Everbuild 825 Tecnic Silicone 380ml - Buff

This Everbuild Tecnic Silicone 825 is a low modulus, neutral curing silicone sealant based on a fi...

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Power Tools DirectSikasil Sika -825 Silicone Sealant Buff 380 Ml
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Blueperry agriculture (UK)Everbuild Sika Everbuild Sikasil-825 Silicone Sealant Buff 380Ml 835397
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AmazonSika Sikasil 825 Silicone Sealant, Buff, 380 ml
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Tooled UpEverbuild Buff Tecnic Silicone Sealant
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Materials Market Trading UK LtdEverbuild Silicone 825 380Ml Buff
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Product Information

Full details

This guide is for builders, contractors, and DIY enthusiasts looking for a reliable, neutral-cure silicone sealant. The Everbuild Tecnic Silicone 825 in Buff offers extended working time for larger projects, ensuring a professional finish. Its primary caveat is that it requires a fully cured state before it can withstand stress, making it unsuitable for joints under immediate movement.

All features

ColourBeige
Model Part Number825BUFF
BrandEverbuild

Extended Product Information

FAQs

What is the main advantage of Tecnic Silicone 825?

Its main advantage is the extended tool downtime, allowing for easier and more precise application on larger joints without premature skinning.

Can this silicone be painted over?

No, silicone sealants are generally not designed to be painted over. Paint may not adhere well and can peel.

Is this sealant suitable for sanitary applications?

While it offers good weather resistance, it is not specifically formulated with anti-fungal properties for sanitary use. For sanitary areas, consider a specific sanitary silicone.

What is the shelf life of the product?

Unopened cartridges typically have a shelf life of 12 months when stored in cool, dry conditions away from direct sunlight.

How long does it take to cure fully?

Cure time depends on temperature and humidity. A skin will typically form within 10-20 minutes, but full cure can take 24 hours or more for thicker applications.

What is the difference between low modulus and high modulus silicone?

Low modulus silicones are more flexible and have better adhesion to a wider range of materials, including those with different expansion rates. High modulus silicones are less flexible but can be stronger and are often paintable.

Can I use this in a shower enclosure?

This product is generally used for construction and weather sealing. For shower enclosures, a specific anti-fungal sanitary silicone is usually recommended to prevent mold growth.

Troubleshooting

Sealant not extruding from the cartridge

Ensure the nozzle is cut correctly and the release mechanism on the sealant gun is disengaged. Check that the plunger is fully engaged with the cartridge base.

Poor adhesion to substrate

Ensure the surface is clean, dry, and free from any contaminants like dust, grease, or old sealant. For porous surfaces, a primer may be necessary.

Sealant skins too quickly before tooling

While this product has extended tool downtime, ensure you are working in appropriate conditions. Reduce the length of the joint being tooled at one time if necessary.

Discoloration of sealant

Avoid contact with incompatible materials or finishes that may cause staining. Ensure proper ventilation during curing.

Pros and Cons

Pros

  • Excellent adhesion to various substrates.
  • Extended working time for easier application on large areas.
  • High flexibility accommodates joint movement.
  • Neutral cure for low odor and substrate safety.
  • Suitable for both indoor and outdoor applications.
  • Certified to industry standards (ISO 11600).

Cons

  • Requires full cure before being subjected to stress or movement.
  • Not suitable for applications requiring immediate load-bearing after application.
  • Buff color may not match all aesthetic requirements (other colors are available).

Setup, Compatibility & Care

Setup:

  1. Ensure surfaces are clean, dry, and free from dust, grease, and old sealant.
  2. Cut the nozzle at an angle to achieve the desired bead size.
  3. Apply the sealant using a standard sealant gun to the joint.
  4. Tool the sealant immediately after application using a damp tool or spatula to ensure good surface contact and a neat finish.
  5. Remove excess sealant with a damp cloth before it cures.

Compatibility:

The Tecnic Silicone 825 is compatible with most common building materials including concrete, brickwork, masonry, aluminium, uPVC, painted wood, and glass. It is certified to ISO 11600 F25LM and G25LM. Avoid using on surfaces that may bleed oils or plasticizers, such as some rubbers and bitumen.

Care:

Once fully cured, the sealant can be cleaned using mild soap and water. Avoid abrasive cleaners which may damage the surface.

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