Josh's Frogs

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HomeAny CategoryCareAquarium & Fish SuppliesAquascaping SuppliesSilicone & AdhesivesJosh's Frogs Vivarium & Pond Build Foam Sealant - Black (12 oz.)

Josh's Frogs Vivarium & Pond Build Foam Sealant - Black (12 oz.)

$12.99 $15.99
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About This Product

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  • 2 cans = $11.49 each
  • 5+ cans = $10.49 each

Josh's Frogs Vivarium & Pond Build Foam is perfect for constructing backgrounds and filling voids in terrariums, vivariums, paludariums, and ponds! No need for silicone—you can apply background material such as dry coco fiber or peat moss directly to the foam within minutes of application!

This UV resistant foam expands to fill gaps and cracks, small or large, and is easy to use with the included straw applicator. The black color is ideal for uses in which appearance is a factor—much more desirable than the typical off-white foam you may be used to seeing. It also holds up well in both arid and humid environments!

  • Easy to use
  • UV resistant
  • Denser (easier to work with) & faster-curing than other foams
  • Foam color: Black
  • Great for vivarium & paludarium backgrounds, ponds, & waterfalls
  • Fully cures in 12 hours!
  • Safe for animals and plants once cured
  • Coverage area: For backgrounds, ~2.5 ft2 

TO USE: Ensure surfaces to be foamed are clean and free of debris. Apply foam in thin layers, allowing 12-24 hours for foam to dry between applications. Foam can then be carved to desired shape. Foam can also be covered with black silicone and coco fiber, peat, or sand to give it a more natural appearance.

Be careful not to pull the trigger all the way, or else you'll end up with too much foam. 

Not sure how to make a background in a naturalistic vivarium? Check out our blog: Don't Back Down from the Background

Shipping

This product ships to your doorstep. Most orders placed before 2pm ET on business days will ship out the same day.

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Customer Reviews

Based on 5 reviews

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Reviews

Jenna

Great foam

Reviewed on February 3, 2026.

I made a larger order and received these well, they worked as described for my first time making a background, and now it looks great! In the pic, most of the materials used was from Josh's, except the egg crate pannel and the zip ties I used for the false bottom. I'm very happy with the way my background looks!

Ethan

quality

Reviewed on September 29, 2025.

worked excellently in every enclosure I've used it on

Dakota

Must have for enclosure builds!

Reviewed on September 9, 2025.

This foam is the best I’ve used hands down. It is easy to work with, with some practice, and I love that it’s black, so even if any little bits are visible, it’s no big deal. It’s also super strong yet easy to carve and shape.

Jaymie

No other foam

Reviewed on November 24, 2024.

I have used other foams but Josh's frogs is so much better. Will be definitely be ordering more for future projects.

Eric

This product is a game changer!

Reviewed on May 28, 2024.

This black foam looks fantastic in my tank. The color is consistent, and it looks good. After the foam hardened, I used black silicone on top and added a layer of coco fiber to make a nice-looking background. The foam does expand a bit more than I expected, if it's your first time, I recommend trying to spray some on a paper plate before jumping in too quickly.

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