A Study to Evaluate the Dentinal Hypersensitivity Efficacy of Two Experimental Mouthwash Formulations

Inclusion Criteria: * Participant who demonstrates understanding of the study and willingness to participate as evidenced by voluntary written informed consent and has received a signed and dated copy of the informed consent form. * Participant understands and is willing, able and likely to comply with all study procedures and restrictions. * A participant with a minimum of 20 natural teeth and in good general health who suffer from tooth sensitivity. * At screening, participants with a minimum of four accessible nonadjacent teeth (incisors, canines, or pre-molars) with signs of facial/cervical gingival recession and/or signs of erosion or abrasion. * At screening, self-reported history of Dentinal Hypersensitivity lasting more than 6 months but not more than 10 years. * At Baseline: Minimum of two, non-adjacent accessible teeth (incisors, canines, premolars), that meet all of the following criteria: - Tooth with signs of sensitivity, measured by qualifying tactile stimulus (Yeaple less than or equal to \[\<=\] 20 gram) and evaporative (air) assessment (Schiff Sensitivity Score greater than or equal to \[\>=\] 2) Exclusion Criteria: * Women who are known to be pregnant or who are intending to become pregnant over the duration of the study. * Women who are breastfeeding. * Known or suspected intolerance or hypersensitivity to the study materials (or closely related compounds) or any of their stated ingredients. * Participation in another clinical study or receipt of an investigational drug within 30 days of the Screening visit. * Participation in a desensitising treatment study within 8 weeks of the Screening visit. * Previous participation in this study. * Recent history (within the last year) of alcohol or other substance abuse. * An employee of the sponsor or the study site or members of their immediate family. * Presence of chronic debilitating disease which, in the opinion of the investigator, could affect study outcomes. * Dental prophylaxis within 4 weeks of Screening. * Tongue or lip piercing or presence of dental implants. * Desensitizing treatment within 8 weeks of Screening. * Teeth bleaching within 8 weeks of Screening. * Any participant who, in the judgment of the investigator, should not participate in the study.