Hello - my name is Heather Lupu. I work for Guardian, the manufacturer of ShowerGuard.

When looking at products like Diamon-Fusion vs. ShowerGuard it's important to note that any product which repels water (like Diamon-Fusion or RainX) is derived from organic chemicals to some extent. It's these organic chemicals which cause water to repel off the glass. However, as with anything organic, they will break down over time. To be fully permanent, ShowerGuard is derived from solely inorganic chemicals. This means your enclosure will maintain its corrosion resistant qualities with zero reapplications. So, it isn't really a question of which product is better, but rather what type of coating are you looking for - one that will repel water (Diamon-Fusion) or one that will permanently protect your glass from corrosion (ShowerGuard)?

Another important thing to do is cross reference what each product offers. Here is what I found based upon the information available to you as the consumer:

CLEANING GUIDELINES for both products are fairly similar: the use of common household cleaners about once a week.

EASE OF DETECTION: Only ShowerGuard has a detector (most of our ShowerGuard Registered Dealers have these on hand when installing the glass) which can actually detect if the coating is present. This is important for installation quality and customer satisfaction.

WARRANTY: Diamon-Fusion offers a lifetime warranty (for the water repellent feature only) on all but automotive glass. If they feel your claim is valid, they send you replacement coating to apply to your glass. ShowerGuard has a lifetime limited warranty, in which we send a technician out to your home to look at the glass and, if it appears there is a problem, we pay for the replacement of new glass. Since the inception of our warranty system, we have never had a coating failure.

I hope this helps, please feel free to email me if you have any further questions at hlupu@guardian.com
www.ShowerGuardGlass.com