FallsFoam 12 Oz Straw Applicator – Durable Black Waterfall Foam for Rock Gaps and Spillways

The FallsFoam 12 Oz Straw Applicator is a black polyurethane foam designed for precise application in pond and waterfall installations. It expands to fill gaps between rocks, securing stones and diverting water to flow where it’s needed most—over spillways and cascades, not underneath or behind them.

Unlike traditional yellow foams, this black-colored formula blends seamlessly with rock and gravel, providing a clean and natural look in pondless waterfalls, fountains, and streambeds. The included straw-style applicator offers accuracy and control, ideal for detailed stonework or tight crevices.

Once cured, this foam is safe for fish, plants, and pond life. It also resists UV light and weathering, ensuring long-lasting performance in both residential and commercial water features. The FallsFoam straw applicator delivers convenience without the need for expensive guns or compressors—just shake, attach, and foam.

Whether you’re a contractor or DIY enthusiast, this expanding foam is a dependable solution for managing water flow and locking rocks into place.

Features

Natural Appearance
Black foam blends in with rocks and gravel for a discreet finish.

Precise Application
Straw-style nozzle allows controlled foam placement in tight spaces.

Fish & Plant Safe
Cured foam is non-toxic and suitable for aquatic environments.

Long-Lasting Hold
Weather-resistant and UV-stable for outdoor use.

No Extra Equipment Required
Applies easily without the need for foam guns or tools.