Belzona 3211

3000 Series — Thermal Insulation Protection

Belzona 3211

Lagseal — Single-component, seamless and flexible coating for encapsulation of all types of thermal insulation and cladding systems.

A water-based acrylic emulsion membrane providing fire-resistant, seamless protection to thermal insulation on pipes, tanks, vessels and complex equipment. Fire resistant — Class O (UK Building Regulations) and Class A (ASTM E84). No mixing, applicable to damp or dry insulation. Prevents corrosion under insulation (CUI).

Belzona 3211 Lagseal applied to insulation

Product Description

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.

Water, weather and fire resistant. Microporous nature allows trapped moisture from within the insulation to evaporate, preventing corrosion under insulation (CUI). This 100% solids, single pack system requires no mixing and can be applied to damp as well as dry insulation.

Class O
UK Building Regulations 1991 — fire performance
Class A — ASTM E84
Fire and flame spread classification
100% Solids
Reduced health & safety risk, no VOCs

Key Benefits

  • Fire resistant — Class O and Class A certified
  • Easily applied by brush with no mixing required
  • Reduced health and safety risks — 100% solids
  • Application and cure at cold temperatures — no hot work involved
  • Will not support growth of bacteria or algae — provides a hygienic finish
  • Excellent oil resistance
  • Withstands movement due to temperature fluctuations and vibrations
  • Resistant to water, steam impingement, infra-red and ultra-violet radiation
  • Excellent adhesion to calcium silicate, glass fibre, mineral wool, foam, steel and stainless steel

Applications

  • 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

* All products are subject to regional restrictions.

Product Video

Photo Gallery

Lagging wrapped — complex shapes can be easily protected
Lagging wrapped — complex shapes easily protected
Liquid applied Belzona 3211 membrane follows all contours
Liquid applied membrane follows all contours
Complex pipework encapsulation for HVAC equipment
Complex pipework encapsulation for HVAC equipment
Damaged LNG spheres
Damaged LNG spheres
Insulated LNG spheres protected with Belzona 3211
Insulated LNG spheres — easily protected
Water penetration and algae formation along corroded tank base
Water penetration and algae on corroded tank base
Tank base sealed with Belzona 3211 Lagseal
Tank base sealed with Belzona 3211 Lagseal

More Information

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