A water-based acrylic emulsion membrane incorporating a polymer bonded glass reinforcing sheet (Belzona 9321) designed to provide seamless, flexible protection to all types of thermal insulation and cladding systems.
Belzona 3211 (Lagseal) is water, weather and fire resistant, and conforms to the requirements for a ‘Class O’ surface for ‘The UK Building Regulations 1991’ and ‘Class A’ in accordance with ‘ASTM E84’. The system provides protection from water ingress whilst its microporous nature allows trapped moisture from within the insulation to evaporate. This solvent-free, single pack system requires no mixing and is simple to apply to damp as well as dry insulation.
Key benefits:
Fire resistant
Easily applied by brush with no mixing required
Reduced health and safety risks as it is solvent-free
Application and cure at cold temperature - no hot work involved
Will not support growth of bacteria or algae providing a hygienic finish
Excellent oil resistance
Withstands movement due to temperature fluctuations and vibrations within the system
Resistant to water, steam impingement, infra-red and ultra-violet radiation
Excellent adhesion to a wide range of materials including calcium silicate, glass fibre, mineral wool, foam, steel and stainless steel
Applications for Belzona 3211 (Lagseal) include:
Protection of insulation on pipes, air-conditioning ducting, valve boxes, flange covers, boilers, pressure vessels, bulk storage tanks and heat exchangers
Long-term lagging protection on new and existing steam, condensate or chilled pipelines
Seamless encapsulation of elbows, T pieces flanges and complex contours
Tank base sealing
Key technical data:
Working life at temperatures between 5°C (41°F) to 30°C (86°F)
Indefinite
Drying Time at 20°C (68°F)
1st coat 4 hours, 2nd coat 2 hours
Tensile strength (BS 2782) at 20°C (68°F)
370 psi (2.5N per sq.mm) unreinforced system after 7 days at 20°C (68°F)
Vapor resistance at 20°C (68°F)
10 MN/sg
Fire resistance
The UK Building Regulations 1991 conforms to the requirements for a Class O surface
ASTM E84 meets class A with flame spread index less than 25 and smoke developed index less than 100
BS 476 Part 6 - 2.8
BS 476 Part 7 meets class 1 surface spread flame
Oil resistance
The system is unaffected by immersion for 24 hours in light fuel and lubricating oil at 50°C (122°F)
Bonds to
Calcium silicate, glass fibre, mineral wool, foam and other metal surfaces
Typical applications
Protective coating for all types of insulation
Unit size
22 kg. Pack sizes may vary locally
Availability*
Global
* All products are subject to regional restrictions. Check with your local Distributor for more information
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