This product can be applied underwater? Or does it have to be applied and cured on a dry surface first?

Yes, can applied under water. I got piping that have very small water leaked that is why I bought this one. I applied and it seems it stop the leaked up to now. Hope this helps.

can this be used to repair a cracked skimmer?

I would give it a try. I used to repair a leaky exhaust port on a motor yatch.

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Underwater Magic Sealant, 290ml/9.8oz Tube, White

Underwater Magic Sealant, 290ml/9.8oz Tube, White

Product ID: 41353198

Details

Brand
Underwater
Item Weight
0.01 Ounces
Item dimensions L x W x H
9.05 x 1.95 x
Material
Acrylic
Style
Compact

🌊Seals underwater flawlessly

🧪Chemical & chlorine resistant

🌡️Temp resistant -40°C to +200°C

₨1978

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Seal the impossible—underwater magic that sticks like a pro!

TEMPERATURE TOUGHNESS - Withstands extreme temps from freezing -40°C to scorching +200°C for short bursts.
ECO FOOD SAFE FORMULA - 100% silicone-free, solvent-free, and safe near food areas—keeping your environment clean and compliant.
USER FRIENDLY APPLICATION - No mixing, odorless, and fits standard caulking guns for effortless use—even in a filled pool.
CHEMICAL CHLORINE SHIELD - Resistant to saltwater, chlorine, oils, grease, and harsh chemicals for lasting durability.
UNMATCHED UNDERWATER PERFORMANCE - Seals leaks and gaps underwater with commercial diver-grade reliability.

Underwater Magic Sealant is a 290ml white, one-component gel designed for professional-grade sealing underwater and in harsh chemical environments. It offers permanent elasticity, abrasion resistance, and temperature tolerance from -40°C to +200°C. Odorless and free from harmful solvents and silicone, it applies easily with standard caulking guns and is safe for use near food. Ideal for pools, marine repairs, and chemical-exposed surfaces, it delivers long-lasting, waterproof performance unmatched by typical sealants.

Specifications

ASIN	B01NCUU1N1
Best Sellers Rank	#56,237 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #188 in Hardware Sealers
Brand Name	Underwater Magic
Color	White
Compatible Material	[Most Materials, Excluding Vinyl]
Customer Reviews	4.3 4.3 out of 5 stars (64)
Item Dimensions	9.05 x 1.95 x 1.95 inches
Item Form	Gel
Item Weight	0.01 Ounces
Manufacturer	Underwater Magic
Material Type	Acrylic, Polyurethane
Model	UWM-01
Number of Items	1
Part Number	UWM-01
Style Name	Compact
Surface Recommendation	Tile, Concrete, Plastic
UPC	712190587963
Unit Count	9.8 Fluid Ounces
Water Resistance Level	Waterproof

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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₨1978

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews