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Item #:
593292
3M 6504 Marine Adhesive Sealant, Black, 10 oz.
85% of respondents would recommend this to a friend
Item #:
593292
NZD 91
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Imported from USA store
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Order now and get it around Thursday, September 10
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This high-performance polyurethane adhesive/sealant becomes tack-free in 48 hours, cures completely in 5-7 days.
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What Stands Out
Marine-Grade Durability
Designed specifically for marine applications, this sealant resists water, UV light, and temperature extremes, ensuring long-lasting performance in harsh environments.
Versatile Applications
Ideal for bonding and sealing a variety of surfaces including wood, fiberglass, and metal, making it a top choice for boat repairs and construction.
Easy Application
The 10 oz tube ensures precise application, while its excellent adhesion properties allow for quick setup, reducing the need for complex tools and saving time.
Product Details
- Easy to apply with a manual caulking gun
- Remains workable with trowel or spatula up to four hours after application
- Won't sag or flow in vertical or horizontal seams
- Effectively absorbs stress caused by shock, vibration, swelling, and shrinking
- Suitable for bonding and sealing fiberglass, wood, portholes, deck fittings, motors on fiberglass transoms, hull seams, center board trunk joints, etc
- Becomes tack-free in 48 hours, cures completely in 5-7 days, retaining strength above or below the water line, with excellent resistance to weathering and saltwater
| Specific Uses For Product | Marine |
| Item Form | Paste |
| Other Special Features of the Product | Stress Absorbing, Weather and Saltwater Resistant |
| Container Type | Cartridge |
| Full Cure Time | 5 Days |
| Water Resistance Level | Waterproof |
| Tensile Strength | 705 Pounds Per Square Inch (1790.7 cm) |
| Viscosity Level | Medium to High |
| Compatible Material | Fiberglass, Wood |
| Item Package Quantity | 1 |
| Volume | 295.74 Milliliters |
| Material Type | Polyurethane,Wood |
| Color | Black |
| Brand Name | 3M |
| Model | 6504 |
| Unit Count | 10.0 Fluid Ounces |
| UPC | 051135065020 051135065044 |
| Number of Pieces | 12 |
| Manufacturer | 3M |
| Part Number | FBA_6502-CQ |
| Item Weight | 14.88 ounces (421.85 grams) |
| Brand | 3M |
| Material | Polyurethane,Wood |
| Special Feature | Stress Absorbing, Weather and Saltwater Resistant |
Who Should Buy?
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Marine Applications
Ideal for boat owners needing waterproof seals for hulls, decks, and fittings to withstand harsh marine environments.
-
Repair Enthusiasts
Perfect for DIYers looking to repair or seal various surfaces, offering durability and resistance to environmental elements.
-
Professional Users
Beneficial for contractors or professionals in the marine industry requiring a reliable sealant for optimal performance.
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Indoor Use
Not suited for indoor sealing applications, as it is specifically designed for marine and outdoor environments.
Product Description
3M 6504 Marine Adhesive Sealant, Black, 10 oz.
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is 3M 6504 Marine Adhesive Sealant used for?
Answer: 3M 6504 Marine Adhesive Sealant is designed for sealing and bonding applications in marine environments. Its strong, flexible properties make it ideal for boat repairs, caulking, and creating leak-proof seals. The product is resistant to water and extreme temperatures, ensuring long-lasting adhesion. For example, use it to seal joints around windows, hatches, and through-hulls in boats, providing a reliable barrier against water infiltration. -
Question:
What type of surfaces can I apply 3M 6504 Sealant on?
Answer: The 3M 6504 Marine Adhesive Sealant can be applied to a variety of surfaces, including fiberglass, wood, metal, and plastic. This versatility makes it suitable for diverse applications from repair jobs to construction on boats. For instance, it works exceptionally well for sealing the edges of fiberglass panels in watercraft, ensuring a secure and waterproof fit. -
Question:
How does 3M 6504 withstand harsh marine environments?
Answer: The formulation of 3M 6504 Marine Adhesive Sealant is specifically engineered to withstand harsh marine conditions. It offers excellent resistance to moisture, UV rays, and temperature extremes. This durability is crucial for maintaining the integrity of marine vessels exposed to corrosive saltwater and fluctuating weather. For example, using this sealant can protect critical hull joints from deterioration over time. -
Question:
Is 3M 6504 paintable or stainable?
Answer: Yes, 3M 6504 Marine Adhesive Sealant can be painted after it has cured fully. This allows you to maintain a clean aesthetic on your project without compromising the sealant's performance. To achieve good adhesion, it’s recommended to use a compatible paint specifically designed for marine applications. This feature is beneficial if you want to match your repair work to the boat's overall color theme. -
Question:
How should I store 3M 6504 Marine Adhesive Sealant?
Answer: It's best to store the 3M 6504 Marine Adhesive Sealant in a cool, dry place, with the cap tightly closed to prevent curing. Extreme temperatures can affect the sealant's performance, so keeping it in a stable environment is key. Proper storage extends the product's shelf life, allowing you to use it for future projects when needed. -
Question:
How long does it take for 3M 6504 to cure?
Answer: The curing time for 3M 6504 Marine Adhesive Sealant typically ranges from 24 to 48 hours depending on environmental conditions such as temperature and humidity. Full adhesion strength is attained once the sealant cures completely. For scenarios where structural bonds are crucial, it's advisable to allow adequate curing time before applying pressure or water exposure. -
Question:
Can 3M 6504 be used underwater?
Answer: 3M 6504 Marine Adhesive Sealant can be applied underwater, however, for optimal results, it's suggested to apply it above the waterline when possible. If used underwater, ensure the surfaces are clean and free of contaminants to promote a good bond. This capability is particularly useful for urgent repairs where a dry workspace is not available. -
Question:
Is 3M 6504 safe to use?
Answer: Yes, when used as directed, 3M 6504 Marine Adhesive Sealant is safe for most applications. It’s important to use it in well-ventilated areas and follow safety guidelines, such as wearing gloves and goggles, to minimize exposure. This is especially relevant during installation to ensure safety while working with strong adhesives. -
Question:
What colors are available for 3M 6504 Marine Adhesive Sealant?
Answer: 3M 6504 Marine Adhesive Sealant is primarily available in black, which is ideal for concealing seams and imperfections on marine surfaces. The black color also has the added benefit of blending well with dark-colored finishes and boat materials. Selecting the right color enhances the visual appeal of your repair work while providing strong sealing performance. -
Question:
Where can I buy 3M 6504 Marine Adhesive Sealant, Black, 10 oz?
Answer: You can purchase 3M 6504 Marine Adhesive Sealant, Black, 10 oz from Ubuy. Ubuy offers a convenient online shopping platform that caters to customers in New Zealand, ensuring that you can easily access this essential marine product for all your sealing and bonding needs.
3M Joint Sealants Editorial Review
If you're looking for a marine adhesive sealant, the 3M 6504 Marine Adhesive Sealant in black is a great option to Consider. Customers have reported success with sealing leaks in their boats and duck boats with ease using this sealant. One customer even reported using it on their fiberglass boat with multiple holes, and the sealant held up even while traveling at high speeds on the lake. Another customer recommends this sealant for any sealing job, as it outperforms even the best silicone caulk or RV roof sealants. Overall, if you need a reliable marine adhesive sealant, the 3M 6504 Marine Adhesive Sealant is definitely worth trying out.
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Pros
- Effective at sealing leaks in boats and duck boats
- Held up while traveling at high speeds on water
- Outperforms silicone caulk and RV roof sealants
- Able to be painted
Platform Trust & Buyer Confidence
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Ranee
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“Paint ordered from USA, u buy got the product to me in New Zealand in approx a week”
22 July 2026 · via Trustpilot
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“very speedy delivery,tracking info was superb-best experikence ever!!!”
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Nicholas
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“Love what I received and ordered found that usa clothes are more better quality and look better than the same clothes in my country but are harder to find here recommend ubuy 100%”
22 June 2026 · via Trustpilot
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Dneah
Verified buyer
“Product came earlier than expected (shipped from US to NZ), in about 3 weeks. No damages and product was exactly as advertised!”
15-Jul-26 · via Trustpilot
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Tania
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“Easy to order, easy to track and the product is great to use. Also, the person-to-person (not automated) phone call I got to confirm that I'd received the item was wonderful ??”
11-Jul-26 · via Trustpilot
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NZD 91
Order now and get it around Thursday, September 10
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Features & Benefits
- Easy to apply with manual caulking gun
- Doesn't sag or flow in vertical or horizontal seams
- Absorbs stress caused by shock, vibration, swelling, and shrinking
- Strong seal above or below waterline
- Excellent resistance to weathering and saltwater
- Ideal for various bonding and sealing jobs
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