MOLD BOSS combines powerful cleaning action with a stain remover to clean and whiten difficult mold and mildew stains. Recommended for use on resistant surfaces including: tile, grout, vinyl shower stalls and doors, shower curtains, sinks, wood and other surfaces with mold and mildew stains. PLEASE NOTE: A TRIGGER SPRAYER IS NOT INCLUDED DUE TO SHORTAGES RELATED TO COVID-19. MOST TRIGGER SPRAYERS WILL FIT THIS BOTTLE, EVEN FROM HOUSEHOLD PRODUCTS YOU MAY ALREADY USE. MAKE SURE TO WASH AND FLUSH OUT ANY EXISTING PRODUCTS FROM THE TRIGGER SPRAYER YOU USE.