A method of lubricating a tire cavity and more particularly the interface zone between a safety support and the inside the cavity of a tire enables lubricant to be dispensed in the interface zone only when the mounted assembly comprising the support, the tire and a wheel is in a runflat condition and where the non-instantaneous contact established between the inside surface of the tread and the seal allows the lubrication port to be unblocked. The invention also concerns a lubrication device and a seal enabling the method to be implemented, and a support and a reservoir enabling implementation of the method.