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Item #:
221929473
3M Marine Grade Silicone Sealant, Clear, 304 mL Cartridge
85% of respondents would recommend this to a friend
Item #:
221929473
GHS 1004
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Developed specifically as a boat sealant - stays tough and flexible for a wide range of uses above the waterline
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What Stands Out
Waterline Performance
Designed specifically for above-waterline applications, ensuring maximum durability and superior water resistance for boats and RVs.
Versatile Use
Ideal for interior and exterior sealing, making it suitable for a wide range of marine and recreational vehicle repairs and maintenance.
Ease of Application
Comes in a convenient 3 fl oz tube, allowing for precise application and mess-free use, ensuring effective results with minimal waste.
Product Details
- Specifically developed as a marine sealant for above the waterline use
- Versatile application on various surfaces such as metal, glass, paint, fiberglass, woods, plastics, and rubbers
- Easy to apply from the container with no mixing required, and cures in as little as 24 hours
- Maintains clarity without yellowing over time, keeping watercraft looking sharp
- Designed to endure harsh marine environments, ensuring reliable sealing performance
- Part of a broad range of adhesive sealants uniquely formulated for the marine market
| Brand Name | 3M |
| UPC | 051135080290 |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| Item Highlight | For above the waterline interior/exterior sealing on RVs, boats and more |
| Global Trade Identification Number | 00051135080290 |
| Number of Items | 1 |
| Included Components | PN08029 |
| Item Type Name | Marine Grade Silicone Sealant (08029) u2013 For Boats and RVs - Clear u2013 1/10 Gallon Cartridge |
| Manufacturer | 3M |
| Model | 08029 |
| Part Number | 051135080290 |
| Item Weight | 8 ounces (226.8 grams) |
| Item Dimensions | 2 x 2 x 12 inches (5.1 x 5.1 x 30.5 cm) |
| Water Resistance Level | Water Resistant |
| Item Form | Liquid |
| Compatible Material | Glass, Metal, Plastic, Wood |
| Style Name | 10.3 fl oz |
| Color | Clear |
| Surface Recommendation | Floors,Walls,Wood |
| Material Type | Specialized silicone or synthetic rubber compound |
| Material | Specialized silicone or synthetic rubber compound |
| Brand | 3M |
| Style | 10.3 fl oz |
| Item dimensions L x W x H | 2 x 2 x 12 inches (5.1 x 5.1 x 30.5 cm) |
Who Should Buy?
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Boat Owners
Ideal for sealing gaps and providing water resistance on boats, ensuring durability and maintenance.
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RV Enthusiasts
Suitable for sealing joints and areas above the waterline in RVs, protecting against leaks and environmental damage.
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DIY Projects
Great for various home improvement and repair tasks, offering reliable adhesion and flexibility for multiple surfaces.
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Underwater Use
Not suitable for sealing areas submerged in water or subjected to consistent water pressure.
Product Description
3M Marine Grade Silicone Sealant, Clear, 304 mL Cartridge
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is 3M Marine Grade Silicone Sealant used for?
Answer: 3M Marine Grade Silicone Sealant is specifically designed for sealing above the waterline on boats and RVs. Its long-lasting durability and flexibility make it ideal for both interior and exterior applications, such as sealing joints and gaps. Whether you're fixing a leaky faucet on your RV or securing seams in your boat, this silicone sealant provides a reliable water-tight seal that withstands harsh marine environments and extreme weather conditions. -
Question:
How do I apply 3M Marine Grade Silicone Sealant?
Answer: To apply 3M Marine Grade Silicone Sealant, first, ensure that the surface is clean, dry, and free of old sealant. Use a caulking gun to extrude the silicone along the joint you wish to seal. Smooth the bead with a finger or a smoothing tool for a neat finish. This sealant cures quickly and can be exposed to water shortly after application, making it perfect for urgent repairs on boats and RVs during trips. -
Question:
Is 3M Marine Grade Silicone Sealant safe for use on all surfaces?
Answer: Yes, 3M Marine Grade Silicone Sealant is compatible with various surfaces, including fiberglass, metal, and wood, making it a versatile choice for marine and RV applications. Before applying, check if the surface is clean and appropriately prepped for optimal adhesion. This feature ensures long-lasting seals that resist water, UV rays, and extreme temperatures. -
Question:
Is 3M Marine Grade Silicone Sealant paintable?
Answer: No, 3M Marine Grade Silicone Sealant is not paintable. It maintains its clear finish post-application, providing a clean look that blends well with most surfaces. This characteristic is particularly beneficial for maintaining aesthetics on boats and RVs, as any additional coating may lead to peeling and reduced adhesion over time. -
Question:
Can I use 3M Marine Grade Silicone Sealant underwater?
Answer: 3M Marine Grade Silicone Sealant is not designed for underwater use. It is suitable for above-waterline applications, where it can effectively seal and protect against moisture without being submerged. If you need to address underwater leaks, consider alternative marine-grade products specifically designed for that purpose. -
Question:
What temperature range can 3M Marine Grade Silicone Sealant withstand?
Answer: 3M Marine Grade Silicone Sealant is designed to withstand a wide temperature range from -50°F to 150°F (-45°C to 65°C), making it suitable for both hot and cold climates. This ability ensures that the seal remains effective regardless of environmental changes, ensuring your RV and boat remain protected year-round. -
Question:
How long does it take for 3M Marine Grade Silicone Sealant to cure?
Answer: The curing time for 3M Marine Grade Silicone Sealant varies depending on environmental conditions, but it typically sets within 24 hours. Full cure and maximum adhesion are reached after about 72 hours. This information is crucial for planning repairs, especially in boating and RV preparation, ensuring that the seal is secure before exposure to water. -
Question:
What is the shelf life of 3M Marine Grade Silicone Sealant?
Answer: 3M Marine Grade Silicone Sealant has a shelf life of up to 24 months when stored in a cool, dry place. To maximize its longevity, ensure the cap is properly sealed after each use to prevent curing in the tube. This shelf life allows you to keep this essential repair tool on hand for routine maintenance on your boat or RV. -
Question:
Can 3M Marine Grade Silicone Sealant be used on automotive projects?
Answer: While 3M Marine Grade Silicone Sealant is specifically formulated for marine and RV applications, it can also be applied to certain automotive projects where waterproof sealing is needed. For example, it can seal gaps around headlights or taillights. However, always check compatibility with the specific materials before use. -
Question:
Where can I buy 3M Marine Grade Silicone Sealant in Ghana?
Answer: You can buy 3M Marine Grade Silicone Sealant from online retailers such as Ubuy, which offers a variety of products suitable for marine and RV maintenance. Ubuy provides a convenient platform for purchasing this sealant, ensuring it is readily available for all your sealing needs.
3M Silicone Adhesives Editorial Review
3M Marine Grade Silicone Sealant, PN08017, White, 3 oz Tube is a reliable choice for above the waterline interior and exterior sealing on RVs, boats, and more. This waterproof paste has garnered attention for its effectiveness, as noted in several reviews where users praised its ability to prevent leaks under sun and water exposure. The cap design helps keep the silicone fresh for multiple uses, and while some users found the dispenser cap's threads could be finicky, the overall ease of application and cleanup has made it a favorite among DIY enthusiasts and marine applicants. The strong adhesion capability further solidifies its place as a trusted product for marine and RV sealing tasks.
Customer Reviews & Ratings
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Pros
- Excellent waterproof sealing performance
- Cap prevents curing between uses
- Easy to apply and clean up
- Strong adherence above and below waterline
- Trusted brand with quality assurance
Cons
- Dispenser cap threads can be finicky if pushed sideways
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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GHS 1004
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