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GracoRoberts supplies surface preparation products and bonding primers for composite manufacturing and assembly. Proper pre-bond surface preparation is one of the most critical factors in achieving consistent, qualified bond performance in composite structures.
Our portfolio includes pre-bond cleaners, structural adhesive primers, corrosion-inhibiting primers for composite-to-metal interfaces, and surface treatment products from leading aerospace manufacturers. We support the full surface preparation workflow from initial cleaning through primer application and bond-ready confirmation.
Solvent and aqueous cleaners for removing contamination from composite surfaces prior to bonding or priming. Includes products for removing mould release agents, processing oils, and atmospheric contamination that would reduce adhesion or bondline strength.
Epoxy-based adhesive primers that promote adhesion between composite substrates and structural adhesives or film adhesives. Used prior to bonding to improve peel strength, moisture resistance, and long-term durability of the bondline. Available in solvent-based and water-based formulations to suit process requirements.
Where composite structures interface with metallic components, corrosion-inhibiting primers protect the metallic surface and promote adhesion at the joint. Products include chromate and chromate-free options qualified to Boeing, Airbus, and military specifications.
Adhesion promoters for improving bond performance on difficult substrates including thermoplastic composites, PTFE, and low-surface-energy materials. Used when standard surface preparation alone is insufficient to achieve required bond strength.
Thorough surface preparation before structural adhesive bonding ensures consistent bondline strength and reduces the risk of adhesive failure at the interface. Proper cleaning and priming can be as critical as adhesive selection to achieving qualified performance.
At composite-to-metal interfaces, correct primer selection protects against galvanic corrosion and promotes adhesion across two dissimilar substrate types. Our team can advise on compatible primer and adhesive combinations for mixed-material assemblies.
In maintenance and repair operations, pre-bond surface preparation re-establishes a clean, contaminant-free substrate for structural adhesive application. Fast-drying cleaners and ambient-cure primers support depot and field repair workflows.
Beyond structural bonding, surface treatments and primers improve adhesion of topcoats and protective coatings on composite surfaces, which is particularly relevant for exterior aircraft panels and radome assemblies.
Our surface preparation products work alongside our composite bonding systems and process materials to provide a complete pre-bond and layup workflow.
Surface preparation products are available in formats suited to both production and field application, including aerosol, brush, and bulk container formats. Application method, drying time, and compatibility with downstream adhesive systems should all be confirmed at the material selection stage.
We provide data sheet review and process guidance to ensure surface preparation steps are correctly sequenced and compatible with your bonding or coating system. For structural bonding applications, we recommend confirming primer-adhesive compatibility before qualification testing.
We support qualification workflows for composite surface preparation products, including lot traceability, shelf life management, and certificates on request. Many structural adhesive primers in our portfolio are qualified to Boeing BMS, Airbus AIMS, and US military specifications.
What we provide:
Need help selecting surface preparation products for your composite assembly process? Talk to our team about solutions aligned to your specification and documentation requirements.
The required steps depend on the substrate, adhesive system, and program specification. Typically this involves solvent cleaning to remove contamination, mechanical abrasion or peel ply removal to expose a fresh surface, and application of a structural adhesive primer where specified. Our team can advise on the correct sequence for your application.
Many structural film adhesive systems recommend or require a compatible adhesive primer to achieve full bond performance and meet qualification requirements. Confirm primer requirements in the adhesive product data sheet or contact us for guidance.
Yes. We supply both chromate and chromate-free primer options qualified to relevant aerospace specifications. Chromate-free alternatives are available where environmental or regulatory requirements preclude the use of chromate-based products.
Yes. Our team can review your adhesive system, substrate type, and program specification to recommend compatible surface preparation products and confirm process sequencing. Contact us to discuss your application.
