Adhesives & Sealants
At Rainbow Technology, we engineer high-performance sealants and adhesives for a wide range of industrial, electrical, and utility applications. Backed by our advanced sealant technologies, our products are proven to consistently deliver superior bonding strength, flexibility, and weather resistance.
Please scroll to the product listing sections above to explore our full collection of high-performing adhesives and sealants.
Advanced Sealant Technologies for Strong, Reliable Bonds
At Rainbow Technology, innovation is built into every sealant and adhesive we make. Our industry-leading sealant technologies combine advanced materials, proprietary chemical processes, and precision engineering methods developed through decades of hands-on utility and industrial experience.
Each formulation—whether polyurethane, epoxy, RTV (Room-Temperature Vulcanizing) silicone, or expanding foam—is engineered in-house to deliver superior temperature stability, weather resistance, and lasting flexibility. These innovations allow our adhesives and sealants to bond reliably to metal, concrete, plastic, and cable surfaces, even under harsh environmental and mechanical stress.
From sealing electrical systems and cable ducts to securing industrial structures, our technologies are field-proven to perform where other products fail. Every adhesive and sealant reflects our commitment to innovation, performance, and reliability. When the job demands long-term adhesion and durability with zero margin for error, Rainbow delivers technology you can always count on.
Applications of Our Sealants & Adhesives
Our adhesive and sealant products are useful for a versatile range of industries, utility markets, and specific applications, including:
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HVAC, Plumbing, and Electrical Systems: HVAC technicians, plumbers, and electricians will find our sealant products, like Rainbow Duct Seal Putty, efficient for creating a water-resistant, non-corrosive, and immediately paintable seal around refrigerant lines, pipe junctions, wall sleeves, duct penetrations, and more.
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Construction & Roofing Solutions: Our entire catalog of industrial adhesives and sealants is trusted by contractors, construction workers, roofers, and engineers worldwide. Our rapid-bonding Weld-It Rapid Setting Epoxy Adhesive, for example, is highly regarded in the construction industry for quick on-site repair work.
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Automotive & Fleet Repair Applications: Many of our products are well-suited for automotive and fleet repair, including our Rainbow Fiberglass Protective Coating Spray, for its longevity, weather and corrosion resistance, and UV resistance. This coating is particularly useful for protecting fleet vehicle frames, undercarriages, or body panels.
Why Choose Rainbow Technology Sealant Solutions
We have 50+ years of experience serving a diverse range of industrial markets, including electrical, telecommunications, automotive, HVAC, plumbing, and construction. Regardless of your sector, if you require a reliable industrial adhesive and sealant products manufacturer and supplier, we'd love to work with you.
In everything we do, we strive to exemplify integrity, respect, and a customer-first approach. We aim to build lasting relationships with our partners on a foundation of trust, always keeping our word.
Our products are made of fast-curing, long-lasting bonding materials compatible with multiple substrates (metal, glass, rubber, plastic). They’re also backed by U.S. quality standards, customer support, and a warranty against material and workmanship defects under normal use for up to 24 Months following the invoice date.
Frequently Asked Questions About Sealants & Adhesives
What’s the difference between a sealant and an adhesive?
The primary purpose of a sealant product is to seal or fill in a hole, gap, or crack to block out the elements (air, water, dust) or chemicals from entering or passing through.
An adhesive product makes two things adhere, bond, or stick together, whether permanently or semi-permanently.
What is the sealant that performs best in outdoor environments?
Most of our sealants perform well in outdoor environments, but if we were to recommend two products, we'd suggest our Fiberglass Protective Coating Spray and Duct Seal Putty. Both are specifically designed to perform indoors and outdoors, and they deliver UV resistance (which is necessary for protecting your projects from the sun).
Can I use these adhesives/sealants on metal or plastic?
Most of our adhesive and sealant products can be used on metal and plastic, but it is vital to remember that not all plastics are created equal. Some plastics may deteriorate due to the chemical solutions in certain adhesive and sealant products or bond poorly with them. Before using one of our adhesive products on plastic, ensure that the type of plastic is compatible with it by reviewing the product's individual listing page on our website or by calling our Customer Service department at 1-800-637-6047.
How do I choose the right adhesives/sealants for my application?
You can choose the proper sealant for your application by clicking on the product listings on this page to read their descriptions on their individual listing pages, or you can call our Customer Service department at 1-800-637-6047 to ask questions and receive suggestions.
Are Rainbow sealants temperature or chemical-resistant?
At Rainbow Technology, we engineer all of our sealants with temperature and chemical-resistant materials. For detailed specifications on the exact chemicals and temperature ranges that our sealants can withstand, please thoroughly review the descriptions on each product's individual listing page here on our website.
Does Rainbow Tech offer any silicone/silicon adhesives/sealants?
Yes, we do! Check out our Clear RTV Silicone Adhesive/Sealant spray.