• March 16, 2026
• Deka Kraft
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Heat Treatment vs. Chemical Treatment: What Manufacturers Need to Know Before Buying New Wooden Pallets

Introduction to Wooden Pallet Treatments

Manufacturers rely heavily on wooden pallets to transport goods safely across supply chains. However, untreated wood can carry insects, fungi, and plant diseases that may spread between countries. To prevent this risk, international regulations require wood packaging materials to undergo specific treatments before they are used in logistics and export.

Two main treatment methods dominate the pallet industry:

• Heat Treatment (HT)

• Chemical Treatment (Fumigation using methyl bromide)

Understanding the differences between these methods is essential before purchasing new wooden pallets. Choosing the right treatment affects safety, regulatory compliance, cost, and environmental impact.

Why Wooden Pallets Must Be Treated

Global Trade and Pest Control Regulations

Wood is a natural material that can harbor pests such as beetles, larvae, and termites. When these organisms travel internationally inside pallets, they can damage forests and agricultural systems in new regions.

To prevent this, international shipping follows the ISPM 15 standard, which requires wooden pallets to undergo approved treatments that eliminate pests before they cross borders.

If pallets fail to meet these standards, shipments may face:

• Customs rejection

• Quarantine delays

• Additional treatment costs

• Potential destruction of the cargo packaging

For manufacturers involved in export, using properly treated pallets is not optional—it is a regulatory requirement.

Understanding Heat Treatment (HT) for Wooden Pallets

How Heat Treatment Works

Heat treatment is the most widely used pallet treatment method worldwide. In this process, wooden pallets are placed inside a specialized kiln or heating chamber. The wood is heated until its internal core reaches a specific temperature capable of killing pests.

Temperature and Time Requirements

To comply with international standards, the wood must reach:

• Minimum core temperature: 56 °C (132.8 °F)

• Minimum duration: 30 minutes

This process effectively eliminates insects, larvae, eggs, and harmful microorganisms within the wood.

Once the treatment is complete, the pallets are stamped with an ISPM-15 “HT” mark, indicating they are safe for international shipping.

Advantages of Heat-Treated Pallets

Heat-treated pallets have become the industry standard for many manufacturers because they offer several benefits.

Environmental and Safety Benefits

1. Chemical-Free Process
   Heat treatment relies entirely on temperature rather than chemicals, leaving no residues on the wood.

2. Safer for Food and Pharmaceutical Products
   Because no chemicals are used, HT pallets are suitable for industries with strict contamination rules.

3. Eco-Friendly Solution
   The process avoids harmful substances that may damage the ozone layer or environment.

4. Improved Durability
   Heat treatment reduces moisture content and helps strengthen the wood fibers, improving pallet lifespan.

5. Global Acceptance
   Most countries recognize heat-treated pallets as the safest method for pest control in shipping logistics.

For these reasons, heat treatment is often the preferred option for modern supply chains.

Understanding Chemical Treatment (Fumigation)

What Is Methyl Bromide Fumigation

Chemical treatment involves placing wooden pallets in a sealed chamber and exposing them to a pesticide gas—most commonly methyl bromide (MB). The gas penetrates the wood and kills pests throughout all life stages.

The fumigation process typically involves:

• Sealing pallets in a controlled environment

• Introducing methyl bromide gas at a specific concentration

• Allowing exposure for several hours or longer

After treatment, pallets receive an “MB” stamp indicating chemical fumigation.

Limitations of Chemically Treated Pallets

While chemical fumigation was once widely used, it has become less common due to several disadvantages.

1. Health and Safety Risks
   Methyl bromide is toxic and can pose risks to workers if not handled correctly.

2. Environmental Concerns
   The chemical is associated with ozone depletion, leading many countries to restrict or ban its use.

3. Chemical Residue
   Trace residues may remain in the wood, which can be problematic for sensitive industries like food or pharmaceuticals.

4. Regulatory Restrictions
   Some regions, including parts of Europe, prohibit methyl bromide fumigation entirely.

Because of these issues, chemical treatment is steadily being replaced by heat-based methods.

Heat Treatment vs. Chemical Treatment: Key Differences

Safety and Environmental Impact

Heat treatment is considered safer for both workers and the environment because it uses only heat and leaves no chemical residues. In contrast, fumigation uses toxic gases that require strict handling procedures.

Compliance with International Standards

Both treatments are technically allowed under ISPM-15 regulations, but heat treatment is now the preferred method globally because it avoids environmental risks and chemical exposure.

Cost and Operational Considerations

Typical cost differences include:

Heat treatment may have a slightly higher upfront cost in some regions but often provides better long-term value due to durability and regulatory acceptance.

Regulatory Standards: ISPM 15 and Global Shipping Requirements

What Is the ISPM 15 Standard

ISPM 15 is an international regulation developed to prevent the spread of pests through wood packaging materials used in global trade.

The regulation applies to:

• Wooden pallets

• Crates

• Dunnage

• Packaging materials

How Treatment Certification Works

After treatment, pallets receive a unique IPPC stamp containing:

• Country code

• Manufacturer code

• Treatment method (HT or MB)

This stamp proves compliance and allows pallets to move freely through international borders.

When Manufacturers Should Choose Heat-Treated Pallets

Industries That Prefer HT Pallets

Heat-treated pallets are commonly used in:

• Food manufacturing

• Pharmaceuticals

• Electronics

• Consumer goods exports

These industries prioritize hygiene and regulatory compliance.

Export and Food Safety Considerations

Companies that export products frequently choose HT pallets because they are accepted worldwide and eliminate concerns about chemical contamination.

When Chemical Treatment May Still Be Used

Special Cases and Limitations

Although less common today, chemical fumigation may still be used when:

• Pallets cannot fit inside heat treatment kilns

• Certain emergency pest control measures are required

• Local regulations still permit fumigation

However, these cases are becoming increasingly rare as environmental regulations tighten.

Factors to Evaluate Before Buying New Wooden Pallets

Manufacturers should consider several factors before purchasing pallets.

Supply Chain Needs

Determine whether pallets will be used for:

• Domestic shipping

• International export

• Long-term storage

Sustainability Goals

Many companies now prioritize environmentally friendly logistics solutions, making heat treatment the more attractive option.

Budget and Long-Term Costs

While heat-treated pallets may cost slightly more initially, they often last longer and reduce regulatory risks.

Frequently Asked Questions

1. Are heat-treated pallets better than chemically treated pallets?

Yes. Heat-treated pallets are safer, environmentally friendly, and widely accepted for international shipping.

2. What does the HT stamp on pallets mean?

The HT stamp indicates the pallet has been heat-treated according to ISPM-15 regulations.

3. Are chemically treated pallets still used today?

They are still allowed in some cases but are becoming less common due to environmental restrictions.

4. Can heat-treated pallets be reused?

Yes. As long as the ISPM-15 stamp remains visible and the pallet is not damaged, it can be reused.

5. Do heat-treated pallets contain chemicals?

No. The process uses heat only, making it safe for food and pharmaceutical transport.

6. Why is methyl bromide being phased out?

Because it is toxic and contributes to ozone depletion, many countries are limiting or banning its use.

Conclusion

Choosing between heat treatment and chemical treatment is a critical decision for manufacturers purchasing new wooden pallets. While both methods can meet international phytosanitary standards, heat treatment has become the dominant solution due to its safety, environmental benefits, and universal acceptance.

For companies involved in global logistics, investing in heat-treated pallets ensures smoother customs clearance, reduced regulatory risk, and a more sustainable supply chain.