3m 05205 3 Oz White Marine Adhesive Sealant

I used this to adhere and seal four underwater lights on the fiberglass hull of my sailboat. The boat's been in the water for months now and not a single problem. Good stuff.

Was unable to use it product had to be old one squeeze of tube and it split a partI have used this product before with no problemsIf needed again try to buy local so you can get a refund easier than going back through Amazon I would had to put in special container to send back not worth the hassle

Seals Well. Used on RV vertical surfaces. Storage clips, rear lights, & outdoor 'patio' light. Pretty stiff paste. Cures quick enuf, but allows plenty of time 2 get job done. Great 4 vertical. Small tube 4 small jobs. Clean up- mineral spirits or paint thinner works easy.

Don’t leave the shore without it 🤜🤛

This arrived on time as usual, good job amazon. It also arrived already cured an inch or so deep into the nozzle. So I had to cut the back of the tube in order to use my sealant. It did not seal my waders, though I cannot be too upset as it is not meant to seal waders. Really wish i could reuse this in the future but it is a one time use due to the nozzle being sealed.

Product is great! Getting the tube to work properly...not so great! The nozzle came unscrewed every time I put the smallest amount of pressure on the top 😕

This 3M 4000 adhesive is not black, though the product description states it is

Ordered black, got whiteOrdered black again, got white again