I tried it today and it did leave some swirl marks on the glass on one window but not the rest, so I would be cautious with it. It did perform well though. I used it by hand and it was very effective at removing the stains. I would be very nervous about using it with a low speed polisher though. I would be very concerned it would leave swirl marks. Then you have a much bigger problem.
Looks like a good product thanks for the recommend. Iāll have to try it.
Be ready for a fun clean up!
It sounds like using as little as possible to reduce splatter and cleaning up with a towel first would go along way in containing the amount of clean up. But then again I have not used it so you might be right. It looks like a great product though as far as the performance.
I would remove all the solution with an old squeegee rubber first - & plenty of towels, donāt let it drip on any delicate surfaces. Be ready to throw away any towels you use as well. Then use your good squeegee once youāve mopped up & flushed the chemical away. Sorry to sound so scary, but it aināt nice stuff to work with. I donāt enjoy working with it, but it does the job. Iād much rather work with one restore if I could get it here.
Hi everyone, I have a large stained awning in Sydney Australia, next to a main road. Was looking at the crystal clear 550 and found this link.
https://www.google.com.au/url?sa=t&source=web&rct=j&url=https://www.xo2.com.au/xo2-blog/why-won-t-xo2-supply-winsol-crystal-clear-550-or-any-other-hard-water-mineral-stain-remover-containing-hydrofluoric-acid&ved=0ahUKEwj94bTgqObWAhVMO7wKHSJ1BuUQFggfMAE&usg=AOvVaw3WiwoAQi26-qUnA2cNYevO
They will not even import the product due to health issues.
I just got worried for the people that said ājust mask up you will be fineā the consequences of getting this on your skin is huge.
If your using any harsh chemicals you should always use the proper PPE and strictly enforce this policy for any that will be working along side you.
jeez when I worked with a former company all we used was 550 for hard water stains no masks, just used gloves. damn I feel like an idiot. I was not properly trained.
This problem is very common and I had to seek help from a windows and door installation team to sort out the issue. Here is a very helpful article that may help you to clean windows in three easy steps:
Just give it a try.
GO AWAYā¦
No one wants your dumb hydrophobic rain X crap
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If you use the search function here there are many threads about using rain x on residential glassā¦
(not so stellar reviews @SqueegeeNinjaNJ 
.)
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Well at least you know the proper process now and you can make it part of your process now to protect yourself and your employees in the future.
Buh bye
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1/ How to use it.what too look out for when using, PPE etc.
READ INSTRUCTIONS BEFORE USE.
ā
USE STRAIGHT OR DILUTED BY 50% WITH COOL WATER. ALWAYS WEAR RUBBER GLOVES, PROTECTIVE CLOTHING, BOOTS AND SPLASH GOGGLES. AVOID CONTACT WITH SKIN.
Always use plastic pails and containers.
Do not use metal or painted containers.
Clean window glass before using (CRYSTAL CLEAR-550. CRYSTAL CLEAR-550 is NOT a cleaner. )
ALWAYS TEST GLASS BEFORE APPLYING CRYSTAL CLEAR-550 TO ENTIRE WINDOW.
Check for surface coatings and residues such as silicone treatment, building sealer and waxes.
(According to some glass manufacturers, silicone treatments and building sealers may be removed by applying toluene first to soften the film and a low abrasive rubbing compound to remove the residue.
CHECK BOTH SIDES OF GLASS FOR STAGE II CORROSION.
(GLASS WILL USUALLY TURN WHITE WITH COATINGS AND STAGE II CORROSION WHEN TESTED.)
STAGE II CORROSION IS NOT CORRECTABLE AND GLASS SHOULD BE REPLACED.
Apply CRYSTAL CLEAR-550 with a natural sponge or a clean, white cloth.
Wring sponge or cloth to prevent runoff.
Keep solution from running down any building or other surfaces.
If product runs down the glass, it is being overused.
Apply for one to two minutes, then rinse with water or a dilute solution of trisodium phosphate.
Repeat as necessary.
DO NOT USE CRYSTAL CLEAR-550 ON WINDOW FRAMES OR ANY NON-GLASS SURFACE.
DO NOT USE ON SELF-CLEANING (TITANIUM) GLASS.
RINSE AWAY ANY SPILLS IMMEDIATELY.
NOTE: If glass becomes hazed or white, proceed no further until you can determine if it is a coating, building sealer or Stage II corrosion, or if given permission by supervision or building management personnel.
CAUTION:
Contains Acid: CAS 7664-39-3.
Do not take internally.
Do not rub in with fingers or permit contact with skin or eyes. Always wash hands and contaminated skin after using, paying particular attention to skin under nails.
Avoid breathing vapors.
NOTICE: Manufacturer and sellers will only replace product which is defective.
Manufacturer and sellers are not responsible or liable for injuries, damaged equipment, direct or otherwise, due to incorrect use of this product.
Before using, user shall determine the suitability of this product for his/her intended use and the user assumes all risk and liability whatsoever in connection therewithā¦
Please read about how hydrofluoric acid chemically reacts with glass. Look at some YT videos.
Henry
What Percentage Hydrofluoric Acid are you Talking about??
Winsol 550
Does Not React to Glass it Self.
But Possibly what (Coating/ Materials) is on it.
See below: (Incompatible Materials)
Strong Oxidizing Acids,Aluminium, Tin, Zinc, Bronze and Brass.
Big thing with crystal clear is wear some sort of respirator or use it from an angle where the wind wonāt be blowing it to your faceā¦
My dad and the crew he was working with were using it to clean outside midrise / highrise casements.
He opened the windows and held em while the other guy was cleaning, and at the angle he was at the wind was blowing it in his face.
Apparently itās very rare to get poisoning from CC but if I ever use it Iād use a respirator 
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Yes Safety is Number One For Sure.
But Before even Starting.
Make sure you do a test on the glass.
To see if it Hasnāt Got
Any (Incompatible Materials)
(Coating/ Materials) on it.
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Be careful with HF. I trialed some windows at my house with it before I felt comfy using it on paying customers. I smoked one window lightly letting it sit too long.
Iāve had good luck with One Restore. Like the other guys said, use proper PPE and have a bucket of fresh water on hand and some pure water in a sprayer. (I like to keep frames and what not wet with pure water when using HF to remove stains)
I do 1 part one restore to 3 parts water and it works safely for most stains.
I have had some stains that were so bad they needed polished off, and I used one restore to cut the stain down. (You can run it full strength but you might be taking a higher risk smoking the glass if you do)
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