Absolutely great and fast shipping and a great team

Worked great to stick substrate to the walls of my foamed enclosure.

Anyone building backgrounds needs to have this as their standard silicone. Apply generous amounts and always purchase one more than you think you'll need. The fumes are pretty powerful, apply in a well ventilated area.

Looked for viv safe silicone at all the hardware stores and could never find black. Ordered it from Josh's and it was great for my custom background. Worked great for holding substrate on the foam background and holding waterfall together. Will continue to keep this on hand for future background builds.

So far, so good. Very durable. I would, however, recommend you think of a good way to spread this stuff out on your background beforehand. I used a disposable brush and it was soon too gooped up to effectively coat the background (also think too flimsy!). I recommend a stiff wire brush to help coat the crevices, or to get disposable gloves and just use you fingers to distribute the silicone.