Coltosol F is a moisture-curing, radio-opaque, white temporary filling material designed for short-term dental applications, lasting 1?2 weeks. It is a zinc oxide/zinc sulphate-based cement used for temporary fillings in Class I and II cavities and for temporary sealing in endodontic procedures. Coltosol F hardens by absorbing moisture, providing a dense, secure marginal seal. However, care should be taken with thin enamel margins, as expansion during hardening may cause fractures. It is not recommended for cavities extending under the gingiva or for long-term use in vital teeth. While generally safe, dehydration in cavities of vital teeth can cause temporary discomfort, so keeping the area moist before application is important.