What color is this when cured?

This is white. Hope that helps and thanks for your interest in our marine sealant.

can I use this to repair a crack in my hot tub? Is it safe for continual underwater use?

Yes it is safe for continued underwater use but you will want to make sure it completely cures and dries prior to submerging it. Hope that helps and thanks for your interest in Better Boat

How many Ounces is in a container

Don’t have it in front of me, but it is the size of a normal tube of caulk and will fit into a standard caulk gun.

Will this work around my stainless steel fuel tank filler neck

Yes our marine sealant will absolutely seal and adhere to your stainless steel neck. Thanks so much for your interest in our marine sealant.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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Marine Sealant and Adhesive Waterproof Marine Grade Sealant for Boat and RV - White 10oz

Product ID: 369774608

Details

Brand
Better Boat
Colour
White
Item Form
Paste
Item Weight
10 Ounces
Liquid Volume
10 Fluid

💧100% waterproof & saltwater resistant

☀️UV resistant & flexible under weather stress

🛠️multi-surface adhesion: wood, metal, fiberglass

¥19001

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

⚓ Seal your adventures with confidence—never miss a wave!

FAST CURE PAINTABLE - White curing formula sands smooth and accepts paint for seamless finishes
FLEXIBLE DURABLE BOND - Expands, contracts, and bends without cracking or losing grip
TRUSTED AMERICAN QUALITY - Crafted by boaters for boaters with strict trade-secret standards
HEAVY DUTY WATERPROOF SEAL - Stops leaks above & below waterline with marine-grade strength
MULTI SURFACE COMPATIBILITY - Adheres securely to fiberglass, glass, plastic, metal, and wood

Better Boat’s Marine Sealant is a premium 10oz elastomeric paste designed for professional-grade waterproof sealing and adhesion on boats, RVs, and more. It offers a flexible, UV and saltwater resistant bond that cures fast to a paintable white finish, adhering to multiple surfaces including wood, metal, fiberglass, and plastic. Made in the USA with boater-tested quality, it ensures durable, long-lasting repairs above and below the waterline.

Specifications

ASIN	B07V5QDLR4
Brand Name	Better Boat
Colour	White
Customer Reviews	4.4 4.4 out of 5 stars (364)
Item Form	Paste
Item Weight	10 Ounces
Manufacturer	Better Boat
Manufacturer Part Number	BB-MRSL-WHT
Material Type	Elastomeric
Model	BB-MRSL-WHT
Number of Items	1
Number of Packs	1
Size of liquid in ounces	10 Fluid Ounces
Surface Recommendation	Fiberglass, Glass, Metal, Plastic, Wood
UPC	850009198198
Unit Count	10 Grams
Water Resistance Level	Waterproof

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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¥19001

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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