I've personally found Sikaflex to be over-rated, and have always had great results both above and below the water line with silicone sealants.
Technology has progressed and they are really effective in most applications, although I guess Sika still has its place for some applications.
But universal use for everything boaty, definitely not!
The main function of any vessel is to navigate through water and still keep it out. Therefore, it is not surprising that sealants are widely used onboard a boat or boat. The main functions of sealants include:
Forming a watertight seal between two or more parts;
use as an adhesive to join two or more parts (often used in conjunction with mechanical fasteners);
insulating parts or parts of the ship to prevent noise, abrasion, etc.
Sealing compounds cure a rigid, flexible. For a good choice of sealants, study this sealwithease.com/concrete-sealer/.