Oct 8, 2026Buying Guides
ISPM 15 for Hand Tool Imports: Wooden Pallets, Explained Simply
Every solid-wood pallet crossing a border needs an ISPM 15 treatment mark - or the shipment risks hold, treatment or re-export. A plain-language guide for tool importers.
What ISPM 15 covers, and what it does not
ISPM 15 is the international standard for wood packaging material in trade, and it exists for one reason: untreated wood can carry pests across borders. It applies to all solid wood packaging - pallets, crates, packing blocks, dunnage and skids. It does not apply to engineered wood products such as plywood, particleboard, MDF or OSB, to presswood pallets, to plastic pallets, or to wood pieces 6 millimetres or less in thickness. That exemption list is the most useful sentence in this article: a unit built entirely from engineered wood or plastic is outside ISPM 15 - but only when the whole unit is made that way, since a plywood deck on solid-wood blocks still counts as wood packaging.
The approved treatments
Solid wood is accepted only if it has been treated one of the ways listed in the standard: heat treatment (HT), which brings the wood core to 56 degrees Celsius for at least 30 minutes and is the most common and environmentally preferred route; methyl bromide fumigation (MB), run to the doses and temperatures set out in the standard's annex - commonly summarised as 16 hours or more, longer at cooler temperatures - and restricted in several markets; dielectric heating (DH), holding a 60-degree core temperature for one continuous minute; and sulfuryl fluoride fumigation (SF), added to the standard in 2018 but not yet accepted by every market. If you are specifying treatment with a Chinese supplier today, HT is the default answer and the one that travels everywhere.
Reading an IPPC stamp
A treated pallet must carry the IPPC mark - the wheat-symbol stamp - with four elements: the IPPC wheat logo, the two-letter country code (CN for China), the producer or treatment facility's registration number, and the treatment code (HT, MB, DH or SF), plus an optional DB for debarked wood. The marking must be permanent and legible - steel stamp, branding or heat stamp; paper stickers are not accepted - and it must appear on at least two opposite sides of the piece. Bark tolerance has its own rule: small strips of bark are allowed only if narrower than 3 centimetres, or - where wider - under 50 square centimetres per piece; beyond that, the wood can be ordered for treatment, destruction or re-export at the importer's cost.
Why shipments actually get refused
Customs refusals trace back to a short list of causes: a missing stamp (the wood is simply deemed untreated); an illegible or damaged stamp from a reused pallet; live pests or boreholes visible even on marked wood; and fake or untraceable producer codes when facilities are checked against the register. The stamp on the wood itself is the compliance basis in the major markets: US CBP does not accept paper treatment certificates in place of the mark, and for wood packaging originating in China, Canada likewise works from the IPPC mark; New Zealand does not require certification for ISPM-15 marked wood packaging - while some markets separately ask for a solid wood packing declaration with the shipping documents, and China's export side requires the wood to be treated and marked by a registered facility. The consequences of non-compliance are still expensive: holds, re-palletization or treatment where a market allows it, and re-export orders that trade advisories report costing importers thousands of dollars per container. In the United States, non-compliant wood packaging cannot simply be fumigated on arrival - it must be re-exported or disposed of in a compliant way, and US rules provide for liquidated damages where an emergency action order is not followed.
The simplest fix: skip solid wood
Because engineered-wood and plastic pallets are outside ISPM 15, many importers now ask their factory to ship on plastic or plywood pallets and close the topic permanently. Plastic has a second advantage for tool loads: unlike under-dried solid wood, it does not release moisture into the container, removing one contributor to the condensation cycle behind rust claims. Where solid wood is unavoidable - heavy machines, certain crate configurations - the controls are: buy HT-treated wood from a registered facility, and treat the IPPC stamp and the solid wood packing declaration as part of the shipping documents. Watch mixed constructions too: a plywood deck on solid-wood blocks still contains regulated solid wood.
A five-point pre-shipment checklist
1) Confirm the pallet material in writing before production: solid wood, engineered wood or plastic. 2) If solid wood, specify heat treatment (HT) from a registered facility. 3) Request photos of the IPPC stamp and the treatment record issued by the registered treatment factory before the cargo leaves - not after it arrives. 4) Attach a signed solid wood packing declaration to the commercial invoice and packing list. 5) Check each destination's document expectations with your customs broker in advance - some markets ask for a solid wood packing declaration to travel with the mark.
Want the pallet and packing details confirmed before you book? Send the destination market and model mix through the contact page - the export team answers with carton data, pallet options and pack protection for each line.
