I suspect it would be a waste of product most of the time - I am suggesting it for those Behr acrylic jobs, I think it wouldn't be a waste then?

I have tried x-jetting our injectable stripper and to me it just wastes product.

Not that I ever used the x-jet, but wouldn't an x-jet be a relatively fast way to apply chemical to a deck and at the same time get some really strong ratios? Like those really hard decks like Cabots SPF where downstream injectable stripper just doesn't cut it. Or you could mix up a strong batch of HD-80 with glycol/butyl and extra surfactants - downstream it for mild strip jobs and x-jet the really difficult ones? Seems like it would still be much less work than using a delavan pump setup.

since your injectable stripper is already a liquid - I think you would be hard pressed to boost it, as either butyl, propylene glycol will end up diluting your mix. You told me in another post that your injectable doesn't harm latex siding paint - I hate to tell you - the only way you are going to attack acrylics is with something strong enough that will rip into latex siding paint as well. I haven't experimented with it lately, but I can make a mix strong enough to rip products like behr or SPF off with downstreaming - but it would depend on one thing - it would depend upon whether or not I could dissolve my ingredients into a 100% butyl liquid base - as it would need to be 100% in order to be at the 10% dilution rate after downstreaming.

Dan, I want to try boosting our Injectable Stripper for the acrylics like Behr. How much propylene glycol and surfactant did you add to your mix?

I haven't tried that powersolve stuff, but I did try and make HD-80 downstream-able, and then learned real fast how you can't get much more than a cup per gallon dissolved per gallon, which would have translated to 1 oz. per gallon once downstreamed - I knew it wouldn't work. So the initial mix which the HD-80 was in was amended with propylene glycol so now it was 50:50 antifreeze to water. And then I amended loads of surfactant as well. When I was done - I had a mix that stripped off the finishes of two consecutive decks that had 4+ year old stains on them. But it wasn't strong enough to strip any real buildup - but for one of those 'easy' old stain strip kind of jobs, I do believe the propylene glycol added with the surfactant really made the Hd-80 downstream-able. And it was great, because it didn't really harm the wood much - both decks didn't even need to defurr the spindles.