DryFiX BPU SEAL 2K: Polyurethane Expansion Joint Sealant

Expansion joint sealant is a high-performance insulation and filling material specifically designed for areas where structural movements such as expansion, contraction, and vibration frequently occur. This specialized product offers long-lasting performance by combining superior elasticity with strong mechanical durability, helping to enhance the safety and lifespan of structures.

Thanks to its highly elastic formulation, the sealant maintains its physical integrity within a wide temperature range from -40°C to +86°C. Even under extreme environmental conditions, it continues to perform without cracking, breaking, or deforming. This makes it especially suitable for outdoor applications exposed to harsh climates. Its self-leveling structure reduces the need for additional labor during application, ensuring that the material spreads evenly across the surface and creates a smooth, uniform, and aesthetically pleasing finish.

One of its key advantages is its cold application capability, which eliminates the need for heating during use. This not only saves time but also makes the application process safer and more practical. The product can be easily applied in both horizontal and vertical joints, making it a versatile solution suitable for a wide range of construction details and surface types. It provides strong adhesion to common construction materials such as concrete, stone, and marble, ensuring long-term performance.

In addition, the sealant demonstrates high resistance to abrasion, tearing, mechanical stress, and various chemicals. Its durable structure allows it to withstand heavy-duty conditions, making it ideal for use in demanding environments. For this reason, it is widely preferred by professionals in applications such as parking lots, terminal ramps, airport runways, industrial flooring, and building expansion joints where constant movement and load are present.

Advantages

The product features a two-component system that allows for controlled and consistent mixing. Combining the components at a 2:1 ratio by volume simplifies the preparation process and helps achieve a homogeneous mixture while minimizing application errors. Its fast curing property ensures that the applied surface becomes ready for use in a relatively short time.

The ability to maintain elasticity across a wide temperature range makes it reliable in various climatic conditions. Its self-leveling nature allows for effortless application and results in a smooth surface finish. The cold application feature eliminates the need for additional heating equipment, reducing both labor and operational costs.

The sealant offers excellent resistance to wear, making it suitable for high-traffic areas. It adheres strongly to a wide variety of surfaces, whether primed or unprimed, providing flexibility in different application scenarios. Although thinning is not typically required, viscosity can be adjusted when necessary using a suitable polyurethane thinner.

Its resistance to low temperatures ensures that the film maintains flexibility even at -40°C. The material has outstanding mechanical properties, including high elongation capacity, tensile strength, and resistance to tearing and abrasion. Furthermore, it provides strong resistance against chemical exposure, making it suitable for industrial environments.

Application Areas

This sealant is suitable for use in expansion joints in a wide range of areas, including parking garages, shopping centers, bridge connections, airport runways, terminal ramps, industrial facilities, and residential projects. It is particularly effective in environments exposed to heavy pedestrian and vehicle traffic, where long-term durability is essential.

Warnings and Recommendations

During application, all necessary occupational safety precautions should be taken. Flammable and combustible materials must be kept away from the application area, and smoking should be strictly avoided. Adequate ventilation must be ensured in the working environment at all times.

It is recommended to use personal protective equipment such as safety goggles and gloves during application. In case of contact with eyes, rinse immediately with plenty of water and seek medical attention if necessary. For more detailed safety information, refer to the Material Safety Data Sheet (MSDS).

The product should be stored out of reach of children and must be used only by professional users with sufficient technical knowledge, following the instructions provided in the technical documentation.

Application Instructions

Surface Preparation

The application surface must be clean, dry, and structurally sound. If possible, it should be cleaned using a high-pressure washer to remove oil, grease, fuel residues, paraffin, and other contaminants. Cement residues, loose particles, and old coatings must also be completely removed.

Priming

For absorbent surfaces, the use of a suitable primer is recommended. For hard and smooth surfaces, an appropriate primer should be selected based on the substrate type.

Mixing

The two components should be mixed using a low-speed mixer until a homogeneous consistency is achieved. Once mixed, the material should be applied immediately without delay. At an ambient temperature of 20°C, the pot life of the mixture is approximately 30–45 minutes.

Application

A polyethylene backer rod of appropriate size should be placed into the prepared joint. The width-to-depth ratio should be maintained at 2:1. The sealant is then poured into the joint, ensuring adhesion only to the two opposing side surfaces. Adhesion to the bottom surface must be avoided.

After application, the surface should be smoothed using a suitable spatula, and masking tapes should be carefully removed. The material must be protected from water, rain, and external factors until fully cured. Curing time may vary depending on ambient temperature conditions.

Storage

The product can be stored for at least 12 months in its unopened original packaging, in dry conditions at temperatures between 5°C and 25°C.

Technical Properties

Density: 1.05±0.05 g/cm³Hardness: 35±5 Shore AViscosity: 3500–4000 cPSolid Content: 85%Elongation: 1500%Full Cure Time: 7 days

Note: These values are based on tests conducted at 23°C and 50% relative humidity. Results may vary under different environmental conditions.