DFB
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- Aug 12, 2019
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Koch Chemie Speed Glass and Glass Cleaner Pro
Koch Chemie have a couple of glass cleaners in their lineup. Glas Star GLA is a concentrate alcohol-based product aimed at the professional user and sold in 10-litre drums. For this post, I’m focusing on Speed Glass in the blue bottle range and Glass Cleaner Pro GC in the white bottle range. Reading the MSDS, these two products are the same, just packaged differently.
Something that caught my attention was the fact Speed Glass and GC are NOT alcohol based. Looking at the MSDS, it contains the same ingredient used in Quick & Shine, which is said to be a “smoothness additive” and gloss enhancer. This is not surprising as I’ve found Speed Glass to have a highly lubricated feel, producing a very slick and glossy surface afterwards. These two will also leave behind some very minor protection, but not to the extent ClarifyPhobic would. Having said that, I’ve had the odd occasion where Speed Glass has left some mild residue, no doubt due to the lack of IPA to flash properly.
Both Speed Glass and GC are ready to use and have that classic KCx “fresh raspberry” fragrance. They can be used on interior and exterior glass, and are tint safe. KCx also suggests these products are safe to be used on screens, buttons and glossy surfaces such as piano black.

How To Use –
Speed Glass and GC are used like any other glass cleaner.
1. Prime your towel with product.
2. Apply one to two sprays per section, wipe with your towel, flip or switch to a dry towel and wipe till streak free.

Usage Notes -
The key to success when it comes to glass is the method, so here are a few steps to consider –
- Don’t bother attempting to clean glass that has been in the sun or is warm/hot to touch. The product will flash too quickly and leave behind streaks and witness marks. Took me ages to figure that one out.
- Towel selection is crucial! You want short nap, high density towels for glass, otherwise you will be dealing with streaks and linting issues. Aim for waffle weave or pearl weave towels such as the TRC Dry Me A River or FTW. I've tried dedicated glass towels, and while they work well, I keep coming back to those TRC waffle weaves (pictured below).
- For interior glass, I never spray directly like I would for exterior glass. Most automotive glass cleaners are interior safe, but I think you want to avoid dousing your interior plastics with glass cleaner. Instead, spray liberally into the towel.
- For neglected interior glass, you may need to clean twice. The first round is your mow-down, the goal is to cut back as much grime as possible. For the second round, you then swap to clean towels, the aim to remove anything left behind in the first pass and deliver a streak free finish. This method limits transferring grime from window to window, which in effect will get you a clean and clear finish. This method is why I recommend having at least 4 glass towels per vehicle.

Final Thoughts –
Personally, I think these two products are best for well-maintained glass. While I do love the slick feel and glossy look, I find the more basic the glass cleaner, the better they perform in ALL situations. That’s why I’m grabbing Stoner Invisible Glass the most often, it contains no dyes and no scents, its just a glass cleaner.
Koch Chemie have a couple of glass cleaners in their lineup. Glas Star GLA is a concentrate alcohol-based product aimed at the professional user and sold in 10-litre drums. For this post, I’m focusing on Speed Glass in the blue bottle range and Glass Cleaner Pro GC in the white bottle range. Reading the MSDS, these two products are the same, just packaged differently.
Something that caught my attention was the fact Speed Glass and GC are NOT alcohol based. Looking at the MSDS, it contains the same ingredient used in Quick & Shine, which is said to be a “smoothness additive” and gloss enhancer. This is not surprising as I’ve found Speed Glass to have a highly lubricated feel, producing a very slick and glossy surface afterwards. These two will also leave behind some very minor protection, but not to the extent ClarifyPhobic would. Having said that, I’ve had the odd occasion where Speed Glass has left some mild residue, no doubt due to the lack of IPA to flash properly.
Both Speed Glass and GC are ready to use and have that classic KCx “fresh raspberry” fragrance. They can be used on interior and exterior glass, and are tint safe. KCx also suggests these products are safe to be used on screens, buttons and glossy surfaces such as piano black.

How To Use –
Speed Glass and GC are used like any other glass cleaner.
1. Prime your towel with product.
2. Apply one to two sprays per section, wipe with your towel, flip or switch to a dry towel and wipe till streak free.

Usage Notes -
The key to success when it comes to glass is the method, so here are a few steps to consider –
- Don’t bother attempting to clean glass that has been in the sun or is warm/hot to touch. The product will flash too quickly and leave behind streaks and witness marks. Took me ages to figure that one out.
- Towel selection is crucial! You want short nap, high density towels for glass, otherwise you will be dealing with streaks and linting issues. Aim for waffle weave or pearl weave towels such as the TRC Dry Me A River or FTW. I've tried dedicated glass towels, and while they work well, I keep coming back to those TRC waffle weaves (pictured below).
- For interior glass, I never spray directly like I would for exterior glass. Most automotive glass cleaners are interior safe, but I think you want to avoid dousing your interior plastics with glass cleaner. Instead, spray liberally into the towel.
- For neglected interior glass, you may need to clean twice. The first round is your mow-down, the goal is to cut back as much grime as possible. For the second round, you then swap to clean towels, the aim to remove anything left behind in the first pass and deliver a streak free finish. This method limits transferring grime from window to window, which in effect will get you a clean and clear finish. This method is why I recommend having at least 4 glass towels per vehicle.

Final Thoughts –
Personally, I think these two products are best for well-maintained glass. While I do love the slick feel and glossy look, I find the more basic the glass cleaner, the better they perform in ALL situations. That’s why I’m grabbing Stoner Invisible Glass the most often, it contains no dyes and no scents, its just a glass cleaner.