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This guide is for professional tradespeople and DIY enthusiasts seeking a durable, high-performance silicone sealant for a wide range of applications. The Everbuild SIKASIL 825LMWE Silicone offers excellent weather resistance and high elasticity for reliable sealing of external and internal joints. A key consideration is its 12-month shelf life, requiring timely use after purchase.
| Colour | White |
|---|---|
| Model Part Number | Sikasil 825 |
| Brand | Everbuild |
SIKASIL 825LMWE is an alcoxy-cure silicone sealant specifically formulated for high-performance sealing. It offers excellent UV and weather resistance, high movement capability (±35%), and low dirt pick-up, making it suitable for demanding external and internal applications where durability and appearance are important.
The curing time varies with temperature and humidity. It forms a skin in 30-45 minutes. Approximately 2 mm cures in 1 day, 6 mm in 3 days, and 9 mm in 7 days under standard conditions (+23 °C and 50% relative humidity).
No, silicone sealants, including SIKASIL 825LMWE, cannot typically be painted over. Paint will not adhere effectively to the silicone surface.
The shelf life is 12 months from the date of manufacture, provided it is stored in its original unopened container in cool, dry conditions between +5 °C and +25 °C.
While it has good weather resistance, SIKASIL 825LMWE is primarily designed for construction and glazing. For specific sanitary applications where mould resistance is paramount, a dedicated sanitary silicone sealant may be more appropriate. However, it is CE marked for sanitary applications (EN15651-3).
SIKASIL 825LMWE has a movement capability of ±35% according to ISO 11600 (F 25LM and G 25LM) and Class 35 according to ASTM C719. This means it can accommodate up to 35% of the joint width in expansion or contraction without failing.
Yes, SIKASIL 825LMWE is suitable for sealing soft metals such as lead, copper, and zinc due to its non-corrosive properties.
Ensure the cartridge plunger is fully engaged and the nozzle is cut to an appropriate size. Check that the sealant gun is functioning correctly.
Verify that the surface is clean, dry, and free from dust, grease, or contaminants. Ensure the ambient temperature is within the recommended application range (+5 °C to +40 °C).
Work in smaller sections and tool the sealant immediately after application (within 10-15 minutes) to achieve a smooth finish.
Check storage conditions. If stored below +5 °C or above +25 °C, performance may be affected. Ensure proper ventilation and that the joint is not excessively wide for the ambient humidity and temperature.
While designed for low dirt pick-up, heavy environmental contamination can still occur. Clean gently with a damp cloth. For persistent dirt, consider using a mild detergent solution.
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