Provisional datasheet Fire Retardant Epoxy Wet Laminating System ■ Formulated to meet the requirements of UL94VO test standard ■ Range of working times ■ Good cure progression from ambient only cures ■ Ideal for wet laminating large composite structures ■ Formulated to give good Health & Safety characteristics Ampreg 21 FR has been optimised for the manufacture of large composite structures using hand layup, and vacuum bagging techniques. Ampreg 21 FR has been designed to give excellent mechanical and thermal properties from both ambient temperature cures, and moderate temperature postcures (50°C) This system is available with a range of hardener speeds, from Fast to Ultra Slow.

Workshop Conditions Ampreg 21FR is optimised for use between 18 - 25°C. At lower temperatures the product thickens and may become unworkable. At higher temperatures working times will be significantly reduced. Maximum relative humidity for use is 70%. Ampreg 21 FR should be mixed at the following ratios: Hardener (Fast, Standard, Slow, Extra Slow) Hardener (Ultra Slow) It is important that the resin and hardener components are measured out accurately. Measurement by weight and electronic scales are recommended for this purpose. The two components must be mixed thoroughly. If mixing by hand particular...

Curing Schedule Ambient Temperature Cure The system has been developed to provide good mechanica properties after an ambient only cure. The minimum recommended cure temperature is 18°C. Excellent mechanical/thermal properties can be achieved after a slightly elevated temperature post-cure. An initial cure of 42 hours (with uxtra slow hardener) or 16 hours (with fast hardener) at 20°C is recommended before demoulding When using the Extra Slow or Ultra Slow Hardener, an elevated temperature postcure of 40 C for 16 hours, is strongly recommended. Elevated Temperature Cure Post curing the laminate...

Properties (cont'd) * It is recommended to postcure laminates for 16 hours at 40°c, when manufactured using Extra Slow or Ultra Slow Hardeners

6. The inhalation of sanding dust should be avoided and if it settles on the skin then it should be washed off. After more extensive sanding operations a shower/bath and hair wash is The following points must be considered 1. Skin contact must be avoided by wearing protective gloves. Gurit recommends the use of disposable nitrile gloves for most applications. The use of barrier creams is not recommended, but to preserve skin condition a moisturising cream should be used after washing Gurit produces a separate full Material Safety Data Sheet for all hazardous products. Please ensure that you have...

Transport & Storage The resin and hardeners should be kept in securely closed containers during transport and storage. Any accidental spillage should be soaked up with sand, sawdust, cotton waste or any other absorbent material. The area should then be washed clean (see appropriate Safety Data Sheet). Adequate long term storage conditions will result in a shelf life of two years for both the resin and hardeners. Storage should be in a warm dry place out of direct sunlight and protected from frost. The temperature should be between 10°C and 25°C. Containers should be firmly closed. Hardeners,...