Search  for anything...
3M

3M Marine Adhesive Sealant 5200 (05203) Permanent Bonding and Sealing for Boats and RVs Above and Below the Waterline Waterproof Repair, White, 3 fl oz Tube

    • Based on 8,939 reviews
Condition: New
Checking for product changes
$17.98 Why this price?
Save $21.01 was $38.99

Buy Now, Pay Later

As low as $4 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Apr 16 – Apr 27
Order within 23 hours and 30 minutes
Available payment plans shown during checkout

Recently Viewed

Color: White


Size: 3 fl oz


Pattern Name: Adhesive Sealant


Features

  • USE WHAT THE PROS USE Extremely strong adhesive sealant retains strength above or below waterline
  • BONDS PERMANENTLY Ideal for sealing, bonding and attaching on the interiors of boats and RVs, or on exteriors below the waterline and where shielded from the sun
  • LONG LASTING FORMULA Tough polyurethane polymer resists weathering and salt water
  • WONT CRACK OR PEEL Stays flexible, retaining strong bonds even during vibration, structural movement or shock
  • EASY TO APPLY Adhesive sealant requires no mixing, cures completely in 5-7 days
  • For industrial/occupational use only. Not for consumer sale or use

Description

3M Marine Adhesive Sealant 5200 is a tough, flexible polyurethane for permanent bonding and sealing your RV, boat or other watercraft. It is ideal for use on wood, gelcoat, fiberglass, metal and more. It is recommended for interiors, below the waterline and any other places that are shielded from sunlight. It applies right from the container – no mixing is required. It becomes tack-free in 48 hours, and cures to form a firm, flexible, waterproof seal on joints and boat hardware. Far more than a marine caulk, tough, flexible Marine Adhesive 5200 dissipates stress caused by vibration and shock, and won’t crack under dynamic force. It resists saltwater, wind, weather and temperature extremes for long periods of worry-free enjoyment on the water. In fact, for more than 50 years, 3M Marine Adhesive Sealant 5200 has been used and trusted as a marine sealant by professionals in some of the most demanding conditions on earth.

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 2 x 5 x 9 inches; 4.94 ounces


Item model number ‏ : ‎ 5203


Department ‏ : ‎ unisex-adult


National Stock Number ‏ : ‎ 8030-01-549-4478


Date First Available ‏ : ‎ June 15, 2006


Manufacturer ‏ : ‎ 3M


Country of Origin ‏ : ‎ USA


Best Sellers Rank: #1,081 in Automotive (See Top 100 in Automotive) #83 in Body Repair & Restoration Adhesives


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Apr 16 – Apr 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Expensive but did the job on my pool
Color: White Size: 10 fl oz Pattern Name: Adhesive Sealant
I used this to seal under the stone around the periphery of my pool, and it worked great for that purpose. I liked that it was also sealed on the non tip end to prevent premature drying of the tube.
Reviewed in the United States on January 6, 2025 by braxtonw
    • Excellent bond of wood to fiberglass
Color: White Size: 10 fl oz Pattern Name: Adhesive Sealant
I'm using this to put a ceiling in a fiberglass top RV, and I needed a way to bond the wood supports to the ceiling and side of the van. I used this adhesive in combination with deck screws to hold the ceiling supports up to the roof, and the results were so good I used the adhesive by itself to put my supports on the side of the van. After a day, those were on pretty solid, but I'm letting them cure a full 7 days before building the van out further. I chose this adhesive because it has greater flexibility than epoxy which is an important consideration when you're banging down dirt roads in an RV. And while the contact patch I'm securing to the fiberglass is not all that great and the weight it will carry is minimal, I figure all other things being equal it was better to go with the more flexible option. I only used a small amount on the ceiling, and my side walls didn't go up for another week, so I put the tub in a plastic bag in order to keep the adhesive from setting. That worked like a champ, and I was able to save about 20 bucks by not having to toss the majority of the adhesive away. ... show more
Reviewed in the United States on September 15, 2022 by Kevin Stillwagon
    • When they say permanent, they mean permanent!
Color: Black Size: 10 fl oz Pattern Name: Adhesive Sealant
This adhesive is crazy. I wouldn't use it on anything you do not want to be PERMANENT. We replaced our propane fridge in the RV with a Residential fridge. I used this adhesive to glue metal L brackets to the top, and small Wood spacers on the bottom. It took forever to cure (7 days..) but it is NOT coming off. In retrospect, I think I should have bought the "fast cure" version. ... show more
Reviewed in the United States on March 5, 2025 by Bianca
    • Good sealant.
Color: White Size: 10 fl oz Pattern Name: Adhesive Sealant
I bought this to seal my swim deck ladder to the swim deck after making repairs. I have also used it when installing the bow roller. Works good, seals and bonds well. As stated by others, the tube is off a bit on size. The first time you use it, you may not notice. But if you are like me and save your tubes for future use, the next time, the tube will begin to torque to the side when squeezing out. I save my tubes by cleaning the tips and wrapping them in plastic wrap really good. Yes, it works, but it sometimes only slows the curing of the product. In this sealants case, it worked OK, but I did have to remove a few inches of sealant to get to the softer stuff. This sealant wants to cure, so keep that in mind. I have reused silicon years later wrapping them, but this sealant isn't going to last long for additional uses. I recommend this sealant and only this sealant for keeping the water out of your boat. Dont go the cheap way on this stuff. Do your research. ... show more
Reviewed in the United States on December 12, 2020 by Craig
    • The best you can buy.
Color: Black Size: 10 fl oz Pattern Name: Adhesive Sealant
I use this stuff to apply a rubber base onto wooden instruments. Bonding to rubber is not very easy, but this stuff is great. It is extremely tacky and firm right out of the tube. I keep mine in the fridge to preserve the unused contents, but can also go in the freezer, and is immediately usable even icy cold. CONS: it takes several days to cure hard (for shaping and sanding) but will skin in 1-2 days. Seriously tacky! There is a fast cure variety but it’s only available in white. I need the black stuff. JB wood also has a similar white product. This is seriously on another level. ... show more
Reviewed in the United States on July 8, 2024 by Djembe Drum
    • Good product
Color: Tan Size: 10 fl oz Pattern Name: Adhesive Sealant
Good product
Reviewed in the United States on December 31, 2024 by Jeff Augustin
    • The Stuff!
Color: White Size: 10 fl oz Pattern Name: Adhesive Sealant
Use for transom plate on jet ski..worked.great .zero leaks..But is permanent....takes HEAT like crasy to remove..fyi..4200 is what you need if you want to ever remove anything..this is what you want for Permanent things
Reviewed in the United States on October 11, 2024 by james hawkins
    • And I might be wrong but it seems the silicone pads on the goggles and rubber wetsuit material would bond (that is to say "melt"
Color: Black Size: 3 fl oz Pattern Name: Adhesive Sealant
Unfortunately, I had to rate this with something.. and there are no negative numbers. I was dumfounded that this product demonstrated 100% failure to do anything it is advertised to do..even for the simplest of use. It failed as an adhesive... and where it would NOT bond it failed to seal. I swim 2.5 - 3 miles everyday and am in the water for anywhere from 80 to 110 minutes non-stop. I customize the swimming goggles I use because I can't find goggles that won't put ring marks on my boney eye sockets and over that kind of time they begin to really hurt. I glue custom cut pieces of an old wet suit to the soft material around the goggle lenses. I read many reviews of this product and bought it because I thought I had found a winner and I'd finally found something that would last... but that was not the case. Within one week the bond failed completely. Now maybe the glue isn't made to withstand chlorine, I don't know.. it wasn't indicated and if it is a marine sealant who's to say someone wouldn't be using it around a pool? It only makes sense it could be. And I might be wrong but it seems the silicone pads on the goggles and rubber wetsuit material would bond (that is to say "melt" together) but what I got was a nice clean surface on both the pieces when they came apart. I put the glue on both surfaces and waited over an hour for it to get sticky (otherwise it was like water), so maybe it doesn't bond to itself. Seems every glue I've ever used recommends doing this. I weighted the bond down overnight and because of the "dry" time, did not get them wet for over a week. I can't imagine using this useless stuff on a boat, or any type of motor, or condition where vibration would be constant. And the kind of set up time required the boat would likely sink if I'm trying to seal water out. I'm glad other people got some satisfaction from it, I sure didn't for that piddly little use...and I'd be willing to bet down the road they will all be doing it again. It took well over a week for the glue to become non-sticky. All in all.. I would not recommend anyone buying this stuff for anything unless you just like the smell of it. Sorry 3m but... best go back to the drawing board.. or put some information together about how, where, what.. maybe "your" definition of marine...directions for application and something on the literature other than the fear based stuff about getting it in the eyes or swallowing it. I normally would not say anything and just throw the stuff away but it was such utter failure...maybe I can save someone the trouble and time I went through. ... show more
Reviewed in the United States on November 5, 2014 by anonymous

Can't find a product?

Find it on Amazon first, then paste the link below.