Here’s a little more on the different stains and how we deal with them:
While being of very high quality for drinking purposes, in most locations the Central Oregon water supply contains a significant amount of dissolved minerals. Since these minerals mostly come from lava rock which is up to 60% silica, 60% of the minerals in our water are silica based. So, when water droplets are left to evaporate, they leave behind these dissolved minerals. This phenomenon is most noticeable on shiny black surfaces (like your car’s paint) and window glass. With time and enough mineral content, the minerals adhere to the glass surface and build up to the point where they are visible as Hard Water Stains*. And since silica is also what glass is made of, treatments that you may read about online, or things you've tried in other geographic areas, or even what other companies may offer you won't have the desired effect since you're essentially trying to remove glass from glass.
Depending on the minerals present and the degree of damage, these Stage 1 stains can be removed with a mild polishing compound applied by hand or machine. This process is expensive, time consuming, laborious. While some companies may use a potentially dangerous caustic acid product to remove these stains, upon close inspection you will notice "ghost" stains where the acid has left behind a small layer of harder silica based minerals and etched away the glass itself around the water spot.
While removing Stage 1 Corrosion is difficult, removing Stage 2 Corrosion is much more so. At Stage 2 Corrosion, the minerals on the glass have interlocked and bonded so deeply with the glass molecules, that they are integral to the glass structure. These stains are the most frustrating for property owners and most window cleaning companies.
Chemicals are definitely no longer effective at removing this level of damage. The only way to remove this damage is to resurface the face of the glass. This requires using mechanical applicators to apply aggressive polishing compounds or even grinding down the mineral stained glass surface. This is the most expensive type of Glass Restoration short of replacement. MasterPro Techs can remove even these stains.
Vandalism or accidents can cause significant scratches in glass. In many cases, this damage is repairable.
The glass surface is ground down to the base of the scratch and then the surrounding area is tapered down to imperceptibly smooth the transition from the repair area to the untouched glass. Then the glass is given a final polish to restore optical clarity. This is a multistage process requiring specialized equipment and extensive training. However, it typically comes at a significant cost savings over glass replacement.
After any restoration project, an application of glass sealer is recommended until it is confirmed that there is no further danger of Hard Water Staining. You may already be using a low-grade sealer on your car windows. All sealing products attempt to reduce the contact that the Hard Water has with the glass surface but they do not eliminate the need for regular cleaning. These sealers differ in their ability to deal with repeated and prolonged water contact as well as their durability during maintenance cleaning.
To see what clarity MasterPro Service can bring to your glass, click the button to get started.
*The best method for preventing Hard Water Staining is to direct away from glass surfaces all tap and ground water from irrigation systems or other water delivery systems. Care must also be taken to ensure that wind does not blow this water onto the glass.
For glass shower doors, the best prevention is per-use maintenance. Each time after the shower is used, water droplets should be removed with an inexpensive shower squeegee.