Biokleen M00509 Black Streak Remover - 1 Gallon., 128 Fl Oz (Pack of 1)

This stuff works great! But there are a few things to know before you buy this. Number one, it is Extremely strong... That means you wear gloves. I didn't but I never wear gloves no matter what chemicals I'm working with, I. Don't really care because my hands are so tough, nothing bothers them.... This stuff turned my alligator bulletproof skin into baby skin In one panel. Which is great because the wife is always complaining About the the escalator and elevator grease I get under my fingers and in the dry cracks From work, this cleaned it all out. Number two, this is not good to use on very, very old thin trailer paint. My trailer is 7 years old and has never been washed. The paint is aged and has years of acid rain chewing into it. Many years or minerals and deposits from rain and trees that has been building on it. I could see where this was starting to eat through the paint so I worked in very small areas and worked very fast. If you're careful even with thin old worn paint, it will still do its job without damaging. You just have to be within seconds of being correct on when to scrub, apply and rinse... Very, very small margin of error so if you're not really good, don't do it.. If you let it get on aluminum like fenders, it will etch into them. And then you will be polishing them later. This stuff and aluminum don't go well together. But all in all this stuff is strong. And that's what I wanted. So it is perfect for what I need. And you can see by my pictures it does a pretty good job. Use it full strength and work fast and small areas.. I don't care how tough your skin is wear gloves! If you're a mechanic, do one panel without gloves, it will make your skin look great and soft and your wife will love it No more complaining on how grungy your, your hands look anymore.

First of all we've owned an weekend warrior 5th wheel toybox trailer for 23 years. Yes it has its blemishes but I've kept it CLEAN. It sits outside all year in storage yard. A good power washing usually does the trick but the silicone & lap sealer is now dark & deposits black streaks at bottom of windows & rain gutter lip. I also have discoloration at the awning arms. That being said I've used MANY self proclaimed black streak sprays & cleaners all have disappointed. This cleaner works great & surpassed my expectations. Im pretty meticulous & i dont write reviews on most products. This can be placed in a spray bottle at full strength & wiped on to remove discolorations. Use as directed & wash off with water. It cleans off road grime & diesel exhaust really well. I did not have any issues with the old paint & oxidation. It cleaned spots off of plastic storage doors, entry doors hatches, gas doors & Black Wheelscuffs off interior walls. Use an old towel w texture for rubbing & removing streaks. I highly recommend!

You can believe the good reviews on this product. I seldom bother to write reviews, but thought I might help others by sharing my experience with this item. Over the last 4-5 years of owning an RV with aluminum siding, I have tried many products to remove the black streaks, and not one of them has ever worked until I tried Bio-Kleen. I simply applied it undiluted to a clean terry cloth rag and wiped the affected areas per instructions, and the black streaks were gone. It did require just a little extra wiping for the really bad areas, but it still came off without too much effort. The only down side is that the areas I did looked so good, it forced me to do the whole RV, which ended up taking me hours. I had read in other reviews that this could negatively affect graphics, so I was careful to not apply it directly to them, but I did accidentally get a little on some in areas and it did not cause any problems. I also made sure and rinse each area I applied it to right after I was done. Also, it did remove all wax, so I had to wax the RV afterwards. The end result was an RV that looked brand new. I purchased a gallon to treat my 27.5 foot RV, but I could have gotten away with only purchasing a quart, as it goes a long ways. I have plenty left so I hope I never have to buy more, but if I do it will be Bio-Kleen.

I read the good and bad reviews. I decided to give it a try on my 42' 5th wheel. Some people believe this is a magic potion. You might have to put a little elbow into the hardened black streaks but this stuff does cut thru without damaging the finish. I followed the instructions and every black streak wiped right off. It's not a magic potion that you can spray on and then spray right back off. That might work on some spots but you will have to wipe with a towel to make it look perfect.

Honestly, no better than other black streak removers I have (3 different brands). I was hopeful of less labor, less "elbow grease" to remove black streaks caused by runoff from my camper roof. After using it at 50%, and then 100%, I am not impressed. It takes a lot of effort, and it doesn't remove the entire stain. Same as the other brands. I have found automotive polish is much faster and removes the stain 100%, but much less effort rubbing, so it's faster. I'm doing this by hand, so in the future I'll get one of those 6 inch polishing machines and it'll go in a blink compared to the hours it took last time.

Repeat purchaser of this product. Love it.

Im very happy with this product and MANNN did I doubt it would work. However, it cut through years of neglect and black streaks. I washed my trailer twice and that did nothing for the streaking. I then applied this Bio-Kleen and it worked like a charm. It took some elbow grease scrubbing in a few places but, overall it took it ALL off. Trust me, you can't be a bigger skeptic than I am, if you need those black streaks off your RV, trailer, or motorhome, this is what you need. Thank you to all the folks involved with the formula, you saved me a great deal of money on having this done by a pro AND by not having to get that other stuff that is nearly a hundred bucks. I am a customer for life and I will continue to spread the word. It's so nice to use something that actually delivers on it's promises!

Not a bad product.It works really well on your camper.I like it

Pas besoin de frotter fort et toutes les traces noires disparaissent sans tracas. Je l'ai utilisé sur un revêtement d'aluminium et je le conseille à 100%. Vous ne serez pas déçus. Pas besoin de rincer et laisse beaucoup de brillance.

This product is the only one I have tried that removed black streaks on our pontoon boat. It really improved the look as the accumulation of black streaks over the years looked terrible. I find spraying directly on the streaks works better than on a rag. On the picture the left side is done.

Clean black streaks absolutely 100%

Really does work on baked in black streaks. Does require some rubbing and scrubbing but it gets it near new!

I really thought this would be great given all the good reviews. It takes a lot of manual effort to get the gutters clean. I didn't have a lot of build up yet I couldn't see where the white gutters had oxidized so it removed some of the finish in a few spots. It says to not clean on those areas. It did removed some of the overspray from painting the house on the metal soffits! That was a good bonus. After noticing that it took off paint, I was even more cautious to make sure I didn't overspray on the siding. Spotty looking finish with removal of black streaks and spots even going over it again. It seemed that the cleaning only happens on the first spraying of the product so if it wasn't wet or dense enough, I was left with spotting or what looked like smudges. I used it full strength as was suggested. Not impressed and for the price....... I will look for something else next time.