Application of Polyurethane Gaskets and Two-Component Adhesives in HVAC and AHU Systems

Modern heating, ventilation, and air conditioning systems (HVAC), as well as air handling units (AHU), set high requirements for tightness, energy efficiency, and reliability. To achieve these parameters, polyurethane gaskets and two-component adhesives are used.

Polyurethane coatings provide excellent priming of car body elements, covers, filters, and panels. They are characterized by high flexibility, rigidity, and resilience, withstand temperature tests and official quality inspections.

They are pre-protected against damage occurring after renovation and against corrosion of body elements, including decompression, ventilation, and air conditioning systems. Our polyurethane foams are typically characterized by very good adhesion and coating durability.

For greater durability and improved adhesive properties, the materials are adapted to the latest advances in production. RAMPF materials are used in various air cooling, ventilation, and air conditioning systems. We can also select RAMPF two-component polyurethane sealants according to the requirements of your equipment — in terms of gap height, hardness, and adhesion properties. The mixed structure ensures low closing force when installing the foam gasket. The gasket compensates for manufacturing tolerances and shows high thermal stability under temperature fluctuations.

Repeated opening and closing of the housing panels of heating, ventilation, and air conditioning systems, as well as service doors, is possible while maintaining a constant sealing effect

Thanks to their excellent recovery capability, the cellular structure of the polyurethane gasket maintains its elasticity even after many years (tested in accordance with DIN EN ISO 1856). This allows for repeated opening and closing of service flaps and HVAC unit doors during maintenance while maintaining stable sealing performance.

Application examples

AHU Systems
In air handling units, especially those intended for outdoor applications, it is crucial to select the right type of seal to ensure long-term protection of the equipment against air leakage.
Thanks to its excellent adhesion, the RAMPF polyurethane foam gasket performs this task perfectly compared to self-adhesive seals.

HVAC Systems
In outdoor equipment, especially in high-humidity environments, it is crucial to choose the right type of seal to ensure long-term protection of the equipment against moisture and dust ingress.
Thanks to its low hygroscopicity and antifungal additives, the RAMPF polyurethane foam sealant perfectly fulfills this task

Fire Dampers
In the production of fire dampers, our technology is used for sealing inspection hatches, ensuring high tightness and durability of the gasket, as well as facilitating its installation.

Access Panels
An important component of ventilation systems are inspection valves. Equally important is the proper, joint-free gasket that ensures airtightness — especially in systems intended for medical applications, where ventilation system validation is required.
Our gasket application technology enables hermetic sealing of access openings.

Control Cabinets
An essential element of HVAC/AHU systems is the sealing of control cabinets, which protects them from moisture and dust ingress.

Filter Production
In filter manufacturing, adhesive technologies play a key role in ensuring a tight bond between the filter media and the housing, as well as in the precise application of sealant that guarantees airtight adhesion.
Our equipment provides reliable solutions for these tasks, and our technologists will help you select the appropriate materials for your specific production process.

Two-component adhesives are used for the permanent bonding of panels, metal and plastic elements, as well as for the installation of filters and sound-absorbing components. They ensure bond durability and resistance to vibrations. Thanks to these materials, devices operate without loss of tightness, prevent air leakage, and guarantee stable performance throughout their service life.

Technological challenges

Proven quality standards

Engineer support and technical assistance

Advanced process control

Less waste, higher efficiency

Accurate dosing and control

Compliance with industry requirements

Seamless contour without gaps or joints

PU foam does not age like rubber

Uniform density and profile in every batch

Elasticity in dynamic conditions

Contour applied directly onto the product

From soft and flexible to more rigid gaskets

Quick change between product types

High humidity, chemical exposure, dusty environments

Smooth, aesthetic seam instead of glued rubber

A “premium” product that works reliably for years

Technology comparison table

Criterion	Our Solutions: Polyurethane Gaskets + Two‑Component Adhesives	Other Solutions (Rubber, One‑Component Adhesives, Mechanical Fastening)
Sealing	100% tight fit, elimination of air leaks	Lose shape over time, possible gaps and leaks
Durability	Retain elasticity and strength for over 10 years	Rubber dries out, one-component adhesives lose strength
Temperature resistance	Operating range from –40 °C to +90 °C without loss of properties	Limited range, brittleness in cold or softening in heat
Vibration resistance	Elastic joints, vibration damping	Mechanical fasteners loosen, noise and cracks appear
Energy efficiency	Minimal heat loss, reduced heating/cooling costs	Air leaks increase energy consumption
Maintenance	Minimal need for repairs and replacement of parts	Frequent seal replacement, tightening of fasteners
Ecology	Reduced energy consumption and CO₂ emissions, compliance with modern standards	Higher operating costs and energy losses
Cost of ownership	Lower due to longevity and energy savings	Higher due to frequent maintenance and air leaks

Application in practice

Examples of applied materials

Rampf

Kleiberit

MAE-TECH solutions

Our dosing systems are designed to meet the requirements of various processes — from small-batch production to fully automated industrial lines. Thanks to their modular design, we offer solutions tailored to customer needs in terms of performance, precision, and flexibility.