Can this be used under water?

Hey there, Thank you for reaching out. It technically can be used below the waterline but it's not recommended if the boat will see > 24 hours of submersion at a time

The label says it is "uv stable", what does that mean? does it provide uv protection?

Yes. Based on the description from Jamestown this is thinned varnish. Varnish has good UV protection but nothing last forever in the sun which is why varnish requires another couple coats every year. This is meant for the first couple of coats in about an 8 coat varnish job. Least that is how I use it. Your option is to thin your own or I have enough varnishing from bare wood that I bought this for convenience for the first couple coats then following with in my case Lust varnish also from Jamestown. I really like the Lust since I can overcoat again in about an hour versus a day for the other varnishes I had been using. Good luck!

Can total boat epoxy be used over the top of this?

I would not put epoxy over any sealer. ......

Is it a oil base water sealant or a stain coloring? What are the ingredients?

It is oil based and delivers a relatively clear coat that fills the wood grain quickly in preparation for varnish. However, you can add a solid stain directly to the sealer to get the “color” you desire.

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🛠️ Flex your fixes with the epoxy that bends but never breaks!

PRO GRADE VALUE - Outperforms competitors at a better price, made in the USA by boaters for boaters.
TEMPERATURE TOUGH - Performs flawlessly in cool 40°F to warm 125°F environments—ideal for any project climate.
USER FRIENDLY FORMULA - Simple 1:1 mix with 40 min pot life and 3-4 hr initial cure for reliable, stress-free application.
WATERPROOF VERSATILITY - Bonds wood, metal, fiberglass, plastics, stone & masonry—even underwater or on damp surfaces.
FLEXIBLE STRENGTH NO CRACK - Absorbs flex stress without delaminating or cracking for lasting structural bonds.

TotalBoat FlexEpox is a two-part flexible epoxy adhesive designed for permanent, waterproof structural bonds that withstand extreme flexing. It features an easy 1:1 mix ratio, cures underwater, and works in temperatures from 40°F to 125°F. Ideal for bonding wood, metal, fiberglass, plastics, stone, and masonry, it offers professional-grade performance with long working times and fast curing, making it perfect for demanding repairs and laminations.

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Global Trade Identification Number	00811932022400
Manufacturer	Jamestown Distributors
UPC	811932022400
Color	Clear
Size	8 ounce
Material type	Water Based
Batteries included?	No
Manufacturer reference	496580
Package Dimensions	17.91 x 15.19 x 11 cm; 998 g
ASIN	B01M0MZ89O

TotalBoat FlexEpox Flexible Epoxy Adhesive (8 Ounce)

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