The T X Direct wont make anything waterproof, it will add a slight water repellency to most materials though.
Correct that they make loads of products for different applications. Their "Tech Wash" is just a cleaner that is safe for waterproof/water resistant fabrics. It doesn't add and water repellency. You can wash anything in it and in fact it is less harsh for your clothing than regular detergent.
Selling the stuff on a daily basis I am aware that nikwax is a company, hence why I specified in my response that I made the assumption the OP was talking about TXDirect; they didn't make it clear what particular product they were requesting information on but TXD being the most used fabric waterproofing of their range it seemed like a reasonably safe assumption to make.
No Nikwax waterproofing makes fabric waterproof, it's adds a water repellency to the fabric. To test this, treat any non-waterproof fabric with any of the Nikwax range and fire a hose at it.
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