Epoxide

Epoxides, or epoxy resins, are polymers formed from a resin and a hardener.
They have a wide range of uses including coatings, adhesives and composites such as carbon fibre and fibreglass.

They have excellent heat-resistance, mechanical and water-proofing qualities.
They are sold as repair resins for boats as they are known to have excellent adhesion to many materials including timber and they have very good gap-filling properties.

They can, however, deteriorate in UV light so are usually coated with varnishes which provide UV protection.