How can I stop weeds from growing between my patio bricks?

5% acid vinegar will do

Make a mixture of white vinegar and water 50/50 add a dash of soap and salt

I use salted water and water it in once wk

1 Gal of White Vinegar + 1 C. Table Salt + 5-6 Tbsp of liquid Dawn Dish Soap

::: Mix in Watering Can…… Stir Well & Spray on the Weeds. Do not get in on nearby plants or grass, it will kill them too.

I boil a kettle or kettles of water and pour it in the cracks.

Straight vinegar kills all things green.

boiling water helps.

Thank you will the vinegar harm the brick

Here's what I use: Take a spray bottle and cover the bottom with salt and fill it up with vinegar. Add a few drops of dish soap and shake. Spray on the weeds.

https://www.hometalk.com/43299149/all-natural-weed-killer