Upgrade your sealing projects with Demsun N27, a premium silicone engineered for versatility and long-term durability. This neutral-cure formula is specifically designed for the construction industry, providing a flexible, weather-resistant seal that won’t give off that harsh vinegar smell or damage sensitive surfaces.
Non-Corrosive Formula: Safe for use on metals, PVC-U, concrete, and masonry without risk of reaction.
High Elasticity: Accommodates significant joint movement, making it ideal for expansion joints and window frames.
UV & Weather Resistant: Built to withstand the British weather, ensuring it won’t crack, shrink, or discolour over time.
£5.49 Incl. VAT
When it comes to professional construction, not all silicone is created equal. Demsun N27 is a neutral-cure sealant, meaning it releases alcohol instead of acid during the curing process. This makes it the essential choice for sealing sensitive materials like lead, copper, and natural stone, where standard acidic silicones would cause corrosion or staining.
Whether you are sealing around energy-efficient window frames or finishing a boiler flue installation, this Demsun silicone provides an airtight, waterproof barrier. Its low-modulus properties mean it remains highly flexible even after curing, allowing it to expand and contract with the building’s natural movements. This prevents the “peeling” often seen with cheaper, more rigid fillers.
Demsun N27 is favoured by installers for its excellent “gunnability” and ease of tooling. It adheres perfectly to almost all common building substrates—including glass, wood, treated metals, and plastics—without the need for a primer. At ECO HEAT SHOP, we know that longevity matters; that’s why we stock N27, as its high-spec formula ensures a permanent bond that resists mould and environmental degradation.
Cure Type: Neutral (Low Modulus)
Skin Formation: 5–15 minutes (depending on humidity)
Temperature Resistance: -40°C to +120°C
Application Temperature: +5°C to +40°C
Environment: Suitable for indoor and outdoor use.
For a reliable, “set and forget” solution that protects your property’s thermal envelope, this silicone is the top-tier choice for your next project.
| Weight | 0.44 kg |
|---|---|
| Dimensions | 30 × 4 × 4 mm |
ECO Heat Shop Ltd provides national distribution for plumbing and heating supplies across England, Scotland, and Wales. Orders placed before the 18:00 PM (Afternoon) cutoff are typically processed for same-day dispatch.
View Full Shipping & Collection Policy ›Hours: Monday – Saturday: 08:30 AM – 06:30 PM | Sunday: Closed
Location: Unit 8 West Cross Shopping Centre, Oldbury Rd, Smethwick, B66 1JG
In-shop precision key cutting available during standard operational hours. Professional while-you-wait service for Smethwick residents and trade contractors.
Smart supplies for real heat.
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