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.

Underwater Magic Sealant 290ml 9 8oz Tube White

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$U6128

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Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Seal the deal above and below water—because leaks don’t wait!

TEMPERATURE TOUGHNESS - Withstands extreme temps from freezing cold to near-boiling, ensuring durability in any climate.
USER FRIENDLY APPLICATION - Standard 290ml tube fits any caulking gun for precise, no-mix, no-fuss sealing—even underwater.
CHEMICAL CHLORINE SHIELD - Resistant to seawater, chlorine, oils, and harsh chemicals—perfect for pools and marine environments.
ODORLESS ECO SAFE FORMULA - Free from oxime, acetic acid, isocyanates, and silicone—safe for use near food and sensitive areas.
UNMATCHED UNDERWATER PERFORMANCE - Seals leaks even when fully submerged, bridging aquatic and terrestrial repairs effortlessly.

Underwater Magic Sealant is a professional-grade, 290ml white gel designed to provide permanent, elastic, and waterproof seals underwater and above. Trusted by commercial divers, it resists chlorine, saltwater, chemicals, UV, and extreme temperatures (-40°C to +90°C). Its odorless, solvent-free formula is safe near food and compatible with most materials except vinyl. Ideal for pools, marine repairs, and industrial use, it delivers long-lasting, abrasion-resistant protection with easy application using standard caulking guns.

Specifications

ASIN	B01NCUU1N1
Best Sellers Rank	#33,968 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #75 in Silicone Adhesives
Brand	Underwater Magic
Brand Name	Underwater Magic
Color	White
Compatible Material	[Most Materials, Excluding Vinyl]
Customer Reviews	4.3 out of 5 stars 61 Reviews
Item Dimensions	9.05 x 1.95 x 1.95 inches
Item Form	Gel
Item Weight	0.01 Ounces
Item dimensions L x W x H	9.05 x 1.95 x 1.95 inches
Manufacturer	Underwater Magic
Material	Resin
Material Type	Resin
Model	UWM-01
Number of Items	1
Part Number	UWM-01
Style	Compact
Style Name	Compact
Surface Recommendation	Tile, Concrete, Plastic
UPC	712190587963
Unit Count	9.8 Fluid Ounces
Water Resistance Level	Waterproof

Reviews

J**R

26.07.2025

X**S

12.06.2025

S**N

31.01.2026

C**O

29.06.2025

K**R

21.12.2024

L**.

22.06.2022

D**E

31.08.2024

D**C

14.02.2026

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