Can a small waterfall be made by applying only this to a precrafted frame, made of something like styrofoam?

I don’t think so..I tried this on my fountain & it still leaked..

Is this product safe for ponds with fish?

I used this product to seal a leak around my waterfall. I shut off the pump until the product was completely dry. It sealed the leak and my fish are perfectly fine.

Will this bond to plastic?

Yes it will bond to plastics and rubbers

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TotalPond Waterfall Foam Sealant

Product ID: 340622750

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Details

Material
Polyurethane
Brand
TotalPond
Style
Foam Sealer
Item weight
408 g
Item dimensions L x W x H
7 x 7 x 20.7

💧Ensures efficient water flow

🖤Durable black polyurethane foam

⏱️Fast 5-min tack-free dry

Description

💧 Seal the flow, own the glow!

UNIVERSAL GRIP - Adheres to most surfaces except a few specialty materials—versatility you can trust.
SEAL WITH SPEED - Dries tack-free in just 5 minutes—get your project moving fast!
LONG LASTING CURE - Fully cures within 12-24 hours for a durable, professional finish.
WATERPROOF WONDER - Creates a watertight barrier that channels water perfectly over rocks.
PRECISION APPLICATION - Comes with a nozzle tip for exact foam placement—no mess, no guesswork.

Waterfall Foam Sealant is a single-component black polyurethane foam designed to fill gaps and optimize water flow over rocks. It dries tack-free in 5 minutes and fully cures within 12 to 24 hours, adhering to most surfaces except Teflon, silicone, and polyethylene. Packaged in a 12 oz. can with a precision nozzle, it’s ideal for creating durable, waterproof seals in fountains and waterfalls.

Specifications

Product Dimensions	6.99 x 6.99 x 20.65 cm; 408.23 g
Part number	A16523
Item display weight	1.33 Pounds
Material type	Polyurethane Foam
Manufacturer	Geo Global Partners
Item model number	871980305467
ASIN	B004DL0XJU

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