Sika SikaSeal Ultra Construction Silicone Builders Sealant

Sika SikaSeal Construction Silicone Ultra Builders Sealant - Direct Replacement for Everbuild 450 Silicone Sealant - Sold in Singles

Sika Code and Colours: 880254 (Black), 880126 (Brown), 880260 (Buff), 880244 (Grey), 880194 (Clear Translucent), 880245 (White), Anthracite to Follow

Rebranded: From Everbuild to Sika as part of the transition to the Sika Product Range

Formally: Everbuild 450 Sealant now called - Sika Sikaseal Construction Ultra - only the tube and name has changed.

Overview:

Sika Sikaseal Construction Silicone Ultra is a professional low modulus, neutral cure sealant designed for reliable, long-lasting sealing in construction and glazing work. Sikaseal Construction Ultra is a professional sealant designed for dependable, long-term sealing on busy building and glazing jobs. It’s the direct replacement for Everbuild 450 Silicone Sealant, brought into the Sika range as part of the Everbuild-to-Sika transition so while the branding and cartridge have changed, it’s still aimed at the same trade applications where strong adhesion, clean tooling and reliable flexibility matter.

Ideal for interior and exterior use, it provides a durable, weather-resistant seal around frames and panels and performs well on many common construction substrates including PVCu, Polycarbonate, glass, metals and masonry. Whether you’re perimeter pointing windows and doors, sealing cladding joints, or carrying out general maintenance work, it’s a solid, everyday silicone that helps reduce call-backs by keeping joints neat, flexible and sealed.

Key Features

• Direct replacement for Everbuild 450 LM (rebranded into the Sika range)

• Low modulus silicone helps joints flex with movement

• Neutral cure: compatible with many construction materials (including PVCu, Polycarbonate, metals and glass)

• Excellent weathering and UV resistance for exterior seals

• Strong adhesion to many common substrates without primer (surface dependent)

• Suitable for perimeter pointing, glazing, and general construction joints

• Available in multiple trade colours for a tidy, matched finish

Specifications

• Brand: Sika

• Product Name: Sikaseal Construction Ultra

• Product Type: Low modulus, neutral cure silicone sealant

• Cartridge Size: 300ml

• Use: Interior & exterior

• Colours / Sika Codes:

  • Black: 880254

  • Brown: 880126

  • Buff: 880260

  • Grey: 880244

  • Clear Translucent: 880194

  • White: 880245

  • Anthracite: to follow

Applications

• Perimeter sealing around PVCu, timber and aluminium window & door frames

• General weatherproof sealing of joints and panels in construction and cladding

• Glazing and glass-to-metal sealing (non-structural)

• Sealing around suitable building components and trims

• Movement and expansion joints (where a flexible seal is required)

• Refurb and maintenance sealing, including repair work over suitable existing sealants (test first)

How to Use

Using the Sikaseal Construction Ultra is simple and ensures professional results:

1. Prepare the Surface: Ensure all surfaces are clean, dry, and free of dust, grease, or contaminants.
2. Backer Rod: Fill all voids with backer rod to create the perfect flexible joint.
3. Select the Colour: Choose the appropriate colour for the material and aesthetic requirements.
4. Cut the Nozzle: Cut the cartridge nozzle at a 45-degree angle to match the desired bead size.
5. Load the Cartridge: Insert the cartridge into a caulking gun.
6. Apply the Silicone: Run a consistent bead along the joint, ensuring even coverage.
7. Tool the Joint: Smooth the silicone with a tooling stick or your finger dipped in soapy water or Sika Tooling Agent for a neat finish.
8. Allow to Cure: The sealant will skin over in approximately 10-15 minutes and cure fully within 24 hours, depending on conditions.

Sika Sikaseal Construction Ultra – Key FAQs

• Is this the same as Everbuild 450 LM?
  It’s the direct replacement following the Everbuild to Sika transition, with updated branding and cartridge presentation.

• Can it be used outdoors?
  Yes, it’s suitable for exterior sealing with strong resistance to weathering and UV exposure.

• Do I need a primer?
  Usually not on common, sound substrates, but adhesion can vary—testing on unusual surfaces is recommended.

• Where is it commonly used?
  Typical uses include frame perimeter seals, glazing (non-structural), cladding joints and general construction sealing.

• Which colour should I choose?
  Pick the closest match to your frame or finish: Black, Brown, Buff, Grey, Anthracite, Clear Translucent or White.

• What does low modulus mean?
  Low modulus silicone is designed to remain flexible, helping the seal cope with movement in building joints.

"Always read the Technical Datasheet prior to first use to ensure you have the correct information and  product for your application"