LMN Building Silicone Sealant - White/Clear - Biokil Crown

Low Modulus, Neutral Cure Silicone for Multi-Surface Sealing

Biokil Crown LMN Building Silicone Sealant is a premium-grade, low modulus neutral cure (LMN) RTV silicone designed for professional sealing applications. It adheres to a wide range of porous and non-porous substrates—including glass, metals, plastics, wood, and PVCu—without the need for priming. With excellent flexibility and weather resistance, it is ideal for both interior and exterior use in construction, glazing, and façade sealing.

Key Features & Benefits

• Excellent Adhesion: Bonds effectively to most common building materials without priming.
• Flexible Movement: Accommodates joint movement up to ±50% without cracking.
• Weather Resistant: Provides durable, long-lasting seals in external environments.
• Low Dirt Pick-Up: Maintains a clean appearance over time, ideal for PVCu applications.
• Paint Compatibility: Suitable for use over water-based and solvent-based paints.
• Conforms to Standards: Meets BS5889 Type A (except clause 9) and ISO11600 F&G 25LM.

Product Details

• Type: Low modulus neutral cure RTV silicone
• Movement Accommodation: ±50%
• Skinning Time: 5–20 minutes
• Cure Rate: Approximately 1mm per 24 hours
• Service Temperature: -50°C to +120°C
• Application Temperature: +5°C to +40°C

Application Instructions

1. Ensure surfaces are clean, dry, and free from dust, grease, and other contaminants.
2. Cut the tip of the cartridge, attach the nozzle, and cut it at a 45° angle to the desired bead size.
3. Apply the sealant using a standard sealant gun, maintaining steady pressure and consistent speed.
4. Tool the sealant within 5 minutes of application to ensure proper adhesion and a smooth finish.
5. Remove any masking tape before the sealant skins over (within 5 minutes).
6. Allow the sealant to cure fully before exposing it to water or other stresses.

Typical Uses

• Perimeter sealing around PVCu, wood, and metal window and door frames.
• Sealing joints in curtain walling and pre-formed panels.
• General glazing applications, including glass-to-glass and glass-to-metal joints.
• Weather sealing in parapets, roofs, and other external building elements.
• Sealing soft metals such as lead, copper, and zinc.
• Expansion joint sealing in construction applications.