Life-Calk® Sealant 5.2 fl. oz. Half Cartridge White


A long lasting, permanently flexible marine polysulfide sealant which can be sanded, painted***, and used above and below the waterline. Tack-free in 1 to 3 days, excellent resistance to teak oils, gasoline, and diesel fuel. Ideal for teak decks, to bed deck and hull hardware, seal thru-hull fittings, and underwater seams. Will bond to fiberglass, wood, metal, glass, and itself. Cures to a firm flexible rubber seal with excellent waterproofing and adhesion qualities. Can be applied underwater for emergency repairs. Can be applied to damp surfaces.

*** Not compatible with all paints, Sikkens, Cetol, Deks, Olje.

SKU: 1372 Category:


If you do your own boat repairs and maintenance, having a reliable caulk on hand is essential. Life-Calk Polysulfide Sealant from BoatLIFE is a leading product in this market, and for good reason. With long-lasting performance and the flexibility necessary to fill small nooks and crannies on your vessel, this moisture cure caulk will not disappoint. Order your cartridge today and get to work!

Key Benefits

Using a sealant like Life-Calk can keep water out of places on your boat where it is not supposed to be. You can seal up numerous areas, such as thru-hull fittings, underwater seams, hull hardware, and more. Here are just a few reasons to choose Life-Calk:

  • Industry-leading caulk and sealant
  • Long-lasting and permanently flexible
  • Can be sanded and painted (check for compatibility with specific paints)
  • Can be used above and below the waterline
  • Tack-free in 1-3 days
  • Bonds to fiberglass, wood, metal, glass, and itself
  • Excellent resistance to teak oils, gasoline, and diesel fuel
How to Apply Caulk on Your Boat

With a little practice, anyone can learn to apply a flexible underwater sealant properly. To get started on the right track, consider these tips:

  • Preparation is key. The most important part of the whole job comes before you even open up the caulking tube. You need to prepare the surfaces in question by cleaning them thoroughly and letting them dry (if necessary).
  • Practice your timing. As you squeeze caulk out onto the boat’s surface, you need to keep it moving at just the right speed to form a steady bead. Consider practicing your technique on a scrap piece of wood before doing the actual repairs on your boat.
  • Use only the best products. Know that you will get only the highest quality marine grade products when you shop with BoatLIFE! Our Life-Calk sealant, along with all of our products, are made from only high-quality ingredients at our manufacturing facility in North Charleston, South Carolina.
Order Today!

Putting off boat maintenance will only lead to more work later. To avoid a costly repair job down the road, periodic maintenance is best. Get started on your sealant project by ordering Life-Calk and any other supplies you need from BoatLIFE today.