Heat Treated Pallets: ISPM-15 Compliance Guide
Heat treated pallets are wood pallets that have been processed to kill pests and pathogens, making them safe for international shipping. This treatment is required by ISPM-15, an international standard.
What is ISPM-15?
ISPM-15 (International Standards for Phytosanitary Measures No. 15) is a regulation that requires wood packaging materials used in international trade to be treated to prevent the spread of invasive insects and plant diseases.
Countries Requiring ISPM-15
Almost all countries require ISPM-15 compliance, including:
- All EU member states
- United States & Canada
- China & Japan
- Australia & New Zealand
- Most of South America, Africa, Asia
Exception: Pallets shipped domestically within a country don't need ISPM-15 treatment.
Heat Treatment Process
HT (Heat Treatment) Requirements
The wood must be heated until the core reaches:
| Parameter | Requirement |
|---|---|
| Core temperature | 56°C (132.8°F) minimum |
| Duration | 30 minutes minimum |
| Applies to | Entire pallet including core |
Alternative: MB (Methyl Bromide)
Methyl bromide fumigation was once common but is now:
- Banned in EU, Canada, and many countries
- Being phased out globally
- Not recommended for most applications
The ISPM-15 Stamp
What the Stamp Looks Like
Every compliant pallet must have a stamp containing:
```
[IPPC logo] [Country Code]-[Producer Code]
[Treatment Code: HT or MB]
[Wood type: DB (Debarked)]
```
Example Stamp
```
[IPPC] US-12345
HT
DB
```
- US: Country of treatment (United States)
- 12345: Certified treatment facility number
- HT: Heat Treated
- DB: Debarked
Non-Compliant vs Compliant
| Non-Compliant | Compliant |
|---|---|
| Raw wood pallets | Heat treated (HT stamp) |
| Unknown origin | Traceable supplier |
| No stamp | IPPC stamp visible |
| Risk of seizure | Smooth customs clearance |
Consequences of Non-Compliance
If your shipment uses non-compliant pallets:
- Customs hold: Shipment detained at port
- Treatment at destination: Expensive ($500+ per shipment)
- Return to sender: Shipper pays all costs
- Destruction: Pallets destroyed, goods repacked
- Fines: Up to $10,000+ in some countries
ISPM-15 Exempt Materials
Some packaging doesn't require treatment:
| Material | Treatment Needed? |
|---|---|
| Plywood | ❌ No |
| Particle board | ❌ No |
| OSB | ❌ No |
| Plastic pallets | ❌ No |
| Metal pallets | ❌ No |
| Cardboard | ❌ No |
| Solid wood (thin <6mm) | ❌ No |
| Raw wood pallets | ✅ Yes |
Cost Comparison
| Pallet Type | Cost | ISPM-15 Compliant |
|---|---|---|
| Standard wood (untreated) | $10-20 | ❌ Domestic only |
| Heat treated wood | $15-30 | ✅ Export ready |
| Plastic pallet | $50-150 | ✅ Exempt |
| Plywood pallet | $25-40 | ✅ Exempt |
Best Practices for Exporters
- Always verify the HT stamp before shipping
- Keep records of pallet supplier certifications
- Inspect pallets for visible stamps (both stringers)
- Consider plastic for frequent international shipping
- Work with certified pallet suppliers only
Shop Export-Ready Pallets
Browse our selection of plastic pallets (ISPM-15 exempt) and certified wood pallets at PalletCorner.