| abstract |
(57) [Summary] A matte type permeable waterproofing composition, When the composition is applied to, for example, a mortar-lined cast iron pipe, a waterproof structure having excellent crack resistance is obtained. SOLUTION: The composition contains a vinyl polymer (A), an alkoxysilane (B) and inorganic fine particles (C), and the mixing ratio thereof is 100 parts by weight of the vinyl polymer (A). B) 10 parts by weight or more, 1000 Parts by weight or less, and based on 100 parts by weight of the total amount of the vinyl polymer (A) and the alkoxysilane (B), The inorganic fine particles (C) are 1 part by weight or more and 50 parts by weight or less, and the average particle size of the primary particles of the inorganic fine particles (C) is 1 nm. As described above, a permeable waterproof composition characterized by being 100 nm or less, and a waterproof structure obtained by applying the permeable waterproof composition to an inorganic base material. |