About Plastpro
Plastpro is a City of Industry, California manufacturer of fiberglass door slabs and prehung entry door systems for the residential construction market. The company has built its reputation specifically on fiberglass door skin technology — offering a range of smooth and woodgrain surface profiles that accept paint, stain, and factory-applied finishes comparable to or exceeding the visual characteristics of wood entry doors, at a weight and maintenance profile that wood cannot match.
Plastpro's product catalog centers on fiberglass door slabs in smooth and woodgrain surface options across standard and non-standard widths, available as component slabs for door fabricators or as fully assembled prehung entry systems with frame, weatherstripping, and pre-bored hardware preparation. The woodgrain surface profiles — offered in fir grain, mahogany grain, and smooth variants — are a central differentiating claim, intended for stain applications that replicate the warmth of wood entry doors. Foam core construction provides thermal insulation superior to hollow steel alternatives.
Plastpro distributes primarily through door fabricators, millwork houses, and regional building material distributors who assemble and sell prehung door units incorporating Plastpro slabs to contractors and homeowners. The company's West Coast manufacturing base supports competitive availability in California, the Southwest, and Pacific markets where fiberglass entry doors represent a significant share of the new construction and replacement entry door category. Contractors specifying fiberglass entry doors where stain finish and wood grain appearance are a priority should confirm specific surface profiles and finish compatibility with the local distributor.
Company Snapshot
Product Lines
Fiberglass Door Slabs
Smooth and woodgrain surface fiberglass door slabs in standard and custom sizes, sold to door fabricators and millwork houses for prehung unit assembly.
- Smooth fiberglass surface for paint applications
- Fir grain and mahogany grain woodgrain profiles for stain
- Polyurethane foam core for thermal performance
- Standard 6-8, 8-0, and custom height options
Prehung Entry Door Systems
Fully assembled prehung entry door units incorporating Plastpro fiberglass slabs with frame, weatherstripping, and hardware preparation.
- Pre-bored hardware preparation
- Factory-primed or factory-stained finish options
- Coordinated sidelite units available
- Standard and custom width configurations
Common Applications
Residential New Construction
Production and custom home builders specifying fiberglass entry door slabs through millwork and door fabricator channels.
Replacement Entry Doors
Replacement contractors and millwork dealers sourcing fiberglass slab products for custom-assembled prehung replacement units.
West Coast and Southwest
California, Arizona, Nevada, and Pacific markets where Plastpro's manufacturing base supports competitive lead times and distributor stocking.
What To Know
Woodgrain surface for stain
Plastpro's fir grain and mahogany grain surface profiles are engineered for stain application — the woodgrain texture depth determines how well the stain renders as a wood substitute.
Slab-focus serving the fabricator channel
Selling slabs to fabricators rather than only prehung units gives millwork dealers flexibility to assemble door systems to their own frame and hardware specifications.
Editorial profile based on Plastpro public product and company materials; last reviewed May 2026.