Heat Treatment (HT) vs Methyl Bromide (MB) Pallets

Cập nhật: 12/06/2026
  • Heat treatment HT heats the wood core to 56°C for a minimum of 30 continuous minutes - the globally accepted ISPM 15 method.
  • Methyl bromide MB is banned at EU and UK ports since March 2010 - pallets bearing MB marks are rejected on arrival.
  • HT costs roughly 10-20% more than MB in Vietnam but eliminates customs detention and cargo destruction risk entirely.
  • The IPPC stamp on each pallet side shows the treatment code (HT or MB) - always check this before loading a container.
  • ICD Vietnam has supplied ISPM 15 compliant HT pallets for 10+ years - contact: +84 983 797 186 / sales@icdvietnam.com.vn

Heat Treatment HT vs Methyl Bromide MB: Which Pallet Treatment Does Your Export Market Require?

Heat treatment HT and methyl bromide MB are the two phytosanitary treatment methods recognized under ISPM 15 for wooden pallets used in international trade. The practical difference is decisive: HT is accepted worldwide, while MB has been refused at EU and UK customs since 2010 and is being phased out in most developed markets. Vietnamese exporters shipping to Europe, the UK, Turkey, or Israel must use HT-marked pallets - no exceptions. This guide explains how both methods work, where each is accepted, how to read the IPPC stamp, and what to verify before your next shipment leaves the warehouse.

ISPM 15 (International Standards for Phytosanitary Measures No. 15) is the FAO standard that regulates wooden packaging material - pallets, crates, dunnage - moving across international borders. Its purpose is to prevent the spread of invasive insects and plant pathogens hidden in raw wood. Every pallet used in export must carry an IPPC stamp confirming compliant treatment, and the stamp must specify the method: HT or MB. Choosing the wrong treatment for your destination market can mean a shipment detained at the port of entry, quarantine fees, cargo destruction, and missed delivery deadlines.

ICD Vietnam has manufactured and supplied ISPM 15 compliant wood pallets from Vietnam for over 10 years. The questions below reflect what buyers and logistics teams ask most often before placing an order.

What Is Heat Treatment (HT) and How Does It Work?

Heat treatment HT is a thermal process: the entire pallet, including its wood core, must reach a minimum of 56°C and hold that temperature for at least 30 consecutive minutes. The treatment takes place in a certified kiln or heat chamber and typically runs 4-8 hours from loading to unloading, depending on wood species, board thickness, and initial moisture content.

The heat eliminates insects at every life stage - eggs, larvae, pupae, and adults - along with most wood-borne fungi, as required by the IPPC Convention. A secondary effect is equally important: the process drives wood moisture below 18%, the threshold above which mites and mold can re-establish after treatment. This makes HT pallets significantly more resistant to re-infestation during long ocean transits compared to chemically treated pallets where moisture remains unchanged.

After treatment, each pallet is stamped with the IPPC mark on at least two opposite faces - responsible manufacturers stamp all four sides. The stamp includes the IPPC wheat symbol, the two-letter country code (VN for Vietnam), the licensed facility number assigned by the national plant protection authority, and the treatment code HT. Example: a pallet marked IPPC-VN-0456-HT was heat-treated at Vietnam facility number 0456.

What Is Methyl Bromide (MB) Fumigation and Why Is It Being Phased Out?

Methyl bromide MB fumigation uses the chemical compound CH3Br - a broad-spectrum gas applied in a sealed chamber or under a sealed tarp at regulated concentration and duration per ISPM 15. Total processing time is 16-48 hours, including the mandatory aeration period required before pallets can safely be handled by workers.

MB is classified as an ozone-depleting substance (ODS) under the Montreal Protocol (1987), signed by 197 countries. Vietnam ratified the Protocol in 1994. Under the Protocol timeline, developed nations were required to eliminate MB use by 2005; developing nations by 2015, with only tightly controlled critical-use exemptions permitted after those dates. The EU went further: it restricted MB commercially from 2000, banned it entirely in 2005, and since March 18, 2010 rejects any wood packaging bearing an MB mark at all EU ports of entry - regardless of whether the pallet otherwise complies with ISPM 15.

The UK, post-Brexit, maintains the same policy as the EU. Turkey and Israel have both issued similar requirements. The practical result: MB pallet marks are becoming commercially unusable for any serious export operation targeting developed markets.

HT vs MB Pallets: Side-by-Side Comparison

The table below compares heat treatment and methyl bromide fumigation across the criteria that matter most to export buyers and logistics managers.

Criteria Heat Treatment - HT Methyl Bromide - MB
Treatment mechanism Thermal - wood core at 56°C for 30+ min Chemical - CH3Br gas in sealed chamber
Processing time 4-8 hours (full kiln cycle) 16-48 hours (including aeration)
Cost (Vietnam) 10-20% higher than MB Lower initial cost
EU / UK acceptance Accepted - mandatory requirement Rejected since March 2010
USA / Canada / Japan Accepted - preferred by most importers Technically allowed, increasing importer self-restriction
ASEAN markets Accepted everywhere Accepted but trading partners increasingly require HT
Environmental / safety No chemicals - clean process Ozone-depleting; toxic to humans and animals
Re-infestation risk Low - moisture <18% inhibits mold and mites Higher - no drying effect; chemical protection declines over time
Regulatory trend Expanding acceptance globally Progressive elimination - Montreal Protocol

How to Read the IPPC Stamp: HT vs MB on Your Pallet

The IPPC mark is burned or stamped directly onto the wood - never printed on a label that can be removed or transferred. A complete, valid IPPC mark contains four elements in a standardized layout.

A pallet stamped IPPC-VN-0456-HT was produced in Vietnam, at licensed facility 0456, and treated by heat treatment. You can cross-reference the facility number against the official BVTV-published list of licensed HT treatment facilities to confirm authenticity. ICD Vietnam supplies pallets from registered, licensed facilities - treatment certificates with lot number, treatment date, achieved temperature, and duration are available on request.

ISPM 15 requires the mark to appear on at least two opposite faces of the pallet. ICD Vietnam stamps all four sides as standard practice, which simplifies customs inspection regardless of how the pallet is oriented in the container.

For Export Teams: Market-by-Market Acceptance of HT and MB

Export compliance teams need a clear picture of which treatment code each destination accepts before confirming a pallet order. The situation is not uniform and continues to shift toward HT.

EU and UK: HT is the only accepted treatment. MB-stamped pallets are refused at all ports of entry since March 18, 2010 in the EU and at UK borders post-Brexit. There are no exceptions, no critical-use waivers for wood packaging in commercial trade.

USA (APHIS): Both HT and MB are technically accepted under ISPM 15 and USDA-APHIS regulations. However, APHIS conducts random inspections at ports of entry, and many US importers now contractually require HT to avoid inspection delays and because their own sustainability or food-safety policies prohibit MB-treated materials.

Canada and Australia: Both accept HT and MB under ISPM 15, but critical-use exemptions for MB are tightly controlled and diminishing. Standard commercial pallets are increasingly expected to carry HT marks, particularly when the importer is in food, pharma, or consumer goods.

Japan: Accepts both HT and MB. Port inspection thoroughness for MB pallets is high, which can cause clearance delays. Japanese buyers in sensitive categories commonly self-specify HT.

Turkey and Israel: Both require HT. MB-stamped pallets are refused.

ASEAN: Most member states accept both HT and MB per ISPM 15. The practical complication is that many goods produced in Vietnam for ASEAN markets are re-exported onward to EU, UK, or North America by the buyer - meaning HT is the only safe default.

For Procurement Teams: Total Cost of HT vs MB

Procurement teams looking at unit price will see that HT pallets cost roughly 10-20% more than MB pallets from the same Vietnam supplier. That premium reflects the higher energy cost of running certified kilns and the faster throughput limits of heat chambers compared to fumigation tents. At current Vietnam market rates, the typical price differential for a standard 1200 x 1000 mm hardwood pallet is in the range of 15,000-25,000 VND per unit.

The full cost picture is different. A single customs detention event for an MB-stamped pallet shipment arriving at an EU port generates quarantine handling fees, storage charges, inspection costs, and potential cargo destruction - easily exceeding the entire pallet budget for the shipment. One rejection also risks the commercial relationship with the end buyer. The 10-20% premium for HT is not a cost; it is a risk-elimination expense with a calculable return.

Additional calculation for procurement: HT pallets dry to below 18% moisture content, which means lower dead weight per pallet versus fresh or high-moisture wood. On high-volume FCL shipments, the weight reduction can have a measurable impact on freight costs.

5-Point Checklist Before Loading HT Pallets into a Container

The following checklist applies to any Vietnamese exporter using wood pallets for international shipments. Run it before every container loading, not only on new orders.

One additional note on cold-chain shipments: refrigerated container temperatures do not substitute for ISPM 15 treatment. Cold chain pallets destined for export still require a valid HT stamp - customs inspectors check the mark, not the temperature log.

Frequently Asked Questions

What is the difference between HT and MB pallet treatment?

HT (heat treatment) uses thermal energy to raise the wood core to 56°C for a minimum of 30 continuous minutes, eliminating pests without any chemical residue. MB (methyl bromide) fumigation uses a toxic gas in a sealed chamber for 16-48 hours. Both methods satisfy ISPM 15 in principle, but MB is banned at EU and UK ports since 2010 due to its ozone-depleting properties, while HT is accepted worldwide. For any shipment to Europe, the UK, Turkey, or Israel, only HT pallets are permitted.

Does the EU accept pallets with an MB stamp?

No. The EU has refused all wood packaging carrying an MB mark at customs since March 18, 2010. The ban applies regardless of the product inside the container or any other compliance documentation. Pallets stamped MB will be detained, quarantined, and returned or destroyed at the exporter's cost. There are no critical-use exemptions for commercial wood packaging entering the EU under MB treatment.

Which countries still accept MB pallets in 2026?

As of 2026, the USA, Canada, Japan, and most ASEAN nations technically permit MB pallets under ISPM 15. However, the regulatory and commercial trend is clear: US importers in food, pharma, and retail increasingly self-require HT; Canada and Australia are tightening critical-use exemptions; Japan's port inspection rate for MB pallets is high, causing delays. Vietnamese exporters should default to HT for all markets to maintain flexibility and avoid disruption as individual importers tighten their own procurement requirements ahead of potential legislative changes.

Are HT pallets more durable than MB pallets?

In terms of pest and mold resistance after treatment: yes. HT pallets dry to below 18% moisture content, which inhibits mite and mold regrowth throughout the pallet's service life. MB pallets undergo no drying, so moisture levels remain unchanged and chemical protection diminishes over time. In terms of structural load capacity and service life: both treatments produce equivalent results - what determines pallet longevity is wood species, board dimensions, nail pattern, and construction quality, not the treatment method.

How do I verify that a pallet is genuinely HT treated?

Three checks are sufficient for most situations. First, inspect the IPPC stamp directly on the pallet wood - it must be burned or branded into the surface, not printed on an adhesive label. The code must read HT. Second, cross-reference the facility number in the stamp against the official list of licensed HT treatment facilities published by Vietnam's BVTV (Department of Plant Protection) - the list is publicly available. Third, request a treatment certificate from the supplier showing lot number, treatment date, achieved temperature (minimum 56°C), and hold duration (minimum 30 minutes). If the supplier cannot produce this certificate, do not use the pallets for international shipment.

Conclusion

Heat treatment HT is the default choice for any Vietnamese business exporting goods on wood pallets. The 10-20% price premium over MB fumigation is offset entirely by the elimination of customs rejection risk, the flexibility to ship to any market worldwide, and alignment with a clear global regulatory direction toward complete MB phase-out. MB fumigation retains a narrow use case: shipments to destinations that still permit it, where the buyer has confirmed in writing that MB is acceptable, and where HT treatment capacity is constrained. In practice, those conditions rarely align - and the risk of MB marks reaching a restricted market through re-export by the buyer makes HT the only commercially sound default.

ICD Vietnam supplies ISPM 15 compliant heat-treated wood pallets from Vietnam with full treatment certification, IPPC stamping on all four pallet sides, and VAT invoicing. For export specifications, pricing, or sample requests, contact the team directly.

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