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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🛠️ Seal it, skip the stress, shine like a pro!

EFFORTLESS APPLICATION - No thinning or sanding needed between coats—save time and skip the hassle.
INDOOR OUTDOOR READY - Durable for both interior and exterior use above the waterline—your wood’s best defense.
VERSATILE COMPATIBILITY - Seals all woods including oily varieties like teak and plywood flawlessly.
ULTIMATE WOOD PROTECTION - UV filters penetrate deep to prevent cracking, checking, and varnish peeling.
FLAWLESS FINISH FOUNDATION - Creates a smooth, glossy base that enhances natural wood grain and color.

TotalBoat Wood Sealer is a clear, one-part primer that seals and smooths all wood types—including oily woods—without sanding between coats. It dries quickly, contains UV filters to protect wood fibers, and creates a perfect base for TotalBoat’s 1-part varnishes, ensuring long-lasting, beautiful finishes for both interior and exterior wood surfaces.

Specifications

Recommended Uses For Product	Interior, Exterior
Liquid Volume	1 Quarts
Item Form	Liquid
Global Trade Identification Number	00811932022400
Manufacturer	Jamestown Distributors
UPC	811932022400
Item part number	496580
Package Dimensions	17.91 x 15.19 x 11 cm; 998 g
ASIN	B01M0MZ89O

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TotalBoat Wood Sealer

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