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Home » Blog » Energy » Solar energy » DOWSIL 7094: Sealant for solar and photovoltaic panels

The photovoltaic (PV) market continues to grow and the demand for photovoltaic modules is increasing more and more. In this context, MD Poland is always careful to offer the best solutions thanks to decades of collaboration with the best brands of industrial adhesives and sealants.

DOWSIL 7094 fluid sealant has been specially formulated to offer a protective, durable and decorative solution in the construction and photovoltaic (PV) solar panel industry. This sealant is characterized by high durability, high safety and remarkable flexibility, which are key requirements in such applications. Due to its high temperature and UV stability, it can be used both internally and externally.

DOWSIL 7094 can be applied by brush, trowel or spray, providing excellent repair of PV modules with backsheet degradation and backsheet protection applied during production. The backsheet, located at the base of the photovoltaic solar panel, forms the final layer and is generally made of polymers or combinations of polymers.

DOWSIL 7094 Fluid Sealant – Silicone Protective Coating.

DOWSIL 7094, a sealant for solar and photovoltaic panels, cures under ambient conditions, transforming into a highly durable elastomer. It creates chemical adhesion and acts as an electrical insulator. After curing, DOWSIL 7094 restores insulation and provides reliable protection against the ingress of water and ultraviolet light.

Silicone sealants are distinguished by their outstanding durability, proven for more than 50 years under outdoor conditions. Therefore, DOWSIL 7094 represents a reliable and long-term repair solution.

Features and Benefits

  • Reliable filling of backsheet cracks, including the deepest ones;
  • Restoration of electrical insulation;
  • Application possible by brush or spray on site, without the need to disassemble the unit;
  • Good adhesion on coextruded polyamide (“AAA”) and other common types of backsheets, such as those with PVF, PET or PVDF outer layer;
  • Short cure times;
  • Excellent strength for extended service life.

Specific properties for photovoltaic applications

DOWSIL 7094 fluid sealant has been specially developed for use in solar modules for two main purposes:

  • Repair of backsheets with signs of cracking;
  • Prevention on modules with backsheets prone to common cracking.

Its easy application can be done in the workshop or on site, even on modules already installed with the backsheet facing down. In this regard, the following steps are recommended:

  1. Thoroughly clean the surface of the backsheet. The cleaning procedure will depend on the type of dirt and the degree of degradation of the backsheet. In general, it is recommended to clean the surface with a damp cloth followed by a dry cloth;
  2. Apply DOWSIL 7094 fluid sealant using a trowel, brush or spray gun;
  3. Immediately level the applied layer with a trowel, applying light pressure to allow the sealant to penetrate into the cracks
  4. Allow the sealant to harden.