New Primer Targets Silicone's Bonding Blind Spot

Boston Industrial Solutions, Inc. has introduced SAP-G70 Primer, a new pre-treatment product formulated to prepare silicone and other difficult-to-bond substrates ahead of application with the company's SA1-370 Silicone Glue. The Woburn, Massachusetts-based manufacturer announced the launch on July 28, 2026, positioning the primer as a dedicated surface-preparation step for manufacturers working with silicone-to-silicone and silicone-to-metal or plastic bonding.

Filling a Gap in Silicone Bonding

Silicone is prized across manufacturing for its heat resistance and flexibility, but it is notoriously difficult to bond. Its low surface energy and chemical structure resist many standard adhesives, forcing manufacturers to rely on mechanical fasteners or accept weaker bonds in applications where a strong hold is required.

SAP-G70 Primer is intended to change that calculus. According to Boston Industrial Solutions, the product is applied after surfaces are cleaned and prepared, and before SA1-370 Silicone Glue is used, effectively creating a two-product system rather than a single adhesive solution.

The company describes the process as straightforward: clean the surface, apply the primer as directed, then apply the glue. That sequencing reflects a broader trend in industrial adhesives, where surface chemistry is treated as its own discipline rather than an afterthought to the bonding agent itself.

"Developing reliable solutions for bonding silicone has been an important focus for Boston Industrial Solutions. With the introduction of SAP-G70 Primer, manufacturers now have a dedicated primer to use before SA1-370 Silicone Glue when bonding silicone to silicone or silicone to materials such as metal and plastic. This gives customers an additional tool for improving their bonding process and addressing the challenges associated with silicone substrates."

— Bonaventure Mutuku, COO of Boston Industrial Solutions

A Two-Part System for Industrial Applications

The SAP-G70 Primer is not sold as a standalone bonding solution. It is explicitly marketed as a companion product to SA1-370 Silicone Glue, which the company describes as engineered for permanent adhesion to silicone substrates. Together, the two products form a system aimed at manufacturers who need dependable adhesion across mixed-material assemblies.

This pairing matters for industries where silicone components are joined to metal housings, plastic enclosures, or other silicone parts, common configurations in electronics, appliances, and industrial equipment manufacturing. Boston Industrial Solutions positions the primer as addressing the specific chemical and surface challenges that silicone presents, rather than offering a general-purpose adhesion promoter.

The company has made both products available for order directly through its website, alongside supporting information on the recommended application process. That structure reflects how specialty chemical suppliers increasingly bundle preparation and bonding products together, rather than leaving surface treatment to trial and error on the factory floor.

Part of a Broader Product Push

The SAP-G70 launch follows closely on the heels of other recent introductions from the company. On July 15, 2026, Boston Industrial Solutions announced the Citrine® SA1-370 Silicone Glue itself, describing it as engineered to solve what it called one of manufacturing's most persistent bonding challenges. The new primer effectively extends that product's usefulness by giving manufacturers a preparation step designed specifically to work alongside it.

Earlier still, on June 26, 2026, the company introduced the Citrine® CEP-240 Silicone Primer, a separate product for bonding liquid silicone rubber to epoxy, metals, ceramics, and glass. And in mid-June, its Natron® 717N Series UV LED Ink received CPSIA certification, pointing to activity across multiple product lines rather than a single focus area.

Taken together, these releases suggest a company actively expanding its silicone-bonding portfolio in relatively short order. For manufacturers evaluating adhesive suppliers, the frequency of these launches may signal ongoing investment in addressing specific, narrow technical problems rather than offering one-size-fits-all adhesive lines.

Why Surface Preparation Matters

Adhesive failures in industrial settings often trace back to inadequate surface preparation rather than the bonding agent itself. Materials with low surface energy, silicone chief among them, are frequently cited as difficult substrates precisely because standard adhesives struggle to wet and grip their surface. A dedicated primer step, if effective, can reduce failure rates in assembly lines without requiring a change to the core adhesive formulation.

This matters more broadly for manufacturers operating in sectors such as electronics, automotive components, and medical devices, where silicone parts are common and bonding failures can carry significant cost or safety implications. By separating the primer and the glue into distinct products, Boston Industrial Solutions is following an approach already used elsewhere in the adhesives industry, where two-step systems are often preferred for demanding applications.

Whether SAP-G70 Primer meaningfully improves bond strength or consistency in practice will ultimately depend on performance data from customers using it under real manufacturing conditions, information not detailed in the company's announcement.

Boston Industrial Solutions has positioned SAP-G70 Primer as a practical addition for manufacturers already using, or considering, SA1-370 Silicone Glue. The launch adds to a string of recent product introductions from the company, spanning primers, adhesives, and inks. For now, the announcement gives manufacturers another option to weigh as they address the long-standing difficulty of bonding silicone reliably.