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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Description

🛠️ Seal it, shine it, own it — the pro’s choice for flawless wood finishes!

EFFORTLESS APPLICATION - No sanding needed between coats—save time and skip the hassle.
INDOOR OUTDOOR READY - Durable enough for waterline exposure—perfect for all your wood projects.
VERSATILE COMPATIBILITY - Seals everything from plywood to oily teak for flawless finishes every time.
ULTIMATE WOOD PROTECTION - UV filters shield wood fibers, preventing cracking and varnish delamination.
FLAWLESS FINISH FOUNDATION - Creates a smooth, clear base that enhances natural grain and color under varnish.

TotalBoat Wood Sealer is a clear, fast-drying primer that seals and smooths all wood types—including oily woods like teak—without sanding between coats. Enhanced with UV filters, it prevents wood cracking and varnish peeling, creating a perfect base for 1-part varnishes. Suitable for indoor and outdoor use, this American-made sealer ensures durable, glossy finishes that highlight natural wood grain and color.

Specifications

Liquid volume	1 Quarts
Item form	Liquid
Global Trade Identification Number	00811932022400
Manufacturer	Jamestown Distributors
UPC	811932022400
Part number	496580
Item Weight	998 g
Package Dimensions	17.91 x 15.19 x 11 cm; 998 g
Manufacturer reference	496580
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

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Wood Sealer TotalBoat

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