(1) Acrylonitrile-butadiene-styrene or ABS welding adhesive. Any adhesive labeled to weld acrylonitrile-butadiene-styrene pipe, which is made by reacting monomers of acrylonitrile, butadiene and styrene.

(2) Adhesive. Any chemical substance that is applied for the purpose of bonding two surfaces together other than by mechanical means.

(3) Adhesive primer. Any product labeled for application to a substrate, prior to the application of an adhesive, to provide a bonding surface.

(4) Aerosol adhesive. An adhesive packaged as an aerosol product in which the spray mechanism is permanently housed in a non-refillable can designed for hand-held application without the need for ancillary hoses or spray equipment.

(5) Architectural. Architectural shall pertain to stationary structures, including mobile homes, and their appurtenances. Appurtenances to an architectural structure include, but are not limited to: hand railings, cabinets, bathroom and kitchen fixtures, fences, rain gutters and downspouts and windows.

(6) Automotive glass adhesive sealer. Any adhesive primer that improves adhesion to the pinch weld and blocks ultraviolet light and that is designed for application to automotive glass prior to installation with an adhesive/sealant.

(7) Ceramic tile installation adhesive. Any adhesive labeled for use in the installation of ceramic tiles.

(8) Chlorinated polyvinyl chloride plastic or CPVC plastic. A polymer of the vinyl chloride monomer that contains 67 percent chlorine.

(9) Chlorinated polyvinyl chloride welding adhesive or CPVC welding adhesive. Any adhesive designed for welding of polyvinyl chloride plastic.

(10) Cleanup solvent. A solvent used to remove excess adhesive, sealant, adhesive primer or sealant primer from a substrate.

(11) Commercial adhesive. An adhesive product that is sold or supplied by the manufacturer or supplier in containers with a net volume greater than 16 fluid ounces, or a net weight greater than one pound, and is not subject to Part 235 of this Title. Commercial adhesives do not include products that are incorporated into or used exclusively in the manufacture or construction of the goods or commodities that are produced by the establishment.

(12) Computer diskette jacket manufacturing adhesive. Any adhesive designed to glue the fold-over flaps to the body of a vinyl computer diskette jacket.

(13) Contact bond adhesive. Any adhesive that forms an instantaneous, non-repositionable bond when substrates, on which the adhesive was applied and allowed to dry, are brought together using momentary pressure.

(14) Cove base. A flooring trim unit, generally made of vinyl or rubber, having a concave radius on one edge and a convex radius on the opposite edge that is used in forming a junction between the bottom wall course and the floor or to form an inside corner.

(15) Cove base installation adhesive. Any adhesive labeled for the installation of cove base or wall base on a wall or vertical surface at floor level.

(16) Cyanoacrylate adhesive. Any adhesive with a cyanoacrylate content of at least 95 percent by weight.

(17) Dry wall installation. The installation of gypsum dry wall to studs of solid surfaces using an adhesive labeled for that use.

(18) Flexible vinyl. Non-rigid polyvinyl chloride plastic with at least five percent by weight plasticizer content.

(19) Fiberglass. A material consisting of extremely fine glass fibers.

(20) Indoor floor covering installation adhesive. Any adhesive labeled for use in the installation of wood flooring, carpet, resilient tile, vinyl tile, vinyl backed carpet, resilient sheet and roll or artificial grass. Adhesives used to install ceramic tile and perimeter bonded sheet flooring are not indoor floor covering installation adhesives.

(21) Industrial adhesive. A product category which includes adhesives (including adhesive primers used in conjunction with certain types of adhesives) used at industrial manufacturing and repair facilities for a wide variety of products and equipment that operate adhesives application processes.

(22) Industrial adhesive application processes. Industrial adhesive application processes shall include the application of the adhesives, sealants, adhesive primers or sealant primers listed in table 1 of this Subpart and shall also include the application of other materials used for the same purposes contained in the definitions of each adhesive, sealant, adhesive primer and sealant primer in this section.

(23) Laminate. A material made by bonding two or more sheets or layers.

(24) Low-solids adhesive, sealant or primer. Any product that contains 120 grams or less of solids per liter of material.

(25) Marine deck sealant or marine deck sealant primer. Any sealant or sealant primer labeled for application to wooden marine decks.

(26) Metal to urethane/rubber molding or casting adhesive. Any adhesive labeled to bond metal to high density or elastomeric urethane or molded rubber materials, in heater molding or casting processes, to fabricate products such as rollers for computer printers or other paper handling equipment.

(27) Multipurpose construction adhesive. Any adhesive labeled for use in the installation or repair of various construction materials, including but not limited to drywall, subfloor, panel, fiberglass reinforced plastic (FRP), ceiling tile and acoustical tile.

(28) Non-membrane roof installation/repair adhesive. Any adhesive labeled for use in the installation or repair of non-membrane roofs and that is not intended for the installation of prefabricated single-ply flexible roofing membrane, including, but not limited to, plastic or asphalt roof cement, asphalt roof coating and cold application cement.

(29) Outdoor floor covering installation adhesive. Any adhesive labeled for use in the installation of floor covering that is not in an enclosure and that is exposed to ambient weather conditions during normal use.

(30) Panel installation. The installation of plywood, pre-decorated hardboard (or tileboard), fiberglass reinforced plastic, and similar pre-decorated or non-decorated panels to studs or solid surfaces using an adhesive formulated for that purpose.

(31) Perimeter bonded sheet flooring installation. The installation of sheet flooring with vinyl backing onto a nonporous substrate using an adhesive designed to be applied only to a strip of up to four inches wide around the perimeter of the sheet flooring.

(32) Plastic cement welding adhesive. Any adhesive labeled for use to dissolve the surface of plastic to form a bond between mating surfaces.

(33) Plastic cement welding primer. Any primer labeled for use to prepare plastic substrates prior to bonding or welding.

(34) Plastic foam. Foam constructed of plastics.

(35) Plasticizer. A material, such as a high boiling point organic solvent, that is added into a hard plastic to provide a desired flexibility or pliability.

(36) Plastics. Any of various organic compounds produced by polymerization, capable of being molded, extruded, cast into various shapes and films or drawn into filaments.

(37) Polyvinyl chloride plastic or PVC plastic. A polymer of the chlorinated vinyl monomer that contains 57 percent chlorine.

(38) Polyvinyl chloride welding adhesive or PVC welding adhesive. Any adhesive labeled for use in the welding of PVC plastic pipe.

(39) Porous material. A substance that has tiny openings, often microscopic, in which fluids may be absorbed or discharged, including, but not limited to, wood, paper and corrugated paperboard.

(40) Propellant. A fluid under pressure that expels the contents of a container when a valve is opened.

(41) Reactive diluent. A liquid that is a reactive organic compound during application and one in that, through chemical and/or physical reactions, such as polymerization, 20 percent or more of the reactive organic compound becomes an integral part of a finished material.

(42) Retail outlet. Any establishment at which adhesives, sealants and primers are sold, supplied, or offered for sale directly to consumers.

(43) Roadway sealant. Any sealant labeled for application to public streets, highways and other surfaces, including but not limited to curbs, berms, driveways and parking lots. Asphalt-based surface coating is regulated pursuant to Part 241 of this Title.

(44) Rubber. Any natural or manmade rubber substrate, including but not limited to, styrene-butadiene rubber, polychloroprene (neoprene), butyl rubber, nitrile rubber, chlorosulfonated polyethylene and ethylene propylene diene terpolymer.

(45) Sealant primer. Any product labeled for application to a substrate, prior to the application of a sealant, to enhance the bonding surface.

(46) Sealant. Any material with adhesive properties that is formulated primarily to fill, seal, waterproof or weatherproof gaps or joints between two surfaces. Sealants include sealant primers and caulks.

(47) Sheet-applied rubber installation. The process of applying sheet rubber liners by hand to metal or plastic substrates to protect the underlying substrate from corrosion or abrasion, inclusive of the process of laminating sheet rubber to fabric by hand.

(48) Single-ply roof membrane. A prefabricated single sheet of rubber, normally ethylene-propylenediene terpolymer, that is field applied to a building roof using one layer of membrane material.

(49) Single-ply roof membrane installation and repair adhesive. Any adhesive labeled for use in the installation or repair of single-ply roof membrane. Installation includes, as a minimum, attaching the edge of the membrane to the edge of the roof and applying flashings to vents, pipes and ducts that protrude through the membrane. Repair includes gluing the edges of torn membrane together, attaching a patch over a hole and reapplying flashings to vents, pipes or ducts installed through the membrane.

(50) Single-ply roof membrane adhesive primer. Any primer labeled for use to clean and promote adhesion of the single-ply roof membrane seams or splices prior to bonding.

(51) Single-ply roof membrane sealant. Any sealant labeled for application to single-ply roof membrane.

(52) Solvent. Organic compounds that are used as diluents, thinners, dissolvers, viscosity reducers, cleaning agents or other related uses.

(53) Structural glazing adhesive. Any adhesive labeled to apply glass, ceramic, metal, stone or composite panels to exterior building frames.

(54) Subfloor installation. The installation of subflooring material over floor joists, including the construction of any load bearing joists.

(55) Surface preparation solvent. A solvent used to remove dirt, oil and other contaminants from a substrate prior to the application of a primer, adhesive or sealant.

(56) Thin metal laminating adhesive. Any adhesive labeled for use in bonding multiple layers of metal to metal or metal to plastic in the production of electronic or magnetic components in which the thickness of the bond line(s) is less than 0.25 mils.

(57) Tire repair. A process that includes expanding a hole, tear, fissure or blemish in a tire casing by grinding or gouging, applying adhesive and filling the hole or crevice with rubber.

(58) Tire tread adhesive. Any adhesive labeled for application to the back of precure tread rubber and to the casing and cushion rubber. Tire tread adhesive may also be used to seal buffed tire casings to prevent oxidation while the tire is being prepared for a new tread.

(59) Traffic marking tape. Preformed reflective film labeled for application to public streets, highways and other surfaces, including but not limited to curbs, berms, driveways and parking lots.

(60) Traffic marking tape adhesive primer. Any primer labeled for application to surfaces prior to installation of traffic marking tape.

(61) Waterproof resorcinol glue. A two-part resorcinol-resin-based adhesive designed for applications where the bond line must be resistant to conditions of continuous immersion in fresh or salt water.