The transportation industry has embraced the use of fuel cells to produce hydrogen-combustion engines offering longer range than the standard EV vehicle which does not require charging - saving time and infrastructure costs for both manufacturer and consumers alike

Hernon is proud to offer our lines of products to assist you in joining the growing number of manufacturers who have embraced this new technol­ogy to provide a safer, cleaner environment while reducing carbon emissions worldwide.

Fuel Cell Product Guide

ADHESIVE & SEALANT PRODUCTS

Tuffbond® 394
Tuffbond® 394 is a single component, high temperature resistant, heat activated epoxy. It cures to a high-performance thermoset system with excellent adhesion properties to a wide variety of substrates. Tuffbond® 394 will change from amber-yellow to a reddish brown upon cure. Bonding the voice coil to the cone has been a challenge for engineers, specifically when the adhesive temperature resistance requirement is above 200°F (93°C). Two component epoxy was commonly used for this application, but limitations such as mixing ratio, cure speed, potential solidification in equipment and the need for equipment flushing solvents have made Tuffbond® 394 more practical.

Silastomer 336
Silastomer® 336 is a high performance, single component, acetoxy, ready to use silicone. It has a paste-like consistency, which cures to a tough, resilient and durable silicone rubber when exposed to moisture in the air. Since it will not flow of its own weight, Silastomer® 336 can be applied to vertical, horizontal and overhead joints without sagging or running off. It will adhere to clean metals, glass, most types of wood, silicone resin, vulcanized silicone rubber, natural and synthetic fiber, ceramic, many plastics and painted surfaces. Silastomer® 336 provides excellent resistance to moisture, weathering, vibration, ozone and extreme temperatures. It can be applied in surface temperatures of 0°F to above 120°F with no loss in performance. Fully cured Silastomer® 336 can withstand extended periods at temperatures up to 400°F.

HPS - HERNON POROSITY SEALANTS
HPS - HERNON POROSITY SEALANTS is the solution to leak proof parts, improving machinability, in addition to increasing the durability and surface quality for painting and plating. HPS is also excellent for sealing leak paths in rigid electronic assemblies. The hardened resins exhibit superior chemical resistance and elevated temperature stability. Sealed powdered metal parts exhibit better machinability, enhanced tool life and better dimensional control

HPS 990
Porosity Sealant (HPS) 990 is the solution to leak proof parts, improving machinability, in addition to increasing the durability and surface quality for painting and plating. HPS 990 is also excellent for sealing leak paths in rigid electronic assemblies. The hardened resins exhibit superior chemical resistance and elevated temperature stability. The microscopic voids, where potential leaks occur in the part are filled by the low viscosity resin during vacuum application. Sealed micropores cure without shrinkage to form tough cross-linked thermoset polymer, permanently sealing the piece. Excess residual adhesive is washed from the part surface during rinsing with water. The parts leave the impregnating process without surface residue and can then be used in production within a few short hours. The resin polymerizes, sealing gaps in any assembly. This protects electrical components against leakage from air, water, coolants and oils. When used in preparation for plating or painting processes, the impregnation process also eliminates absorption of plating materials (like acids) or painting prep solvents that could otherwise later bleed out of pores causing finishes to discolor, bleed, pit or peel. Sealed powdered metal parts exhibit better machinability, enhanced tool life and better dimensional control.

HPS 994
Porosity Sealant (HPS) 994 is the solution to leak proof parts, improving machinability, in addition to increasing the durability and surface quality for painting and plating. The hardened resins exhibit superior chemical resistance and higher temperature stability. The microscopic voids, where potential leaks occur (between metal grains or ceramic plastic molecules) in the part are filled by the low viscosity resin during vacuum application. Sealed micropores cure without shrinkage when exposed to elevated temperature to form tough cross-linked thermoset polymer, permanently sealing the workpiece. Residual adhesive film is water-washed from the part surfaces during rinsing. The parts leave the impregnating process without surface residue and can then be used in production immediately. When used in preparation for plating or painting processes, the impregnation process also eliminates absorption of plating materials (like acids) or painting prep solvents that could otherwise later bleed out of pores causing finishes to discolor, bleed, pit or peel. Sealed powdered metal parts exhibit better machinability, enhanced tool life and better dimensional control.

HPS Porosity Sealant 41814 W/O Activator
Porosity Sealant (HPS) 41814 is the solution to leak proof parts, improving machinability, in addition to increasing the durability and surface quality for painting and plating. The hardened resins exhibit superior chemical resistance and elevated temperature stability. The microscopic voids, where potential leaks occur (between metal grains or ceramic plastic molecules) in the part are filled by the low viscosity resin during vacuum application. Sealed micropores cure without shrinkage when exposed to elevated temperature to form tough cross-linked thermoset polymer, permanently sealing the workpiece. Residual adhesive film is water-washed from the part surfaces during rinsing. The parts leave the impregnating process without surface residue and can then be used in production immediately. When used in preparation for plating or painting processes, the impregnation process also eliminates absorption of plating materials (like acids) or painting prep solvents that could otherwise later bleed out of pores causing finishes to discolor, bleed, pit or peel. Sealed powdered metal parts exhibit better machinability, enhanced tool life and better dimensional control.

HPS 59801
Porosity Sealant (HPS) 59801 is a low viscosity liquid sealant designed for sealing interfacial leak paths in flexible electronic assemblies. It may also be used to enhance dielectric strength or seal porosity in passive materials. The dual-cure system incorporated in HPS 59801 offers the advantage of elevated temperature curing or curing at room temperature. HPS 59801 is typically applied with a vacuum impregnation process that removes air from the internal void and then saturates the part with liquid sealant. In the absence of circulating air, the liquid rapidly polymerizes to form a tough, flexible, thermoset polymer that permanently seals gaps in the assembly. Excess liquid sealant is rinsed from the outside of the part with an aqueous solution effectively leaving no surface build up. Parts processed with HPS 59801 are sealed internally but remain cosmetically and dimensionally unchanged. Typical applications include sealing or unitizing over-molded electrical components against leakage of air, water, coolants, oils and other fluids. As a good insulator, HPS 59801 may also be used to improve the dielectric strength across gaps between high voltage conductors.

HERNON POROSITY SEALANT SURFACTANT 381001 
Hernon® Porosity Sealant (HPS) Surfactant 381001 is a single component product designed to be used as wetting agent.

Hernon Manufacturing, Inc.
Hernon Manufacturing, Inc.® has been committed to delivering TOTAL SOLUTIONS including high-performance adhesives, sealants and coatings as well as precision dispensing equipment and UV curing systems for over four decades. A long-time member of Central Florida’s industrial manufacturing community, Hernon Manufacturing provides solutions for a variety of industries including: Energy and Power Generation, Medical, Electronics, Electrical, LED, Automotive, Appliances, Sporting Goods, Ammunition, Communications, Aerospace, Aviation, High Tech Audio, Defense, Fire Suppression, Transportation, Marine Manufacturing and more all with products proudly made in the United States. Hernon Manufacturing, Inc.® is proud to export to over sixty nations worldwide and is an ISO-9001:2023 registered company whose products meet or exceed Mil-Specs.