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To assess the antimicrobial activity and the physical properties of resin-based experimental endodontic sealers with the incorporation of vegetable extracts obtained from  Bixa orellana ,  Mentha piperita , and  Tagetes minuta  species. The extracts were obtained and characterized by gas chromatography-mass spectrometry (GC–MS), and minimum inhibitory concentration (MIC) against  Streptococcus mutans ,  Enterococcus faecalis , and  Candida albicans . The extracts were individually incorporated into a dual-cure experimental sealer at a mass concentration of 0.5%. A commercial reference RealSeal was used. The sealers were evaluated by measuring the setting time, degree of conversion, dimensional stability, radiopacity, flow, and film thickness of these materials, also and its antimicrobial effect was evaluated using the direct contact test. Data were statistically analyzed by analysis of variance and Tukey’s post-hoc test at α = 0.05 significance level. The physical properties were not influenced by the addition of the vegetable extracts ( p  > 0.05). For  S. mutans , only  T. minuta  and  B. orellana  groups presented antibacterial activity after 24 h of contact ( p  < 0.05). All extracts evidenced an antibacterial effect against  E. faecalis  ( p  < 0.05). The experimental sealers hold promise as a novel vegetable sealer with great antimicrobial activity and also great physical–mechanical properties. Nonetheless, more studies are needed.

Antimicrobial and physical properties of experimental endodontic sealers containing vegetable extracts