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โ Seal your legacy with 3Mโs marine-grade powerhouse!
3M Marine Adhesive Sealant 5200 is a one-component, moisture-curing polyurethane designed for permanent, waterproof bonding above and below the waterline. Trusted for over 50 years, it offers a tough yet flexible seal with 700 PSI tensile strength, curing to handling strength in 48 hours. Ideal for wood, gelcoat, and fiberglass, it withstands vibration, swelling, and shock, making it the go-to sealant for professional-grade marine and structural repairs.

| ASIN | B00AZA3DY0 |
| Best Sellers Rank | #26,917 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #92 in Adhesive Caulk |
| Brand | 3M |
| Brand Name | 3M |
| Color | No Color |
| Compatible Material | Wood |
| Container Type | Can |
| Customer Reviews | 4.1 out of 5 stars 470 Reviews |
| Full Cure Time | 48 Hours |
| Included Components | 3M 7000000623 Marine Adhesive Sealant - 10 oz., White |
| Item Form | Oz |
| Item Package Quantity | 1 |
| Item Type Name | 3M 7000000623 Marine Adhesive Sealant - 10 oz., White |
| Item Weight | 14.4 ounces |
| Manufacturer | 3M |
| Material | Plastic |
| Material Type | Plastic |
| Model | 7000000623 |
| Other Special Features of the Product | Strong |
| Part Number | 7000000623 |
| Special Feature | Strong |
| Specific Uses For Product | Fleet and plant maintenance. |
| Tensile Strength | 700 Pounds Per Square Inch |
| UPC | 638060094990 |
| Unit Count | 10.0 Fluid Ounces |
| Volume | 10 Fluid Ounces |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |
R**L
Excellent product
I have all votes my whole life and this product. I have used hundreds of times and itโs always solves any issue. Itโs just amazing how much more than it cost now.
A**R
Good product
Strong bond
P**H
Great product! But terrible handling of the product
3M 5200 may be the best product on the market for sealing boats. If the product doesnโt come undamaged you canโt use it. The product doesnโt come with an applicator tip you canโt use it. Whatโs wrong with Amazon in their shipping? You shipped me a product which was damaged and unusable AND NO APPLICATOR TIP! wasting my time not only can I not get my project done on time I have to get in the car and drive to the UPS store to return your product. Why did you send it to me a damaged tube in the first place with no tip, is this a joke. Maybe one of your fancy robots did it but if an employee did it, maybe they should be retrained! Thank you. Sincerely, for wasting my time. I only hope that the replacement is in usable condition with an applicator tip.
P**A
This does what it says it will do
This product was used to help repair a very old cement statue that sits in a fountain and has a tube running through it to the top of the head to create a nice bubbling and trickling effect. After days or rain, the ground gave way under the heavy fountain and the little girl fell over, breaking the neck. The tube held the head and rest of the body together, but a large amount of cement around the neck crumbled. We applied this as a filler around the head and neck after using a cement adhesive to glue the head back onto the neck and shoulders. In a few days, all was dry, and it rained again--but this sealant held. Being waterproof is a necessity for a fountain statue and cracked fountain bowls.
J**K
Tried and true adhesive sealant for marine use or anywhere you need a permanent mounting
Folks, if you have something that needs to be waterproof and almost permanently attached, this is the stuff! I worked for years in the boat business, and this is a "can't live without it" kind of product. It sets up and cures underwater and is immediately waterproof. The adhesiveness of this product can't be over-stated; don't stick it if you plan to move the item later. I've patched seats. convertible tops, and mounted thru-hull fittings WHILE IN THE WATER. It can be removed but it won't be easy. No, its not cheap but it does exactly what it says, and the peace of mind is well worth the price.
C**S
Nozzles not included
I would have been a lot happier if the nozzles had come with the caulk tubes.
I**V
Good adhesion and feels strong.
This Marine Adhesive Sealant has good adhesion and feels strong. So far did not fell apart under water.
T**.
Great product
Worked great for my boat, definitely worth the price to know itโs sealed correctly.
U**M
Authentique
Authentique produit 3M
Trustpilot
1 day ago
1 month ago