Algal defacement of coated and non-coated porous masonry and wood construction materials is prevented by pre-treatment of the construction material with an aqueous composition of a copolymer that releases 2-propenal (acrolein) over time.

Водорослевый defacement coated и нон-non-coated пористых строительных материалов masonry и древесины предотвращен pre-treatment строительного материала с водяным составом сополимера выпускает 2-propenal (акролеин) над временем.

 
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