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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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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

Product ID: 461894019

Details

Brand
TotalBoat
Colour
Clear
Item form
Liquid
Material
Epoxy Resin
Special feature
Slow Curing

⏳Slow curing for precision work

⚖️5:1 resin-to-hardener ratio for perfect mix

🛠️Includes calibrated pumps for exact dosing

Description

🛠️ Master your repairs with TotalBoat: precision, power, and pro-level results!

DIY READY KIT - All-in-one gallon kit with resin, hardener, and pumps—ready to tackle your toughest repairs.
PRECISION SLOW CURE - Take your time—no rush, no mess with slow hardener for flawless finishes.
ROCK SOLID DURABILITY - Creates ultra-strong bonds that outperform wood fibers—built to last and impress.
PERFECT MIX EVERY TIME - Calibrated 5:1 pumps ensure consistent, reliable epoxy blends—no guesswork.
VERSATILE MARINE GRADE - Compatible with top marine epoxies, engineered by boaters for boaters.

TotalBoat 5:1 Epoxy Kit (Gallon, Slow Hardener) is a professional-grade marine epoxy system designed for durable repairs and fiberglass projects. Featuring a precise 5:1 resin-to-hardener ratio with calibrated pumps, it offers slow curing for meticulous work and compatibility with other marine epoxies. Developed by boaters, this kit delivers strong, lasting bonds ideal for complex DIY fixes and refinishing tasks.

Specifications

ASIN	B00HR8515C
Brand	TotalBoat
Colour	Clear
Compatible Material	Fibreglass
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (887)
Global Trade Identification Number	00811932021021
Item Form	Liquid
Item Package Quantity	1
Item Volume	1 Gallons
Manufacturer	TotalBoat
Manufacturer Part Number	TB-521KITSB-K
Material	Epoxy Resin
Model Number	TB-521KITSB-K
Number of Pieces	1
Other Special Features of the Product	Slow Curing
UPC	811932021021
Unit Count	1.0 count
Water Resistance Level	Water Resistant

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