Two-part acrylic adhesive

From KayakWiki

2-part acrylic adhesives set quickly and are compatible with polycarbonate plastic. Available in a 2-part syringe, squeeze a double puddle onto a scrap of cardboard or the bottom of a plastic cup and mix together.

It can also be used for quick repairs on fiberglass, composite, or wood composite hulls, but only if more suitable repair materials are unavailable.