronze with prominent details are subject to physical laws that automated sorting lines completely ignore. Conveyor belts, stacking, 80-cm drops at logistics centers, and vibrations from 500 km of road travel: every stage of the journey poses a threat.
The first thing that comes to mind is packaging. It’s essential. But most shippers make a critical mistake: believing that packaging alone is enough to protect a one-of-a-kind, irreplaceable item—the true value of which will never be recognized by carriers in the event of a loss.
This guide details the structural packing techniques endorsed by professionals in the art and fine art shipping industries, the materials best suited for each type of artwork, and the financial realities that every collector or gallery owner must consider before shipping.
Why Compensation Based on Weight (CMR) Is a Disaster for Art
Before we talk about packaging, let's talk about money. Because that's where the real risk lies.
The CMR Convention, which governs the international carriage of goods by road, sets carriers’ liability at 8.33 SDR per kilogram of goods, or approximately €10 per kg at the current exchange rate (February 2026). For domestic transport, carriers’ general terms and conditions generally align with these same Limits.
Here's what that means in practice:
Carrier which breaks your €8,000 sculpture, will reimburse you €46 without insurance: It's legal; it's the reality.
The only effective protection isad valorem insurance: coverage based on the actual declared value of the artwork, rather than its weight. At Claisy, this coverage is offered at 0.60% Excluding VAT* of the declared value for collectibles and sculptures, with no deductible and compensation paid within 72 hours.
For the €5,000 bronze sculpture mentioned above: €30 Excluding VAT (5,000 × 0.60% Excluding VAT). DHL Art Shipping generally charges 1%, with a minimum fee that is often more than €50. Claisy covers up to €100,000 with no minimum, making it the most suitable solution for medium- and high-value pieces.
Choice of Materials: PE Foam vs. PU Foam
The most common mistake when packing sculptures is using the wrong type of foam. Not all foams are created equal, and your choice directly affects the survival of your artwork.
Polyethylene (PE) Foam: The Museum Standard
Polyethylene foam is the standard material used by museums and art handlers. Its properties make it indispensable for transporting collections:
- Recommended density: at least 35 kg/m³ for optimal protection against moderate impacts; 45–50 kg/m³ for heavy or very high-value items
- Chemical resistance: pH-neutral; does not migrate; does not transfer any compounds to painted or weathered surfaces
- Mechanical memory: absorbs repeated impacts without becoming permanently compressed
- Cutting options: Can be easily machined to create cavities that precisely match the shape of the sculpture
Polyurethane (PU) Foam: Avoid Using It for Valuable Items
PU foam (standard packaging foam, furniture foam) is unsuitable for transporting art for several reasons:
- Acidity: releases chemical compounds that can damage patinas, finishes, and pigments over time
- Permanent compression: After an impact, it does not return to its original shape, reducing protection during subsequent impacts
- Insufficient density: Most standard PU foams have a density of 15–20 kg/m³, which is far from sufficient to cushion impacts on fragile parts
Exception: "Memory foam" (viscoelastic) PU foam has interesting intermediate properties that make it well-suited for objects with complex shapes. It conforms perfectly to contours and effectively absorbs continuous vibrations when combined with an outer layer of PE foam.
Other Supplementary Materials
- pH-neutral tissue paper (glassine): for direct contact with sensitive surfaces (paintings, gilded bronzes, lacquerware)
- Aluminum corner guards: for protecting the protruding corners of a body or frame
- Polyethylene film: a moisture-proof barrier, essential for exports or long-distance transport
The Double-Box and Wooden Crate Method
The Double-Box: The Minimum Standard for Any Sculpture
The double-box method is the technique recommended by ICOM (International Council of Museums) standards for transporting museum objects. It involves creating two distinct and independent layers of protection:
- Inner box: Custom-made packaging made of PE foam cut to the exact shape of the sculpture, ensuring a millimeter-precise fit without applying pressure to fragile parts. The piece must be held securely in place with no play, yet without being subjected to any stress.
- Outer box: Reinforced double-wall corrugated cardboard (or wooden crate) that is at least 10 cm larger on each side than the inner box. The space between the two boxes is filled with additional cushioning material (PE foam in sheets or rolls).
- Physical principle: In the event of an external impact, the outer shell absorbs and disperses the initial impact energy. The inner shell, which floats within its mounting, transmits only a residual fraction of the energy to the tread pattern.
Wooden Crates: Essential for Heavy Items and Export
For any item weighing more than 10 kg, valued at more than €5,000, or intended for export, a wooden crate is a better choice than a cardboard box:
- Mechanical strength: A 10-mm plywood crate can withstand stresses that no cardboard box can absorb
- Crush protection: Stacks of pallets and loads placed on top of them have no effect
- Visual cue: A wooden crate immediately signals to the Carrier that the goods are exceptional
A critical requirement for exports: the ISPM 15 standard. Any wooden crate intended to cross a customs border must be made of wood that has been heat- or chemically-treated in accordance with this international phytosanitary standard. Failure to comply results in seizure by customs and may subject the shipper to penalties. Verify that your crate manufacturer certifies compliance with ISPM 15 and affixes the official mark to each panel.
Real-Life Example: Shipping a Bronze Statue Worth €5,000
Scenario: A Parisian gallery ships a 4-kg contemporary bronze sculpture to a collector in Lyon vi Carrier Express
Materials needed:
- Glassine paper: 2 m²
- PE foam, 35 kg/m³: 0.01 m³
- Double-wall cardboard (double flute): 1 set
- 75 mm reinforced tape: 1 roll
- Polyethylene film: 2 m²
Estimated packaging cost: €15 to €25, depending on the quality of the materials
DHL Insurance: approximately 1%, with a minimum premium—that is, a minimum of €50 for a declared value of €5,000—and a claims settlement period of 60 to 90 days, with numerous exclusions for works of art.
Claisy : €5,000 × 0.60% = €30 Excluding VAT. Effective coverage, compensation within 48–72 business hours, Limit up to €100,000.
Direct savings: €20 compared to DHL on this single shipment alone, with incomparably better coverage and faster delivery times. Over 50 shipments per year, the savings exceed €1,000 while maintaining a professional level of protection.