The Materials Guide allows to find material science databases and to filter them by material class and ways of accessing them.

Dataholz.com

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Dataholz.com contains building physically and ecologically tested and/or approved wood and wood-based materials, building materials, components and joints for timber construction. Extended functions can be used by university members. A one-time registration is required for this.
Keywords building materials
Material Classes Bio-based materials, Polymers, Composite Materials
Links website | DBIS link