Boric acid extension as wood biocide: what changes in 2026

Key data

Manufacturers and distributors of biocides with boric acid for wood protection can operate normally in 2026. The European Commission has adopted Implementing Decision (EU) 2026/1128, which delays the expiration date of boric acid approval as an active substance in product type 8 biocides, avoiding a legal vacuum that would have forced products to be withdrawn from the market or operations to be halted.

This decision is framed within Regulation (EU) No 528/2012 on the marketing and use of biocides, and responds to the need to complete the formal evaluation and renewal process without creating uncertainty for companies in the sector.

What does this regulation establish?

Implementing Decision (EU) 2026/1128 has a specific and limited objective: to delay the expiration date of boric acid approval for its use as an active substance in biocides intended for wood protection (product type 8).

The process of renewing approvals of active substances in biocides is long and technically complex. When that process does not conclude before the current authorization expires, the Commission may adopt extension decisions to prevent companies from being in a situation of unexpected illegality without having committed any infraction.

The measure does not introduce new conditions of use, does not modify labeling requirements, nor does it impose additional obligations on companies. Its function is exclusively to ensure legal certainty during the transitional period.

Economic and operational impact

The direct impact of this decision is positive for affected companies: it eliminates the risk of having to withdraw products from the market, suspend production lines, or manage returns due to expiration of the active substance authorization.

Without the extension, companies would have faced a scenario of uncertainty with relevant operational consequences:

• Possible obligation to withdraw from the market biocidal products with boric acid for wood whose authorization had expired.
• Suspension of distribution and marketing until the renewal process is resolved.
• Costs associated with managing withdrawn stock, returns, and customer communications.
• Risk of penalties for marketing biocides without approved active substance.

The extension avoids all these scenarios. From an operational perspective, no immediate action is required by companies to continue operating normally.

Who does it affect?

Implementing Decision (EU) 2026/1128 directly affects the following actors:

• Biocide manufacturers that use boric acid as an active substance in product type 8 products (wood protection).
• Distributors and marketers of these biocidal products in the European market.
• Construction sector operators that use wood protection products in their processes or projects.
• Wood treatment companies that apply biocides with boric acid in their operations.

It may also have indirect relevance for compliance officers and purchasing departments of companies that acquire wood treatment products, as the continuity of approval ensures the legality of the products they incorporate in their processes.

Practical example

A manufacturer of wood preservative products that markets in Spain and other EU countries a preventive treatment against fungi and insects based on boric acid (classified as product type 8 biocide) had the renewal of the active substance approval pending.

Without Implementing Decision (EU) 2026/1128, upon reaching the expiration date of the current approval, the company would have had to suspend product marketing until the European Commission formally resolved the renewal, with the consequent impact on sales, customer contracts, and inventory management.

With the extension in force since 22 May 2026, that same company can continue manufacturing, distributing, and selling its product without interruption, maintain its active supply contracts, and operate with full legal certainty while the renewal evaluation process is completed.

What should companies do now?

1. Verify that affected products are correctly identified as product type 8 biocides with boric acid as the active substance, to confirm that they are covered by the extension.
2. Continue marketing normally: the extension guarantees legal certainty and does not require any modification to labels, records, or sales processes.
3. Monitor the definitive renewal process of boric acid approval under Regulation (EU) 528/2012, as when it is resolved new conditions or use restrictions could be introduced.
4. Review biocide product records with the competent national authorities to ensure that the documentation correctly reflects the approval status of the active substance.
5. Inform purchasing and compliance teams about the validity of the extension to avoid unnecessary product substitution decisions or poorly managed risk alerts.