A waterproof and insect and termite resistant composition comprising inorganic additives and polyester fibres dispersed in a curable and settable acrylate latex, whereby the composition when covering a point of entry of terminates to a building forms a termite barrier. The said composition impregnated into a construction fibre matting either formed in situ or preformed and sealed in place with the said composition across points of entry of termites to form a flexible, waterproof and insect and termite resistant barrier.