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GracoRoberts supplies primers and surface treatments for aerospace, defense, and industrial composite manufacturing and repair. Proper surface preparation and primer selection are critical to achieving reliable adhesion, corrosion protection, and consistent performance in composite bonding and coating applications.
Our portfolio includes pre-bond cleaners, structural adhesive primers, corrosion-inhibiting primers, and adhesion promoters from leading aerospace manufacturers. These materials support surface preparation and treatment processes for composite structures, metallic components, and mixed-material assemblies.
Pre-bond cleaners and surface treatments help remove contaminants and prepare substrates for adhesive bonding or coating applications. Depending on the material and process requirements, these products support the removal of oils, residues, and other surface contaminants that can interfere with adhesion.
Surface preparation methods should be selected based on substrate compatibility, adhesive requirements, and applicable manufacturing specifications.
Structural adhesive primers are used to prepare compatible substrates for bonding with structural paste and film adhesives. Depending on the formulation and application, these primers can support adhesion, environmental resistance, and long-term bond durability.
Available formulations include solvent-based and water-based options for applicable aerospace bonding processes.
Corrosion-inhibiting primers help protect metallic substrates used in composite-to-metal assemblies and other aerospace applications. These materials support corrosion protection and, where specified, adhesion between metallic surfaces and compatible bonding or coating systems.
Available products include chromate-containing and chromate-free formulations, with applicable qualifications varying by product.
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.
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.
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.
Primers and surface treatments may be available in aerosol, brush-applied, and bulk formats, depending on the product.
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.
