Sika Everbuild 450 Premium LM Coloured Builders Silicone Sealant 7 Colours

Sika Everbuild 450 Everflex Premium LM Builders Silicone sealant C3 300ml

Product Overview

Sika Everbuild Everflex 450 LM Premium Builders Silicone Sealant – formerly branded under Everbuild – is a low modulus, neutral cure sealant designed for professional building and construction applications. Trusted by tradesmen for its outstanding flexibility, strong adhesion, and weather resistance, this high-performance silicone provides a long-lasting seal on a variety of materials including PVCu, aluminium, metal, wood, and masonry and can be applied using a standard 310ml 380/400ml Sealant Gun

It’s ideal for perimeter sealing around doors and windows, joint sealing to pre-formed panels, and general construction use where movement and durability are key. The neutral cure formula ensures compatibility with sensitive surfaces, preventing corrosion and staining. Available in seven professional colours – Black, Brown, Buff, Grey, Oak, Translucent, and White – Everflex 450 LM delivers a clean finish that blends seamlessly with surrounding materials. Now transitioned from Everbuild to Sika, this upgraded professional-grade sealant continues the same trusted performance under the Sika name.

Key Features

• Low modulus neutral cure formulation for superior flexibility

• Excellent adhesion to glass, metals, plastics, wood, and masonry

• Suitable for both interior and exterior use

• High weather, UV, and ageing resistance for long-lasting durability

• Non-corrosive – safe on sensitive materials such as lead, copper, and zinc

• Low dirt pick-up for cleaner joints

• ±25% movement capability ensures lasting seals

• Compatible with both solvent and water-based paints

• Supplied in a standard 300ml C3 cartridge

Applications

• Internal and external perimeter pointing around PVCu, wood, and metal window frames

• Sealing soft metals such as lead, copper, and zinc

• General glazing, draught-proofing, and repair work

• Bedding and sealing insulated glass units (complies with BS8000 Part 7)

• Weather sealing and expansion joints in pre-formed panels

• Adhesive use on PVCu trims, components, and construction materials

• Parapet and roof weatherproof sealing

7 Available Colours

• Black – 450BK – Sika Code 484832

• Brown – 450BN – Sika Code 484833

• Buff – 450BF – Sika Code 484831

• Grey – 450GY – Sika Code 484834

• Oak – 450OAK – Sika Code 484835

• Translucent – 450TR – Sika Code 484836

• White – 450WE – Sika Code 484830

How to Use

Ensure surfaces are clean, dry, and free from grease, dust, or old sealant. For porous surfaces, a suitable Everbuild primer may be used. The use of a Backing Backer Rod is recommended to for the correct joint configuration Cut the nozzle at an angle and apply evenly using a sealant gun, ensuring full contact with both sides of the joint. Tool off within 10 minutes with a little soapy water or Sika Tooling Agent for a smooth professional finish. Allow to fully cure before exposure to water or extreme conditions.

FAQs

• What makes Everbuild 450 different from standard silicones?
  It’s a neutral cure, low modulus formula that remains flexible, resists UV and weathering, and won’t corrode metals—ideal for professional building applications.

• Is it suitable for outdoor use?
  Yes, it provides long-term resistance against UV, rain, and temperature fluctuations, making it perfect for both interior and exterior projects.

• Can it be painted over?
  It can be used over solvent and water-based paints once fully cured, with high resistance to plasticiser migration.

• Does it adhere to plastics and metals?
  Yes, it bonds well to PVCu, polycarbonate, lead, copper, zinc, aluminium, and many other building materials.

• What is the best way to achieve a clean finish?
  Apply using a sealant gun and tool the joint immediately after application. Use masking tape for neat edges, removing it before the sealant skins.

Everbuild 450 Silicone Sealant Information:

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

Also Available Everbuild 450 in Boxes of 25