Coatings and Adhesives Sales in Automotive Parts Manufacturing

Coatings and adhesives sales in automotive parts manufacturing depend on understanding what each plant produces and how it produces it. Substrates, processes, and assembly methods determine chemistry demand more reliably than company size or segment codes. Those production realities provide the basis for qualifying accounts, assigning coverage, and timing calls.

Why automotive parts plants are a distinct selling environment for coatings and adhesives

Automotive parts manufacturing is a different selling environment from automotive finishing or OEM assembly. Its fragmented, multi-tier supply chain separates the plants that set specifications from the suppliers that generate purchase volume. PPG's 2025 annual report reflects this breadth within its Automotive OEM Coatings segment, covering combustion engine, commercial, and electric vehicles, as well as automotive parts and accessories, including battery-related components. That broad commercial category contains facilities with very different purchasing needs.

Qualifying accounts by industry classification fails because plants in the same category can need different chemistry. A NAICS code for motor vehicle parts manufacturing groups stamping plants, injection molders, and wiring harness assemblers under the same heading. Yet the coating needed for a stamped metal part says little about the adhesive needed for a plastic assembly. Tier plants also decide what to buy locally, so reps can sell to their specifications in ways that broad account classifications miss. The plant's production process is the only reliable signal of its chemistry needs.

How EV architecture and lightweighting have expanded which processes — and which plants — now buy coatings and adhesives

EV architecture and lightweighting have both changed the work done inside parts plants and increased demand for existing products. Multi-material assemblies combine aluminum, carbon fiber, and high-strength steel, with adhesives replacing mechanical fasteners and welding. That substitution adds adhesive demand to stamping, fabrication, and assembly operations that previously had little or none. The commercial change therefore occurs at the process level, even when the plant retains its name and industry classification. A familiar account can become a prospect for an unfamiliar chemistry family.

EV battery pack assembly needs thermal management and electrical insulation properties beyond what traditional bonding solutions can provide. In coatings, EV skateboard battery packs ride closer to road debris and require uniform epoxy films meeting ISO 12944 C5 corrosion grades. These requirements bring different products into the qualification conversation because the component's function and exposure have changed. A tier-2 aluminum die-caster or composite fabricator that had no coatings or adhesives relationship in 2018 may now be a significant buyer, but only its move into multi-material or EV-program work explains why.

The process-to-chemistry map — what each major parts manufacturing process signals about coatings and adhesives demand

The practical task is to translate those production changes into a demand profile. Each process points to the substrates it uses, the performance it needs, and the chemistry families that fit. The following map is illustrative rather than exhaustive, and its purpose is to establish that connection. It also distinguishes a likely product opportunity from a complete plant specification. Knowing that a facility makes automotive parts starts qualification, while knowing how it makes them gives the product conversation direction.

Metal stamping and fabrication use steel and aluminum sheet, making corrosion protection and paint adhesion central coating requirements. Pretreatment chemistry, including phosphating and conversion coatings, precedes the topcoat, and Henkel's Bonderite product line covers this metal pretreatment step. E-coat primer provides the first structural layer of the coating system. Structural adhesives also increasingly replace spot welds in hem flanges and closure panels. A stamping plant running closure panels is therefore an adhesives prospect as well as a coatings prospect, with the assembly method determining the additional opportunity.

Plastic injection molding and composite fabrication involve thermoplastics, thermosets, SMC, and carbon fiber reinforced polymer. Bonding these substrates to metal requires adhesives with engineered surface preparation for dissimilar materials. Their coating requirements also differ from those of stamped metal parts. Plastic coatings need different adhesion promoters and flexibility profiles, so the metal coating conversation cannot simply carry over to a molder. The useful qualification detail is the substrate combination and bonding task, rather than the fact that both plants supply the same vehicle program.

Powertrain and engine component machining for ICE programs involves cast iron and aluminum alloy. These plants need wear resistance, corrosion protection, and thread-locking, and use anaerobic adhesives and thread-locking compounds for their established assembly work. Gasket-forming sealants are recurring consumables that replenish with every production run. Although this process category is shrinking relative to EV programs, it remains a large installed base of active accounts. The coverage implication is to maintain those relationships while qualifying whether the facility is converting to EV work.

Battery pack assembly has its own chemistry needs for cells, modules, and cooling systems. Its chemistry requirements include thermal interface materials, cell-to-module structural adhesives, battery pack sealants, and electrically insulating potting compounds. Henkel launched Loctite TLB 9300 APSi in May 2023 as an injectable thermally conductive two-component polyurethane adhesive for bonding battery cells to modules and cooling systems. It combines high thermal conductivity, structural bonding, and electrical insulation, curing at room temperature without solvents.

Henkel engineers are developing adhesives that debond under heat, electric current, infrared light, magnetic charges, or solvents to support battery recycling. AI-powered vision systems check adhesive dispensing in battery assembly in real time for too much or too little adhesive, gaps, or contamination. These developments make dispensing capability and the required bond behavior relevant to qualification. A facility that enters battery pack assembly has changed its chemistry profile even if its firmographic record has not changed.

Interior trim and NVH assembly combine fabric, foam, plastic, and metal. Their needs center on NVH damping, sound deadening, and bonding dissimilar soft and rigid materials, with pressure-sensitive adhesives and hot-melt adhesives as the dominant technologies. Henkel's Teroson brand covers NVH and body-shop sealing across multiple vehicle assembly stages. In glass encapsulation and glazing, glass is bonded to metal or a polymer frame. Polyurethane sealants dominate windshield and fixed glazing bonding, making an automotive glazing plant a sealants account.

Why the OEM-to-tier coverage split determines which plants a rep should own directly and which to cover through distribution

Once reps know what a process needs, they can base coverage on account size and how complex the technical needs are, as well as geography. Hexion's SEC filing describes how it serves large customers directly and smaller customers through third-party distributors. It also describes global account teams that meet major customers' needs for technical service, supply, and commercial terms. The process map establishes which smaller plants still require direct technical attention.

OEM coatings accounts show why volume and specialty opportunity need separate treatment. PPG's Q1 2026 10-Q reports that automotive OEM coatings organic sales decreased by a low single-digit percentage driven by lower indexed-based selling prices. Direct OEM coverage is therefore exposed to pricing forces that technical specialization does not remove. At the tier level, process-specific qualification creates a different basis for the relationship. Tier-2 and tier-3 plants running EV or lightweighting programs warrant particular attention because chemistry specifications are set plant by plant.

Distribution can serve smaller plants transactionally without closing the qualification gap when their processes change. The direct sales opportunity is to identify the new chemistry category. A plant whose process profile signals pretreatment, e-coat, structural adhesive, and sealant demand warrants direct coverage regardless of headcount. Simpler requirements can remain within the channel model. Territories should therefore be drawn around where processes are concentrated, with less weight on plant count or geography, because clusters of technical demand show where direct engagement matters.

How demand patterns in parts plants actually move — and what that means for call planning

The right account list is insufficient if the call arrives after the chemistry decision. Demand in parts plants moves with production cycles, planned maintenance, and platform transitions more than with calendar quarters. Shutdown schedules identify windows for maintenance coatings and sealants, while expansions and new line commissioning create opportunities before an incumbent is locked in. A quarterly cadence cannot provide the same connection to the plant's buying task.

When a tier plant wins a new EV program, its chemistry requirements change substantially and incumbents are re-qualified. An announced new model or EV platform at a customer OEM therefore signals material requalification within the tier supply chain. Regulatory changes affecting VOC limits or corrosion standards can likewise force reformulation of an existing specification. Plant-level operational visibility makes these triggers detectable in advance, allowing call planning to follow the point at which the chemistry relationship is open to change.

Operational involvement also provides a stronger position than spot-price competition. PPG's Q3 2025 10-Q describes growth in PPG LINQ™ subscriptions and PPG Moonwalk™ installations to support customer productivity in refinish. Refinish is not parts manufacturing, but the example illustrates the broader commercial principle of embedding in customer operations. In parts accounts, that principle translates into understanding production and qualification timing. The aim is to connect technical engagement to an operational need rather than make contact simply because another quarter has begun.

The systematic under-coverage problem in specialty chemicals field sales and why it persists in automotive parts accounts

Specialty chemicals field sales teams are set up to cover broad territories, while complex parts accounts need reps who know their processes in depth. That mismatch leaves cross-sell and upsell opportunities uncaptured even when reps maintain active customer relationships. When reps have broad territories and only part of the picture of production, they fall back on familiar accounts instead of qualifying the full range of processes at each plant. More calls to the same known buyers do not reveal an unrecorded transition into a new manufacturing process.

The gap is most acute among tier-2 and tier-3 plants whose EV or multi-material work has outgrown their existing chemistry relationships. Henkel expanded its distribution partnership with Bodo Möller Chemie Group in August 2025 to strengthen adhesives supply for automotive components across Spain, France, Italy, Portugal, and the Benelux countries. That expansion shows how distribution helps suppliers reach plants beyond those their field teams can cover. Reach, however, is not the same as process qualification. A broader supply network still needs information about which facilities have entered new chemistry categories.

Existing supplier relationships offer a foundation for expansion, but they do not prove that an account is fully covered. Hexion's SEC filing describes using a reliable basic-resins supply position to develop higher-end solutions, including performance resins, curing agents, and modifiers, toward supplier-of-choice status. To grow that way, a supplier needs to find more of the customer's needs. In automotive parts, an EV platform transition can reset those needs and the associated supplier qualifications. Incumbency in ICE chemistry does not automatically carry over to battery or multi-material programs.

What plant-level production data enables that company size, NAICS codes, and sales rep intuition cannot

Closing this gap takes data on what each plant makes and how it makes it. NAICS codes describe the main types of products a plant makes but leave out the substrates, processes, or assembly methods that set its chemistry needs. Headcount measures plant size without resolving chemistry intensity. A battery module plant where much of the work is automated may buy more adhesives per employee than a large trim assembler that relies heavily on labor. Individual rep research is also too slow and inconsistent to provide deep process qualification across territories already designed for breadth.

The necessary record connects what a plant makes with how it makes it. Output identifies the relevant process category, while substrates define the chemistry families in scope. Equipment signals process capability and automation level, and OEM platform affiliation helps establish qualification timing. Activity signals, including expansion, new lines, and certification activity, indicate when the relationship may be open to change.

CRM enrichment should carry that production context into coverage and call planning. Reps can then enter plant conversations knowing the substrate, process, and likely chemistry gap. The resulting discipline is straightforward. Qualify the process first, because the plant's production reality determines both the chemistry opportunity and the commercial work needed to capture it.