Epoxy 421 Resin 5Lt Kit 4Lt Resin + 1Lt Hardener

Norski 421 Epoxy system is a specifically designed epoxy laminating/sheathing and adhesive system for marine and general use. It has been developed to provide superior wetting out and curing characteristics at ambient temperature.

AREAS OF USE As the structural adhesive in composite systems. As a protective epoxy sheathing system on wooden and GRP hulls, with or without glass cloth. As a coating system on ferro-cement hulls. Designed to be used with a range of "glue" and "filler powders". Extend with fillers for gap fill gluing. Use with "fairing blend" or micro-ballons as a structural fairing and filling compound.

APPEARANCE Unfilled liquid of clear/translucent amber colour.

TYPE A highly reactive epoxy resin of low viscosity, and modified polyamine curing agent.

PHYSICAL PROPERTIES The 421 Epoxy system is especially formulated to have a low mixed viscosity. May require thickening with fumed silica/aerosol on porous surfaces to minimise excessive soakage.

MIXING RATIO Use four parts standard resin to one part hardener by volume. No thinning required.

NOTE The correct ratio must be adhered to. Varying the mix ratio will not slow or accelerate the cure time, but will decrease the physical properties of the cured system. Use soap and warm water to clean uncured resin off hands. Thoroughly mix the resin and hardener by stirring with a wide blade spatula for at least one minute.

CURE Norski 421 system will cure at temperatures down to 10°C. Initial cure is overnight, but total cure is not attained for three to seven days, dependent on temperature. Post curing at 60°C overnight will increase the ultimate strength of the thin film. A handy hint for improving the curing characteristics of the 421 system in colder weather is to allow the mixed resin an induction period before application. That is, mix the resin and hardener, then allow it to stand in the container until the mixture reaches body temperature before use.