Casting resins are normally either clear or can take fillers . They are made to handle small or large (up to 80kg) casts. Clear casting resins are ideal for small figurines (often cast into silicone moulds) Large casting resins are almost always filled with fillers (see section on fillers)
Putties or pastes are often used as adhesives and for bonding cores such as Balsa and foams.
Gelcoats are a polyester coating that is applied to a mould surface and becomes an integral part of the finished product. Can be coloured to almost any colour. Can be UV stable and give off a lustre for a long period of time.
Topcoats are similar to Gelcoats however are applied after the initial laminate of resin and fibreglass is applied. Used to finish swimming pools , boats , etc.