Everbuild Silicone 825 - Cream - 380Ml

This is a low modulus, neutral curing silicone sealant based on a filled alkoxy curing system. It ...

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Power Tools DirectSikasil Sika -825 Silicone Sealant Magnolia 380 Ml
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AmazonSika Sikasil 825 Silicone Sealant, Magnolia, 380 ml
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Product Information

Full details

The Everbuild Silicone 825 in Cream is a low modulus, neutral curing silicone sealant designed for expansion joints in masonry and perimeter pointing around window and door frames. Its key benefit is excellent adhesion to a wide range of materials and superior weatherproofing, making it ideal for both internal and external applications. A potential caveat is its long skinning time, which requires careful tooling for a professional finish. This sealant is flexible, non-slump, and suitable for joints up to 50mm wide.

All features

ColourCream
BrandEverbuild

Extended Product Information

FAQs

What is the primary use for Everbuild Silicone 825?

It is primarily used for sealing expansion joints in masonry and for perimeter pointing around window and door frames.

What is the maximum joint width this sealant can handle?

It is suitable for high-moving joints up to 50mm wide.

How long does it take for the sealant to skin over?

The skinning time is between 30 and 45 minutes, allowing ample time for tooling.

Is this sealant suitable for exterior use?

Yes, once cured, it is completely weatherproof with excellent UV resistance, making it suitable for external applications.

What surfaces does this silicone adhere to?

It adheres well to a wide range of materials including PVCu, plastic, copper, zinc, glazing, aluminium, and masonry.

Can I paint over this sealant?

It is compatible with most paints when fully cured, but a test patch is recommended before full application.

What are the storage conditions for the sealant tube?

Store tubes in a cool, dry place away from direct sunlight.

Does this product require a special sealant gun?

No, it is supplied in a standard 380ml tube and requires a standard sealant gun for application.

Troubleshooting

Sealant not extruding from the tube.

Ensure the tube's inner seal has been punctured and the sealant gun's release mechanism is disengaged before pulling the trigger.

Poor adhesion to the substrate.

Verify that surfaces are clean, dry, and free from dust, grease, or loose material. Re-clean and reapply if necessary.

Sealant sagging or slumping.

Ensure the sealant is applied evenly and that the joint width does not exceed 50mm. Check product specifications for maximum joint size.

Uneven or messy finish.

Use masking tape to create clean edges before application. Tool the bead within the 30-45 minute skinning time using a wet tool or finger dipped in soapy water for a smooth finish.

Sealant remains tacky after extended periods.

Ensure adequate ventilation and that application conditions are within the recommended temperature and humidity ranges. Avoid applying too thick a bead.

Pros and Cons

Pros

  • Excellent adhesion to a broad spectrum of building materials.
  • High flexibility for accommodating significant joint movement.
  • Superior UV and weather resistance ensures long-lasting performance outdoors.
  • Neutral cure system is safe for use on sensitive materials.
  • Extended working time facilitates easier and more professional application.
  • Non-slump properties improve ease of application on vertical surfaces.

Cons

  • Long skinning time may require additional care to prevent dust adhesion before curing.
  • Requires a sealant gun for application from the 380ml tube.
  • Not suitable for fully immersed continuous water contact.
  • Surface preparation is crucial for optimal adhesion.

Setup, Compatibility & Care

Setup:

  1. Ensure you have a standard sealant gun.
  2. Cut the nozzle tip to the desired bead size.
  3. Puncture the inner seal of the tube.
  4. Load the tube into the sealant gun.
  5. Apply the sealant evenly into the joint or gap.
  6. Tool the sealant within the skinning time (30-45 minutes) using a damp tool or finger.

Compatibility:

This silicone sealant adheres well to a wide range of common building materials including:

  • PVCu
  • Plastic
  • Copper
  • Zinc
  • Glazing
  • Aluminium
  • Masonry
  • Concrete
  • Brick
  • Stone

It is compatible with most paints when fully cured, but testing on a small, inconspicuous area is recommended.

Care:

  • Store tubes in a cool, dry place away from direct sunlight.
  • Keep out of reach of children.
  • Ensure good ventilation during application and curing.
  • Clean tools and excess sealant immediately after use with a damp cloth or appropriate solvent (refer to product data sheet for specifics).
  • Cured sealant can be removed mechanically.

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