Permatex 24835 Medium Strength Threadlocker Blue Gel, 35 g

Customers find this threadlocker effective, particularly in confined spaces, and appreciate that it stays in place better than the liquid version. The product is easy to apply and less messy than alternatives, with one customer noting it works well on small 3-5mm screws. They like its versatility, with one mentioning it's perfect for gunsmith projects, and praise its durability, noting it breaks free when needed.