Will 12oz. cover a large area? small waterfall

This product expands a lot and is used for filling in spaces, stopping leaks around rocks and for keeping rocks from falling or moving once placed. One can should fill in around a good amount of rocks if used as intended. I had a small leak in my koi pond waterfall (a rock worked loose) and this worked beautifully for that repair.

Is is safe for my fish pond

Yes - very safe for fish ponds. I've used it on both our fish ponds for years and no issues.

will it work on WET surface

I believe the surface should be dry and clear of dirt/grease/algae,etc. when it is applied. After it cures it can be wet.

Would this repair a hole in a very thick vinyl in my Fisk pond?

I wouldn't trust it long- term against water pressure and bacteria, etc. You can buy special pond liner repair tape which is black vinyl with extra sticky waterproof glue.

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🛠️ Seal smart, live stylish: The foam that works as hard as you do!

DRIP FREE PRECISION - Smart dispenser straw ensures zero mess and exact foam control every time.
AQUATIC SAFE SEALANT - Formulated safe for ornamental fish and plants, perfect for ponds and fountains.
VERSATILE APPLICATION - Ideal for stone, rock, masonry, concrete, and more—indoor or outdoor.
LONG LASTING DURABILITY - Provides a moisture and mildew-resistant seal that lasts up to 10 years.
ECO FRIENDLY REUSABILITY - Use the same dispenser for up to 30 days—sustainability meets convenience.

Great Stuff 99112849 Smart Dispenser Pond & Stone is a 12 oz polyurethane foam sealant designed for precise, drip-free application with its innovative smart dispenser straw. Safe for use around ornamental fish and plants, it offers a durable, water-resistant seal lasting up to 10 years. Reusable for up to 30 days, this foam is perfect for sealing and bonding stone, masonry, concrete, and other surfaces in both indoor and outdoor environments.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Manufacturer	Dow
Part number	99112849
Item Weight	481 g
Product Dimensions	7.62 x 7.62 x 20.32 cm; 481 g
Item model number	99112849
Size	12 oz
Colour	Black
Material	Polyurethane Foam
Item Package Quantity	1
Number of Pieces	1
Included components	SMART DISPENSER straw
Batteries included?	No
Batteries Required?	No

Great Stuff 99112849 Smart Dispenser Pond & Stone, 12 oz, Black

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