Sika Hyflex 250 Facade is a 1-component, moisture-curing, low-modulus elastic joint sealant.
CHARACTERISTICS / ADVANTAGES
– Excellent weathering resistance
– Bubble-free curing
– Low stress to the substrate
– Perfect extrusion and workability
– Excellent adhesion to many different substrates
– Very low emissions
For all our Sika products on our website, please click here.
Any further information you may need on Sika / Everbuild products, please visit their website here.
This product is a non-stock item and extended lead times are advised
Sika Hyflex 250 Facade is designed for the elastic joint sealing and waterproofing of movement and connection joints in buildings. Due to its very low modulus, it is also suitable for EIFS Facades.
Substrates must be clean, dry and homogeneous, free from oils, grease, dust and loose or friable particles. The product adheres without primers and/or activators. However, for optimum adhesion and critical, high-performance applications, such as highly stressed joints & extreme weather exposure or water immersion, the following priming or pre-treatment procedures shall be followed:
Before applying the sealant, allow a flash-off time of > 15 minutes (< 6 hours). However, metals such as copper, brass and titanium-zinc have to be cleaned. Using Sika Aktivator-205, wipe the solution on with a clean cloth or towel. After the recommended flash-off time, use a clean brush to apply Sika Primer-3 N and then allow additional flash-off time of > 30 minutes (< 8 hours) before sealing the joints.
Cement based renders, concrete, aerated concrete and bricks need to be primed using Sika Primer-3 N. Clean off any dust with a dry brush & then apply the primer with a separate brush. Allow a flash off time of 30minutes to 8 hours before sealing.
For more advice and instructions, please contact Sika Technical Services.
Note: Primers help with improving adhesion. They do not substitute for the correct cleaning of a surface & they do not enhance the strength of the surface significantly.
The sealant is ready to use. After the necessary surface preparation, insert a backing rod to the required depth and apply any primer if needed. Furthermore, insert a foil pack into the sealant gun and apply sealant into the joint, making sure that the sealant comes into full contact with the sides of the joint and avoids any air entrapment.
All tools and equipment should be cleaned immediately after use with Sika® Remover-208 and/or Everbuild Wonder Wipes. Once set, residual material can only be removed mechanically.
Sika Hyflex 250 Facade can be painted with a number of facade coatings. However, it is advised you carry out preliminary trials to check.
– Colour variations may occur due to exposure to chemicals & high temperatures. However, a change in colour is pure of aesthetic nature and does not influence the technical performance.
– Before using Sika Hyflex 250 Facade on natural stone, please refer to Sika Technical Service for advice.
– Do not use Sika Hyflex 250 Facade on bituminous substrates, natural rubber, EPDM rubber or on any building materials which might bleed oils, plasticisers or solvents.
– Do not expose uncured Sika Hyflex 250 Facade to alcohol-containing products as this may interfere with the curing reaction.
For an application gun, click here. For larger foils, click here.
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