Epoxy: US Composites : great for epoxy and closed cell foam, fabric and other. Look at this site. Watertite : great for blister repair or any fiberglass or gel coat repair where the is a small area that is not worth mixing up cabisol. Cabosil: additive to epoxy resign that acts like a thickener, great strength, better than micro balloons where strength is needed. Filites careful where you get it, Bryan Marine $25 for gallon can, US Composites $21 for 5 gallon can. Glovit: epoxy paint primer that is light and flows into hairline cracks and really seals the piece. Great as a first undercoat. System Three 2 part Epoxy have not used it yet but may use it over my epoxy for coverage and uv protection Sealers and caulking: Boat life: What Grant uses all kinds available Dolphinite: Recommended by Ensign Spars have not used it yet