Polyurethane and Silicone Sealing Foam
For Maximum Tightness and Efficiency
Our sealing foam and elastomer gaskets based on polyurethane and silicone reliably protect your components against moisture, dust, and chemical exposure. Applied directly using state-of-the-art FIPFG and FIPG technology, the foam seal ensures perfect adhesion, fast processing, and long-term durability. Benefit from custom-engineered sealing systems that accelerate your production processes and consistently safeguard product quality.
Properties and Functions
- Perfect Fit: The sealing foam adapts precisely to the geometry of your component.
- Exceptional Resistance: Reliable protection against moisture, chemicals, dust, and extreme temperatures.
- Automated Processing: The sealing foam is applied in a highly precise, process-stable system, ensuring consistently high quality at high cycle rates and large production volumes.
- Meets stringent flame resistance and burning behavior requirements in accordance with UL 94 and FMVSS 302.
- Material Versatility: Polyurethane foam or silicone foam for every requirement, plus customized elastomer gaskets.
How sealing foam is created
RAMPF sealing foam is not installed as a pre-formed profile but applied directly onto your component. This eliminates assembly steps and creates a seamless seal without joints, ensuring consistently high quality and reliable performance.
FIPFG: Foamed seal applied directly to the component
In the FIPFG process (Formed-in-Place Foam Gasket), a dispensing system applies the liquid or thixotropic sealing foam precisely along the sealing contour. The material then expands and cures into an elastic, seamless seal. This enables the sealing foam to adapt accurately to complex geometries while compensating for component tolerances.
FIPG: Compact Seal Without Foaming
In the FIPG process (Formed-in-Place Gasket), the seal is also applied directly to the component, but as a compact, non-foamed sealing material. Compared to FIPG seals, foamed FIPFG seals offer greater compressibility and improved tolerance compensation. We will work with you to determine which process is best suited to your application.
Material and Dispensing Technology from a Single Source
RAMPF develops not only the sealing materials themselves, but also the automated mixing and dispensing systems used for their processing. This combination of material expertise and process know-how ensures high process reliability and manufacturing efficiency, whether through standard solutions or customized formulations tailored to your production environment.
Your Key Benefits
Applications for sealing foam
RAMPF sealing foams protect components across a wide range of industries, from battery housings and lighting systems in the automotive and e-mobility sectors to control cabinets, lighting, household appliances, and packaging for chemicals and food products.
Applications
Material Types: PU or Silicone Sealing Foam?
Which sealing foam is the right choice depends primarily on temperature requirements, media exposure, and the installation environment. RAKU® PUR polyurethane sealing foam is suitable for long-term use at temperatures from -40 to +105 °C and offers excellent compression set properties and low water absorption. RAKU® SIL silicone sealing foam provides long-term temperature resistance from -60 to +200 °C, making it the ideal solution for extreme environments.
Area of application
Temperature resistance, long-term: from -40 to +105°C; short-term: +140°C
Chemical resistance to fats and oils, detergents, aqueous solutions, etc.
Properties
Outstanding physical properties such as compression set, tensile strength, elongation at break, etc.
Low water absorption
UV-resistant formulations possible
Adhesion
Excellent adhesion to a wide variety of substrates
Coordinated pre-treatment systems available
Structure
Compression rate: 30 – 60%
Flame retardancy
UL 94, FMVSS 302
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Area of application
Temperature resistance, long-term: from -60 to +200 °C; short-term: +250 °C
Exceptional chemical resistance for extreme environments
Properties
Optimum physical properties such as compression set across the entire application temperature range
Extremely water-repellent
Excellent UV resistance
Adhesion
Outstanding adhesion to a wide variety of substrates
With pre-treatment if necessary
Structure
Compression rate: 10 – 50%
Flame retardancy
UL 94. FMVSS 302
Mehr erfahren!
Find here more information on processing diisocyanates according to REACH, Annex XVII, Entry 74:
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FAQ
FIPFG (Formed-In-Place Foam Gasketing) is an automated sealing process where a reactive polyurethane or silicone material is dispensed directly onto a component. The material then foams and cures in place, creating a seamless, custom-fit gasket. RAMPF's FIPFG systems offer precision bead placement, fast tack-free times, and consistent sealing performance across high-volume production.
FIPFG eliminates the inventory, waste, and fit issues associated with pre-cut gaskets. Because the gasket is applied directly to the component contour, it conforms perfectly to complex geometries. RAMPF's systems enable rejection rates below 1%, faster cycle times, and significant material savings versus traditional die-cut solutions.
For EV battery housings, RAMPF recommends its polyurethane-based FIPFG sealing systems, which provide robust moisture and dust ingress protection across temperature cycling conditions. These systems can be integrated directly into automated assembly lines and deliver consistent, repeatable seals with high throughput.
Polyurethane foam gaskets applied via formed-in-place foam gasket (FIPFG) offer excellent compression recovery and long-term elasticity, making them ideal for HVAC filter housings. RAMPF's material formulations maintain sealing integrity across wide temperature ranges and resist environmental degradation, extending service life compared to pre-formed gasket alternatives.
RAMPF's formed-in-place foam gasket (FIPFG) systems provide reliable IP-rated sealing for industrial and outdoor lighting housings. Polyurethane (PU) foam systems with fast cure profiles can be integrated into continuous production lines, ensuring tight seals that resist UV exposure, humidity, and mechanical vibration.
RAMPF's FIPFG dispensing systems can be integrated with robotic or gantry automation to seal packaging lids with high repeatability. The dispensing head follows the component contour precisely, applying foam gasket material in a single pass. This replaces manual gasket insertion, reduces labor costs, and improves consistency.
RAMPF's polyurethane (PU) and silicone foam gasket systems are engineered to meet IP54, IP65, and IP67 requirements for electrical enclosures, filter housings, and industrial electronics. The compression ratio (typically 30–60% for PU foam) and material selection determine the final ingress protection performance.