Abstract: The invention relates to a termicidal product to prevent the presence of and/or to destroy termites in a suitable surrounding medium. This product is characterized in that it has the form of an elongated solid body constituted a) of an extruded core constituting a solid degradable macroscopic matrix based on at least a polymeric binder and a substance active against termites, b) of an envelope of the core containing at least one substance active against termites, this active substance of the envelope being releasable in the surrounding medium, at least under the influence of moisture in the surrounding medium, such that, when the product is exposed to the surrounding medium, the quantity of active material freed per unit time within the surrounding medium by the envelope decreases with time.