Made for pressure washers. Cleans exterior siding, mildew stains more! Give your cleaning blast a boost with Sun Joe SPX-APC1G heavy duty cleaner pressure washer concentrate formula. Take on your toughest cleaning tasks with ease. Simply mix as recommended to achieve the desired cleaning results, then fill your pressure washer tank or sprayer attachment & power up to produce loads of soapy suds to spray away stubborn gunk grime.