STP elastic adhesive for assemblies in the automotive sector

Sikaflex-552 AT is a single-component elastic adhesive based on silane terminated polymer technology (STP) particularly suitable for the assembly of large elements in the automotive industry. Sikaflex-552 AT is suitable for bonding coated metal, fiberglass, ceramic and plastic materials. Sikaflex-552 AT exhibits good adhesion to multiple substrates even with minimal pretreatment..  

• Good adhesion without primer on a wide variety of substrates
• Free of isocyanates and solvents
• Paintable

BENEFITS:

• Good adhesion without primer on a wide variety of substrates
• Free of isocyanates and solvents
• Paintable
• Also suitable for high dynamic stresses
• Resistant to aging and atmospheric agents

USES:

Sikaflex-552 AT is suitable for joints subjected to dynamic stress. Suitable substrates are materials such as metals, in particular aluminum, primed metals, painted surfaces, steel sheets, ceramic and plastic materials. Sikaflex-552 AT exhibits good adhesion to multiple substrates even with minimal pretreatment. Seek manufacturer's advice before using Sikaflex-552 AT on materials prone to stress cracking. To avoid stress cracking phenomena, carry out preliminary tests with the original materials. This product is exclusively intended for use by personnel with the necessary experience. To ensure adhesion and compatibility of materials, carry out preliminary tests with the substrates in real conditions..  

SURFACE PREPARATION:

The adhesion surface must be clean, dry, free of oils, greases and impurities. Surface pretreatment depends on the specific nature of the substrates and is crucial for a durable bond. Refer to the Sika Table of valid primers for information on pre-treatment of the surface. The information contained therein is based on experience and must in all cases be verified by carrying out tests with the materials in real conditions..

APPLICATION:

Sikaflex-552 AT can be processed between 5 C and 40 C taking into account the variations in reactivity and application properties. The optimum temperature for substrate and sealant is between 15C and 25C.5 °C.

Take into account the increase in viscosity at low temperatures. For easier processing, bring the product to room temperature.

Apply Sikaflex-552 AT with a suitable gun for cartridges or tubular bags or pumping equipment. For advice on how to select and set up a suitable pumping system contact Sika Industry's System Engineering department..

In hot and humid climatic conditions the skin time is considerably shortened. Always press the elements within the skin time. Once the skin is formed, do not press any more.