Teakdecking Systems - 10oz Marine Caulk Cartridge, White - Premium Quality - SIS440 - for Teak Deck Seams - Provides First Class Appearance - UV & Chemical Resistant, Non-Corrosive

I live and cruise on a sailboat. Caulking is a fact of life for mariners of all stripes, and there are a variety of types of caulk for different purposes. This one isn't designed as a glue; its tenacity is merely 'good' - but it WILL do all the waterproofing of joints you can imagine, very well. But from an applicator's point of view, it's nirvana. It's water-soluble. That means cleanup is a wipe-off for most stuff, and a water-wet rag/paper towel for any unwanted smears you might leave behind. It's repair-friendly. There were several cases where we had to replace a deck fitting on our toerail - the thing which goes all around the perimeter of the deck. The cured caulk will cut readily with a utility knife; I used a sloped-pointed-ended cut, kind of like < > this shape. Out comes the previous fitting. An extended snap-off blade easily removes the caulk from where the fitting sat - or removes the fitting, too, as it remains soft and pliable despite extended exposure to sun and salt water seas. In goes the new fitting, using the same level of caulking as before. With a caulk tool (a small, handled, 3-sizes-rubber-triangle-ended spreader), these replacements easily filled into those point-cuts above. A week later, you have to hunt to find them. It's our go-to caulk for anything needed to keep water out, but not need gluing to keep in place. You'll love it.

We had a leak in our boat, and this held it for us

The caulk is very good. Been using it for years. However the cartridge isn’t good. The internal piston doesn’t seal well and caulk is pushed backwards as well - under a very low pressure. They need to learn from 3M on a proper cartridge use. The material is very expensive and the poor cartridge created a significant waste and mess to clean. Moved to the large 20oz. sausage format that naturally works fine.

Prrouct recieved is over 10 years beyond best used date, unusable, 2nd time this happened

What can one say? It did what it was supposed to do.