Bonded Sealing Washers

What is a Bonded Sealing Washer?

A bonded sealing washer is a highly specialized, composite fastener engineered with a heavy-duty galvanized backing and a permanently attached, compressible rubber base. Designed to sit directly under the head of a bolt or nut, these unique washers act as an essential cushion and highly effective barrier that completely prevents leakage and reliably seals critical joints. Manufactured utilizing a variety of premium, industrial-grade materials, they deliver exceptional weatherproofing and structural protection across a wide range of demanding environments.

Design Features and Outdoor Applications

Because they seamlessly combine the strength of metal with the resilience of rubber, bonded sealing washers offer several critical advantages for outdoor and sensitive assemblies:

• Leak Prevention and Sealing: As the fastener is tightened, the integrated rubber base compresses against the mating surface, creating a secure, watertight, and airtight seal that actively prevents fluid leakage and protects the joint from environmental ingress.
• Fragile Material Protection: While the galvanized steel provides exceptional structural backing, the soft, resilient rubber cushion expertly absorbs high clamping pressure. This allows them to be safely used on fragile, thin, or easily marred materials without causing crushing or surface damage.
• Maximum Corrosion Resistance: Typically utilized in harsh outdoor environments, roofing, and HVAC assemblies, the rugged galvanized finish combined with the weatherproof rubber heavily protects the underlying fastener and structural joint from severe, moisture-induced corrosion.

Request a Quote Today

Have a question about our manufactured bonded sealing washers or need help determining the best size for your outdoor sealing application? Contact our team by using our secure online form to submit your project details. You can also give us a call today to speak directly with our fastener specialists. We look forward to speaking with you!