http://www.nikwax.com/en-us/webquiz/index.php -take the quiz. You have to get the questions correct, but you can take the quiz again until you do. You can get samples from them every 2 months, it’s been   2 months since this was last posted.

http://www.nikwax.com/enmygb/webquiz/index.php -you can also take the quiz on this page to get a free Waterproofing Wax for Leather Sample.

https://www.trextape.com/sign-up-form -fill out the form to get a Free T-rex Tape Sample – thanks tonywt1

https://www.thelaundress.com/accessories-sample-request.html -fill out the form to get a Free The Laundress Laundry Care Sample.

https://growmazing.net/free-sample/ -fill out the form to get a Free GROWmazing Insecta-Pro & Fungi-Pro Sample.

https://www.samplesource.com/? -login or register to get Free Spring  Samples from SampleSource

https://trynoniessentialoils.com/3939017/ -fill out the form to get a Free Tahitian Noni Essential Oil Sample.

https://lafreshgroup.com/ -load the website and wait for the form to appear on that page. Fill out the form to get Free LA Fresh Wipes Samples.
If that doesn’t work you can try this link.

https://www.qdrinks.com/try -fill out the form to get a Free Q Drinks Carbonated Mixer Beverage Sample.

https://smartypantsvitamins.com/free-samples/95f66158521299abbc4b5b3/ -fill out the form to get a Free Smarty Pants Gummy Vitamins Sample.