Sealing of incipient carious lesions in occlusal surfaces has been shown to arrest the progression of the lesions. In this report, we describe for approximal surfaces with noncavitated incipient lesions the clinical procedures for sealant application illustrating this minimally invasive method with 3 clinical cases and scanning electron microscopic images. Palabras clave: approximal carious lesions, case reports, minimally invasive method, pit and fissure sealant