Manufacturer / Brand name(s) / Product type / What Is It? / Composition by weight
A.E.R.T. / ChoiceDek, MoistureShield / Decking / WPC / 45%-48% polyolefin, 49%-52% red oak fiber, 0.01%-1.5% carbon black (for products with colors), 1% to 5% metallic oxide pigments (for products with colors).
Advanced TrimWright / ATW Trimboard / Trim / PVC / 50%-100% PVC, zero-50% proprietary mixtures.
Aeratis / Aeratis / Porch / PVC / 50%-85% PVC compound, 10%-25% cellulose, zero to 5% lubricant mixture (calcium stearate, paraffin wax, polyethylene wax), zero to 3% process aids, acrylic polymers (proprietary), zero to 10% impact modifiers, acrylic (proprietary), unlisted amount of colorants (titanium dioxide and proprietary organic and inorganic pigments).
AZEK (Vycom Corp.) / PVC, Vintec I, Vintec II, Celtec, AZEK / Trim / PVC / 70%-95% PVC polymer, zero to 30% calcium carbonate and titanium dioxide, zero to 2% heat stabilizer (organotin compounds), zero to 4% lubricants (calcium stearate, paraffin, polyethylene, polyamide compounds, or esters); zero to 2% process aids (acrylic compounds), zero to 10% impact modifiers (CPE, ABS, MBS or acrylic compounds), zero to 2% organic and inorganic colorants, zero to 1% blowing agents (azo compounds or sodium bicarbonate).
Barrette / Barrette Outdoor Living / Railing, fencing and sheds / PVC / "All ingredients are bound up in the manufacturing process and are not expected to create any hazard in handling or use. Finished goods are inert."
Deceuninck North America / Composite wood product / Decking / WPC / 55%-90% wood flour, 5%-35% high-density polyethylene, <10% inert proprietary ingredients, >5% talc.
Deceuninck North America / PVC compound / Decking / PVC / >30% PVC resin, <5% organotin stabilizer, <70% mixture of proprietary additives.
Fiber Composites LLC / CertainTeed EverNew PT / Decking / WPC / "This matrix contains predominantly wood fiber and polyethylene. The polyethylene can be sourced as virgin or regrind (recycled) materials. The standard product is approximately 50% thermoplastic and 50% wood fiber."

Fiberon / Fiberon decking including Home Select; Horizon and Pro-Tect decking / Decking / WPC / 40%-60% wood fiber, 60%-40% polyethylene.
Fiberon / Horizon Plus / Guardrail / WPC / "This mixture contains predomantly wood fiber and PVC. The PVC can be sourced as virgin or regrind (recycled) materials). The standard product is approximately 75%-90% thermoplastic and 10%-25% wood fiber. In addition, the extruded profile (guardrail components) are covered in a predominately PVC capstock."
Fiberon / Outdoor Flooring / Decking / PVC / 75%-99% PVC resins, zero to 20% calcium carbonate, zero to 12% titanium dioxide, zero to 10% impact modifier, zero to 7% wax, zero to 5% processing aid, zero to 2% calcium stearate, zero to 2% tin stabilizer, zero to 0.5% pigment.
Formosa Plastics Corp. / CertainTeed EverNew LT / Decking / PVC / 75%-99% PVC resins, zero to 20% calcium carbonate, zero to 12% titanium dioxide, zero to 10% impact modifier, zero to 7% wax, zero to 5% "processing aid," zero to 2% calcium stearate, zero to 2% tin stabilizer, zero to 0.5% pigment.
GAF / DuraLife Natural Grain Collection / Decking / High-density polyethylene/rice hull / 40%-60% rice hulls, 25%-50% polyethylene, 10%-35% proprietary non-hazardous materials.
GAF / DuraLife Porch Collection / Porch / WPC / Zero to 70% sawdust, 25%-50% polypropylene, 15%-35% talc, 1%-5% zinc stearate, 10%-35% proprietary non-hazardous materials.
GAF / DuraLife RailWays / Railing / PVC/rice hull / 40%-60% rice hulls, 40%-60% PVC, zero to 5% calcium stearate, zero to 5% carbon black, zero to 5% calcium carbonate, zero to 5% titanium dioxide, zero to 5% crystalline silica, zero to 5% amorphous silica.
GAF / Duralife Siesta / Decking / Composite with wood or rice hulls / Zero to 70% sawdust or rice hulls, 25%-50% polypropylene,
15%-35% talc,10%-35% proprietary materials.
Guardian / Guardeck Elite / Decking / PVC / 50%-100% PVC, zero to 50% proprietary.
Guardian / Guardeck Prestige / Decking / WPC / 50%-65% wood flour, 30%-50% recycled high-density polyethylene flake, 1%-4% coloring agents, 1%-5% polyethylene homopolymer, zero to 8% proprietary mixture.
Inteplast Group / Tuf board products, Veranda HP, CEVN decking, InteFoam, InteCel, InteCel PW / Decking, trim, railing, fencing, molding, millwork / PVC / 50%-100% PVC, zero to 50% "proprietary."
Kleer / Kleer Decking / Trim and molding / PVC / >70% PVC, <20% calcium carbonate, <15% titanium dioxide, <9% proprietary.
Natures Composites / TerraDeck / Decking / Polyethylene/wheat straw / 60% wheat straw, 30%-40% polyethylene,<5% proprietary.
Rhino / Master Rhino Deck / Decking / WPC / 30%-50% recycled high-density polyethylene flake, 50%-65% wood flour, 1%-4% colorant, 1% to 4% UV treatment (carbon black and titanium dioxide), zero to 8% proprietary mixture.
Tamko / EverGrain / Decking / WPC / 40%-60% polyethylene, 40%-60% wood fiber dust, zero to 5% coloring agent.
TimberTech / CX-9 / Decking / WPC / 40%-60% wood fiber dust, 25%-60% HDPE, 5%-20% "trade secret," and another 2%-10% "trade secret."
TimberTech / XLM / Decking / PVC / 65%-90% PVC, 3%-15% inert fillers (calcium carbonate, titanium dioxide), 1%-5% proprietary heat stabilizers, 1%-5% proprietary lubricants, 1%-5% proprietary process aids, 2%-10% proprietary impact modifiers, 0.1%-7% proprietary pigments.
Trex / Accents / Decking / WPC / "Plastic obtained primarily from reclaimed/recycled grocery bags and stretch film; wood fiber is typically obtained from furniture makers and/or waste pallets. Standard product is approximately 30%-60% thermoplastic and 30%-60% wood fiber."
Trex / Escapes / Decking / PVC / <90% PVC, <10% acrylic copolymers, <7% calcium carbonate, <7% glass fiber, <4% calcium stearate, <3% paraffin wax, <12% titanium dioxide, <2% organotin (SN) complex, <4% brown pigment (titanium, chromium, antinomy), <2% organic calcium compound, <2% chromium compound, <4% brown pigment (Cr, Sb, MN) compound, <10% talc.
Trex / Wood-polymer products, including Transcend / Decking / WPC / "Plastic obtained primarily from reclaimed/recycled grocery bags and stretch film; wood fiber is typically obtained from furniture makers and/or waste pallets. Standard product is approximately 40%-50% thermoplastic and 50%-60% wood fiber."
Universal Forest Products / Latitudes (listed in MSDS as "Extruded Wood Plastic Composite Products" / Decking and railing / WPC / 50%-75% wood flour, 25%-50% high-density polyethylene, <10% talc, <10% inert proprietary ingredients.
Versatex (Wolfpac Technologies) / Versatex Trimboard / Trim / PVC / >70% PVC, <10% calcium carbonate, <20% titanium dioxide, <20% proprietary additives.
Wolf / Wolf PVC Trim / Trim / PVC / 50%-100% PVC, zero to 50% proprietary mixture.