Bio‑based paints and coatings are gradually gaining ground in the market. But what does the concept of bio‑based content really mean, and is it sufficient on its own to assess a product’s environmental impact?
In an article written by Buildwise, the authors provide a precise and nuanced analysis to help professionals make informed choices.
What is meant by a bio‑based coating?
Bio‑based coatings (paints, varnishes, lacquers or stains) are made wholly or partly from raw materials derived from biomass, such as oilseed plants. The aim is to incorporate these renewable resources into formulations that are comparable to conventional paints in terms of performance, application and cost. Buildwise nevertheless points out that certain preconceptions persist regarding their use or durability, even though these products are evolving rapidly.
Labels, certifications… and calculation methods
To certify the bio‑based nature of a product, various labels and certification systems exist. However, they do not all rely on the same calculation methods, which makes product comparisons more complex.
Some approaches measure the proportion of bio‑based carbon using carbon‑14 dating, while others are based on a mass balance throughout the entire production chain. Depending on the method used, the declared bio‑based content of the same product can vary significantly.
A high bio‑based content… not always synonymous with a better impact
One of the key messages of the article is clear: a high bio‑based content does not automatically guarantee a low overall environmental impact. The cultivation conditions of raw materials, processing methods, transport, and the final formulation all play a decisive role.
Buildwise therefore recommends prioritizing more comprehensive assessment tools, such as Environmental Product Declarations (EPDs) based on Life Cycle Assessment (LCA), in order to obtain a more accurate picture of environmental impacts.
This article from Buildwise encourages professionals in the sector to look beyond the displayed percentages and to adopt a critical reading of bio‑based claims, by combining technical performance with a comprehensive environmental assessment.
