If you make lotions, creams, toners, or any product that contains water, preservation isn't optional. It's one of the most important decisions you'll make as a formulator. And Geogard ECT is one of the cleaner, more reliable options available today.
Here's what it is, how it works, and how to use it correctly in your formulas.
What is Geogard ECT?
Geogard ECT is a broad-spectrum preservative system made from naturally derived ingredients. It's designed to protect water-based and emulsified products from microbial contamination — specifically bacteria, yeast, and mold.
It's water-soluble, which means it integrates easily into the water phase of your formula, and it's considered compatible with a wide range of cosmetic ingredients.
For formulators who want to work with cleaner, more naturally derived inputs without sacrificing protection, Geogard ECT is a well-regarded choice.
Why preservation matters
Any product that contains water — even a small amount — creates an environment where microbes can grow. This includes:
- Lotions and creams
- Toners and facial mists
- Conditioners and hair masks
- Gels and serums
- Any emulsion, rinse-off or leave-on
Without an effective preservative, these products can become unsafe to use in a matter of days, even when they look and smell fine. Preservation protects your customers and protects the integrity of every batch you make.
How to use Geogard ECT
Usage rate: 0.6–1% of your total formula weight. Start at 0.8% if you're unsure, and adjust based on challenge testing.
When to add it: During the cool-down phase of your formulation, once your product has dropped below 40°C (104°F). Adding it at high temperatures can reduce its effectiveness.
pH range: Geogard ECT performs best at a pH of 4–7. This is important. Check and adjust your formula's pH before incorporating the preservative — not after. If your pH is outside this range, the preservative may not perform as intended.
Compatibility: It works well in most water-based and emulsified formulas. If you're working with high concentrations of certain actives or surfactants, it's worth doing a small compatibility test first.
What it won't do
Geogard ECT is not an antioxidant. It won't protect the oils in your formula from going rancid — oxidative stability in your oil phase is a separate concern that requires a separate solution. If your formula contains carrier oils or butters, you'll want to address that independently.
It's also not a substitute for good manufacturing practices. Clean equipment, sanitary workspaces, and proper packaging all work alongside your preservative system — not in place of it.
Is it right for your formula?
If you're making any water-containing product and want a naturally derived preservative that's effective across a broad spectrum of microbes, Geogard ECT is worth having in your formulation toolkit. It's straightforward to use, widely compatible, and performs reliably when used correctly.
Geogard ECT is available now in the Nature Packaged shop. NP+ members receive 20% off every order automatically at checkout.
Shop Geogard ECT here.
