3M 06580 Marine Adhesive/Sealant Fast Cure 4000 UV, White /

This is the best sealer I have ever used, the self-leveling is a great tool that allows the flow into the cracks, also sets up quickly, I did apply this stuff while it was above70 degrees which I believe helped with the cure time It may cost a little more but trust me it is well worth it for sealing the roof on my car trailer.

This product, like all 3M products is outstanding. I used it to reseal a Pilothouse to deck seam that had developed some leaks. The previous seal/caulk had dried out, shrunk, and cracked. I cut it out and refilled the joint with 4000. I cleaned the area with acetone, masked off beyond the seam and applied 4000 with a caulking gun. The sealant flowed smoothly and filled the joint completely, easily resealing the leaky joint. This product is waterproof so cleanup is messy if you get it where you don’t want it. It does not smooth with a wet, gloved finger, merely smears. Apply enough to fill your joint and no more. Small overages will be “cleaned” up when you remove the masking. I applied the 4000 to a joint almost forty feet in length overall and the cure time is not so quick that I couldn’t easily pull the tape without pulling the caulk. It made an attractive seam and fixed the leak. Unlike 5200, 4000 doesn’t dry/cure so hard that it has to be ground out to remove it, but can be cut out with a knife at some future point if necessary. Unfortunately, this item was shipped by Amazon and though the box was undamaged, the interior bag was never sealed properly and the included nozzle was absent, having escaped through the improperly sealed inner bag before it was ever placed in the box. The fulfillment center never checked that the item was complete, because it was not. The delivery was quick and secure, the filling of the box was not.

es un sellador especializado para uso náutico de muy buena calidad recomendable para embarcaciones de recreo como veleros y yates

This is an excellent product overall. While marketed as a marine sealant, it can be used in other applications where a waterproof, UV resistant seal is needed. I previously used this to seal around mounting brackets for solar panels on an RV roof. Now, I am removing dicor sealant around vents and other openings on the roof and using this instead. Based on my experience with it around the solar panel mounts, it seems to be far superior to dicor and similar products sold as roof sealant. It sets up quickly and acts as both a sealant and an additional bonding agent. I suspect it is strong enough to hold the solar panels by itself (I used VHB tape as well). The only downside I have found is it does not keep its shiny white appearance over time; it gradually turns dull aand yellowish, but as long as you use it where the appearance does not matter it is a great product.

Product is great, easy to apply. Ensure you clean/ dry surfaces well prior to application and tape off where you don't want over spread. 3M Marine Adhesive Sealant 4000 UV comes in thin metal cartridges like tooth paste not a paper tube. If not shipped in proper packaging, the cartridges will be dented, bent or even punctured. I received two wrapped in plastic bag envelopes both packaged in a paper Amazon bag together. ZERO protection. They're not punctured but are bent up. I had to straighten the bottom where the pull tab is to work in my caulk gun.