Is this polyester resin

No it is not polyester resin. It is epoxy with a 5 to 1 ratio, and cures extremely hard. Polyester should not be used on a repair below the water line. Epoxy will not allow water to absorb into the repaired area.

can I use this to fix lamination on my RV side walls

Worked great for me rebuilding the wall sandwich (fiberglass, thin ply, foam board,,,) after water delamination.

Can you do inside of bathtub with this?

Good Afternoon, this product cures to a high strength, water resistant finish, so using within a bathtub should be fine. Thank you.

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Description

🛠️ Master your marine repairs with TotalBoat’s slow-cure epoxy kit — because precision never goes out of style.

ALL IN ONE KIT - Includes resin, hardener, and calibrated pumps for perfect mixes every time
PRECISION SLOW CURE - Extended working time for flawless finishes
GENEROUS GALLON SIZE - Ample volume for large projects without constant refills
VERSATILE COMPATIBILITY - Works seamlessly with popular marine epoxy systems
MARINE GRADE RELIABILITY - Formulated by boaters, trusted for durable repairs

TotalBoat 5:1 Epoxy Kit (Gallon, Slow Hardener) is a professional-grade marine epoxy system designed for extended working time and superior bonding. The kit includes epoxy resin, slow hardener, and calibrated mixing pumps, ensuring precise ratios and compatibility with other marine epoxies. Ideal for boaters and DIY enthusiasts tackling fiberglass and repair projects, it delivers durable, clear finishes in a convenient gallon size.

Product Dimensions	25.4 x 20.32 x 38.1 cm; 6.02 kg
Item model number	TB-521KITSB-K
Batteries Required?	No
Batteries included?	No
Material Type(s)	Epoxy Resin
Colour	Clear
ASIN	B00HR8515C

TotalBoat 5:1 Epoxy Kit (Gallon, Slow Hardener)

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