PDFWAC 296-17A-3511
Classification 3511.
3511-02 Fiberglass goods: Manufacturing, N.O.C.
Applies to:
Businesses manufacturing of a wide variety of fiberglass goods not covered by another classification (N.O.C.).
Fiberglass is a composite material consisting of glass fibers in resin; it is applied over or into molds by spraying, brushing, or spreading.
Products manufactured include, but are not limited to:
• Auto body parts such as fenders, hoods, or visors;
• Boat hulls;
• Chair frames;
• Display carts;
• Doors;
• Fish tanks;
• Hot tubs;
• Industrial equipment;
• Pick up canopies;
• Satellite dishes;
• Signs;
• Swimming or wading pools;
• Tanks.
Materials used include, but are not limited to:
• Fiberglass ribbon;
• Liquid hardeners;
• Molds;
• Resin (usually received in barrels).
Work activities and processes include, but are not limited to:
• Mold making for their own production is included within the scope of this classification when done by employees of an employer subject to this classification. Molds are usually made of wood; they are smoothed and shaped with a filler, like auto body putty, before being coated with fiberglass;
• Spraying molds with a release agent so the item is more easily removed;
• Spraying resin with a compressed air gun through a chopper gun into the mold;
• Feeding ribbon of fiberglass through a razor cutter chopping it into short lengths and blowing it into molds;
• Removing material from the mold after desired thickness is attained and it is set and cured;
• Smoothing the sprayed fiberglass with a hand-held rubber roller;
• Applying various materials such as "gel" or "vinyl" to produce a glossy surface;
• Joining parts to make very large items;
• Attaching hardware.
Exclusions:
• Manufacture of plastic items by blow molding or extrusion, vacuum forming, foam, rotary, or liquid molding, or injection molding, and businesses engaged in the manufacture of artificial marble items or graphite composite goods, are classified in 3510;
• Cutting, milling, bending, heating and shaping of hard plastic goods are classified in 3512;
• Manufacturing of auto body parts from materials other than fiberglass are reported separately in the classification applicable to the materials and the processes being used.
[Statutory Authority: RCW 51.04.020 and 51.16.035. WSR 25-23-070, s 296-17A-3511, filed 11/18/25, effective 1/1/26. WSR 07-01-014, recodified as § 296-17A-3511, filed 12/8/06, effective 12/8/06. Statutory Authority: RCW 51.16.035. WSR 98-18-042, § 296-17-59203, filed 8/28/98, effective 10/1/98. Statutory Authority: RCW 51.04.020(1) and 51.16.035. WSR 91-12-014, § 296-17-59203, filed 5/31/91, effective 7/1/91.]