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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Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp

Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp

Product ID: 469106591

Details

Brand
Better Boat
Color
Black
Item Form
Liquid
Item Weight
10 ounces
Liquid Volume
295.74 ml

💧100% waterproof & saltwater resistant

🌡️High-temp flexible elastomeric bond

🛠️Multi-surface adhesion: fiberglass, metal, wood

189.59 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚓ Seal the deal with marine-grade strength and flexibility!

UV SALTWATER SHIELD - One-part sealant resists sun, rain, and saltwater for a permanent, tough bond that cures fast and sands smooth.
MADE BY BOATERS FOR BOATERS - Crafted in the USA with premium quality standards trusted by marine professionals.
UNMATCHED WATERPROOF DURABILITY - Seals leaks above & below waterline with a heavy-duty elastomeric formula that flexes with weather.
VERSATILE SURFACE COMPATIBILITY - Adheres securely to fiberglass, glass, plastic, metal, and wood—perfect for boats, RVs, pools, and autos.
FAST CLEAN AND PAINTABLE FINISH - Cures black, allowing sanding and painting unlike silicone—ideal for flawless, long-lasting repairs.

Better Boat’s Marine Sealant and Adhesive is a premium, waterproof, elastomeric caulk designed for high-temp, above and below waterline repairs. It forms a flexible, UV and saltwater resistant bond on multiple surfaces including fiberglass, metal, and wood. Made in the USA, this fast-curing, paintable sealant is trusted by boaters and professionals for durable, long-lasting marine and automotive applications.

Specifications

Asin	B09T8HKH61
Best Sellers Rank	#82,005 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #135 in Silicone Caulk
Brand Name	Better Boat
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (739) 4.3 out of 5 stars
Item Form	Liquid
Item Highlight	Water Sealant for Boat, Auto, RV, Without Silicone, 1 Tube, Black, 10 oz
Item Weight	10 ounces
Liquid Volume	295.74 ml
Manufacturer	Better Boat
Material Type	Elastomeric
Model	BB-MRSL-BLK2
Number Of Items	1
Number Of Packs	1
Part Number	BB-MRSL-BLK2
Surface Recommendation	Door, Gutter, Pipe, Sink, Tile, Tub, Walls, Window
Unit Count	10 Ounce
Upc	850033414172
Water Resistance Level	Waterproof

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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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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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189.59 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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