Junction Box For New Outside Lights

[Wallawollawalla]

I’ve installed several outside lights I need to make another cable join in a junction box and then fix it to the wall outside the problem I have is i’ve run out of the junction boxes I was using I do have a standard one the plan is to use the standard junction box I have in stock and insulate the inside of the box with sugar mixed with super glue to give it water resistance does anybody know if this will work?

 

[Fitzy]

I’d get a proper electrician in to finish the job.....