I can't really tell from the Q&A or reviews: Can you apply it to one piece out of water, then mate it to the second piece underwater?

Yes you may........but here is the issue, all glues of this type have a tendency to scab over and it lessens the bonding to the surface. You need to add enough glue that once it scabs you can still put it in the water and break that scab as you try to fasten it to the rock or what ever you are trying to adhere to. Of the glues I have tried to date, this one has a fairly descent response. This site has a good video on the different glues and how to apply them: www.bulkreefsupply.com/

Can i use this to glue my aluminum led light brackets to my plastic tank hood?

It is the exact same thing as super glue, except it's a somewhat thicker, so it should work for your application. However, I have found in doing customization on my aquariums that silicone sealant does a much better job of adhering pieces together - especially when of different materials. Hope this helps.

Can this be used to adhere a pvc pipe inside a rubber grommet?

This is gel super glue. Silicone may adheres to rubber better than super glue.

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Two Little Fishies ATLCF2 Coraffix Cyanoacrylate Adhesive, 2-Ounce

Product ID: 67422097

Details

Brand
Two Little
Item form
Liquid
Material
Ethyl
Special feature
Fast Drying
Specific uses for product
Aquarium and

🧪professional-grade ethyl cyanoacrylate

🪨securely attaches corals to live rock

⏱️20-second rapid bonding

Description

🪸 Stick with the best—make your reef the envy of every aquarist!

TRUSTED BY PROS - Preferred by marine hobbyists and coral cultivators for reliable, long-lasting results.
INSTANT CORAL BONDING - Achieve a rock-solid hold in just 20 seconds—no waiting, no fuss.
PRECISION APPLICATION - Compact 2-ounce bottle designed for easy, mess-free use on fragile specimens.
AQUARIUM GRADE ADHESIVE - Formulated specifically for delicate coral fragging and marine invertebrates.
ENHANCE YOUR REEF AESTHETIC - Keep your coral frags perfectly positioned for a stunning, natural look.

Two Little Fishies CorAffix is a 2-ounce ethyl cyanoacrylate adhesive engineered for rapid, secure attachment of stony corals and sessile invertebrates to live rock in aquariums. Bonding occurs in just 20 seconds, making coral fragging effortless and precise for both hobbyists and professionals.

Specifications

ASIN	B0017JHYV6
Best Sellers Rank	270,820 in Pet Supplies ( See Top 100 in Pet Supplies ) 319 in Aquarium Corals
Brand	Two Little Fishies
Colour	Purple
Compatible Material	Coral
Container Type	Bottle
Customer Reviews	4.1 4.1 out of 5 stars (370)
Global Trade Identification Number	00748172440827
Item Form	Liquid
Item Package Quantity	1
Item Volume	60 Millilitres
Item Weight	0.02 Pounds
Manufacturer	TopDawg Pet Supply
Manufacturer Part Number	481531
Material	Ethyl Cyanoacrylate
Model Number	481531
Number of Pieces	1
Other Special Features of the Product	Fast Drying, Strong
Specific Uses For Product	Aquarium and Coral Culturing
UPC	748172440827
Unit Count	1.1148 square meter
Water Resistance Level	Water Resistant

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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.

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