This Rodent Seal from Romax is specially formulated with stainless steel fibres within the silicone. Incorporating these fibres into the sealant means that, once set, rodents like mice and rats will not be able to chew through. Ideal for filling in small holes or gaps in your property to deny access to rodents, as well as deter them. You will require a Caulking Gun to apply this sealant to your desired area.