With all due respect to Cabelas, I think whoever told you to use these on waders is wrong.
The only treatment that should be done to breathable waders is to renew the Durable Water Repellency (DWR) coating.
What happens is the Durable Water Repellency (DWR) coating on the exterior fabric of waders gets dirty, impeding the chemical action that causes water to bead up.
Why does a breathable fabric need water repellency? Because when a gortex garment is coated with water, the water vapor that passes through the Gortex membrane is trapped from escaping to the outside air. So the garment cannot breath. The garment acts just like a solid sheet of plastic and your perspiration is trapped and condenses on the inside of the garment and on your clothing. This is a phenomenon called "wet out".
Read what Gortex says.
Restoring Water Repellency - GORE-TEX® Products
"You can restore the garment’s water repellency by applying a topical water repellency restorative (DWR treatment) for outdoor fabrics, available at your local outdoor retailer. We do not recommend wash-in treatments, as they can hinder your garment's breathability."
Here is a primer on how to care for breathable garments by REI.
Rainwear: Durable Water Repellent (DWR) Care
I use Nikwax TX.Direct
. It has performed well for me. The product you use to wash your waders is important. It should be a powder and not a liquid, and it should be unscented. That is to prevent any detergent residues that would interfere with the DWR application or seal the Gortex pores. I use Ivory Snow unscented powder. Alternatively, you can use a residue free product like Sport-Wash.
To use the Nikwax TX.Direct, wash your wader or rainwear and rinse well. Hang it up outside and allow the water to drip off. While still damp, spray the wader or garment with Nikwax TX.Direct and cover all areas. Then put in your dryer and dry on the "Permanent Press Low Heat Cycle." Put the suspenders of the waders into a sock to protect them while the DWR sets.
Follow the manufacturer's direction if you use another DWR.
I wrote an article for our TU Chapter Newsletter years ago.