The strongest submersible sealants we offer, these combine the mechanical strength of an adhesive with excellent sealing properties and high flexibility. They’re marine grade, so they stand up to water, corrosion from salt spray, mildew, and UV light. Sealants are non-sagging, so they won't drip from vertical and overhead surfaces.

Elongation indicates flexibility—the higher the values are, the more sealants can stretch. These sealants are good for use between dissimilar materials and in environments with wide temperature fluctuation. For high-wear applications, choose a harder sealant for the most abrasion resistance.

Certificates with a traceable lot number and product shelf life are available for these products. Download certificates from ACTIVITY after your order ships.

Apply these sealants in cold temperatures, on wet surfaces, and even through running water. They are structural sealants that combine the mechanical strength of an adhesive with excellent sealing properties and high flexibility. Sealants are non-sagging, so they won't drip from vertical and overhead surfaces.

Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are good for use between dissimilar materials and in environments with wide temperature fluctuation.

Apply these sealants on wet surfaces and in cold temperatures. They’re non-sagging, so they won't drip from vertical and overhead surfaces.

Sealants with 1,000% elongation can be applied through running water.

Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. Sealants that are good for joining dissimilar materials also work well in environments with wide temperature fluctuation.

Sealants that cannot be sold to the regions listed are restricted by local chemical regulations, including limits on VOC (volatile organic compounds).

Clear enough to read through, this UV-resistant sealant allows optimal light transmission for use with solar cells and fiber optics. Apply it in cold temperatures, on wet surfaces, and even through running water. The sealant is non-sagging, so it won't drip from vertical and overhead surfaces. It cannot be sold to the regions listed due to local regulatory limits on VOC (volatile organic compounds).

Elongation indicates flexibility—the higher the value is, the more a sealant can stretch. This sealant is good for use between dissimilar materials and in environments with wide temperature fluctuation.

Apply these sealants on wet surfaces and in cold temperatures. Thinner than non-sagging sealants, these flow easily into cracks and have a smooth finish.

Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain.

Fix roof leaks in cold and wet conditions. These sealants can even be applied underwater. They're non-sagging, so they won't drip from vertical and overhead surfaces. They are good for use in environments with wide temperature fluctuation.

Elongation indicates flexibility—the higher the value is, the more joint movement a sealant can sustain.

Apply these sealants on wet surfaces and in cold temperatures. They're non-sagging, so they won't drip from vertical and overhead surfaces.

Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.

Even when used under water, these adhesives maintain their strength. The most weather- and chemical-resistant structural adhesives, epoxies tend to work especially well on metals.

The size listed is the combined total of the two parts. For putty adhesives, slice off the required amount, then knead it together to form a moldable adhesive.

WaterWeld and 11800, as well as one-time-use packets, can be applied to wet surfaces or under water.

When concrete is saturated with or submerged in water, use these epoxies to permanently set threaded rods, studs, and rebar. They form a weather-resistant chemical bond that seals out moisture and resists vibration and dynamic loads better than mechanical anchors. Warning: Allowable pull-out strength is 25% of ultimate values or less, as required by building authorities. Use a mixer nozzle and dispensing gun (dispensing gun sold separately) to simultaneously mix and dispense adhesive.

Mix these two-part epoxy surface fillers to create a strong repair in wet environments or underwater. Use them to repair cracked, worn, and damaged surfaces. Size listed is the combined total of the two parts.

Putty fillers come in a stick with a resin on the outside and a hardener on the inside. Cut the desired amount from the sticks, knead to a uniform color to mix, and press into place. NSF/ANSI 61 surface fillers meet safety standards for use with drinking water.

Paste fillers resist alkalies, solvents, gasoline, and oil.

Everything you need to repair cracked, worn, and damaged surfaces—even underwater.

Waterproof and strong, these surface fillers remain flexible when repairing rips, tears, and holes in neoprene rubber. They're often used on wetsuits.

Fill the void beneath motors, pumps, and other large machinery to create a structural support for your equipment. Also known as chocking epoxies, these epoxies replace traditional metal chocks, which often need to be machined. Mix these two-part epoxies and pour them in between your equipment and your base—they flow into every nook and cranny for a strong, long-lasting bond. As these epoxies cure, they won’t shrink. Designed to withstand demanding environments, these epoxies handle heavy loads, vibration, and chemicals without cracking. Especially good for harsh marine applications, you can use them when installing marine engines and deck-supported equipment, such as hoists and winches.

Certificates with a traceable lot number and product shelf life are available for these products. Download certificates from ACTIVITY after your order ships.

Repair rips, split seams, and detached soles to stop leaks in shoes, boots, and waders. These polyurethane adhesives create a strong, flexible seal that keeps water out, so they’re also used to coat seams. Use on leather, plastic, and rubber. They fully harden in 10 hours and dry clear.