To solve problems wherein a conventional asbestos dust catcher containing sodium silicate as a main component is good in the permeability into asbestos-containing layer, but is weak in the adhesivity with asbestos because the dried film is hard and brittle so that the asbestos is apt to become dust at scrapping; also for a polyacrylic emulsion, the dried film is tough and good in adhesivity with asbestos, but the price per kg is higher by 10 times or more than sodium silicate so it is not economical; and the polymer cement process has defects that it is generally highly viscous so that infiltration into the asbestos layer is insufficient and drying and curing are delayed.

This asbestos catcher well-balanced between practicality and economy comprises inexpensive sodium silicate as a principal component and is mixed with an acrylic copolymer emulsion or SBR latex which are good in compatibility, to improve hard and brittle properties and deficient adhesiveness of sodium silicate.