We help manufacturers solve one of the most common problems in product design: keeping moisture, dust and contaminants out — reliably, repeatably and at scale. Using automated, precision-dispensed Sonderhoff (Henkel) reactive polymer systems, we apply seals, gaskets and protective encapsulation directly onto your parts, exactly where you need them — from prototype to high-volume series production.

Problems we solve

Water getting into an outdoor enclosure. A control box that fails its IP test. Electronics that can't survive vibration, humidity or heat. A gasket that won't sit right on a complex shape. A bonding or sealing step that's slow, messy or inconsistent by hand. We turn these into a clean, automated, repeatable process.

What this means for your product (Benefits)

• Ingress protection you can certify — sealing levels up to IP65, IP67 and IP69K for enclosures, housings and electronic assemblies.
• Protection against the real world — moisture, dust, vibration, chemicals, UV and temperature extremes.
• A seal that fits perfectly, every time — foamed in place to follow any contour, with no pre-cut gaskets to source, store or misalign.
• Longer product life — encapsulation and potting that shield sensitive electronics and connectors from failure.

High-precision Sonderhoff mixing head dispenses reactive polymers directly onto the component

Our material range — the right chemistry for every requirement

We work with the full Sonderhoff material platform, built on polyurethane, silicone and PVC chemistries. Each can be tuned for hardness, flow, cure speed and colour, so we match the material precisely to what your part has to do.

• Sonderhoff FERMAPOR K31 — Polyurethane foam seals. Our workhorse for sealing. A two-component, room-temperature-reacting polyurethane system that foams a flexible seal directly onto the part using FIPFG (Formed-In-Place-Foam-Gasket) technology. Ideal for enclosure, control-box and luminaire seals indoors and out — the soft foam follows any contour for a perfect fit.
  Video: Excellent compression recovery and elasticity of Sonderhoff FERMAPOR K31 polyurethane foam gasket

Engineered-in protective properties. The chemistry itself can be specified to solve compliance and safety challenges: low-emission formulations for low indoor-air VOCs, antifungal or antibacterial properties, and flame retardancy to UL 94 V-2 for sealing foams or UL 94 V-0 for adhesive sealants.

Sonderhoff SMART-L dosing cell with integrated conveyor belt for high-efficiency series production

What we seal, bond and pot — real parts, real problems solved

If your product has to keep water, dust or air where it belongs — or protect electronics from the environment — chances are we can help. Here's where our sealing, bonding and potting capability is used every day:

• Electronics & electrical enclosures: Control cabinets and switchgear, distribution boxes (plastic and stainless steel), ATEX-rated panels, ATMs, and outdoor electrical housings. If you're trying to stop water and dust getting into an electrical box, pass an IP test, or replace a fiddly rubber gasket that never sits right — this is the fix.
• Lighting: Indoor and outdoor luminaires, linear and street lamps, illuminated signs, and LED potting. For lights that have to survive rain, sprinklers, dust and temperature swings without fogging or failing.
• Automotive & e-mobility: Headlamps, rear and third brake lights, displays, ultrasonic parking sensors, door modules, and EV/e-bike/e-scooter battery housings and packs. Sealing and potting that survives vibration, moisture and heat under the hood and in the battery.
• EV charging infrastructure: Charging stations, wallboxes and charging connectors. Weatherproof sealing and potted connectors for equipment that lives outdoors and gets handled constantly.
• Home appliances: Dishwasher dispensers and sumps, washing-machine and dryer worktops and control panels, oven and microwave glass-door bonding, glass-ceramic hobs, and washing-machine rear walls. Leak-proof seals and strong glass-to-metal bonds for wet, hot, vibrating environments.
• HVAC & air filtration: HVAC housings, plate heat exchangers, panel and V-filters, HEPA filters, and foamed filter frames. Tight seals so only the air that should pass through actually does — and lighter, lower-cost filter bonding.
• Consumer & robotics: Vacuum cleaner housings, robotic lawn-mower battery housings, loudspeakers, and electric motors. Sealing small devices against dust and moisture, plus acoustic and motor sealing.
• Cable, connectors & packaging: Cable grommets, foam-molded parts, connector and electronics potting, and sealed metal/plastic packaging (drop-test ready). Strain relief, water-tight cable entries, and packaging that protects what's inside.
• Solar & energy: PV inverters and solar-power electronics. Potting and sealing that protects power electronics from the elements for decades.
• Caravan, camper & printing: Recreational-vehicle components and print-industry parts. Custom sealing and bonding wherever a precise, in-place seal beats a pre-cut gasket.

Don't see your part? If it needs to be sealed, glued or protected from water, dust, heat or vibration, send us a drawing or a sample — we'll tell you the best way to make it tight.

One partner, the whole part

Sealing and protection sit within a broader in-house capability. We also offer injection / die casting, vacuum metallizing, vacuum forming, rotational molding, ultrasonic welding, pad printing and full assembly — letting you consolidate molding, finishing, protection and assembly with a single supplier and a shorter supply chain.