How Above Ground Fiberglass Tanks are made

Fextex supplies filament wound tanks that have at least four layers

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First Layer- 20 mils thick 90% resin reinforced with glass or synthetic veil



Second Layer- Resin rich chop strand that is no less than 80 mils thick 65% resin

The first two layers equal a 100 mil corrosion barrier. The resin applied is determined​

by the liquid being stored and temperature limits.



Third Layer-  Filament wound, resin impregnated, continuous strands of fiberglass

that are applied to a rotating mandrel. This layer contains 70% glass and 30% resin.



Fourth Layer- 10 mil thick pigment or gel coat for protection from ultraviolet ray degradation. 

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