Belzona 3211 (Lagseal)

A single-component, seamless and flexible coating for encapsulation of all types of thermal insulation and cladding systems.
Where to Buy

Belzona 3211 (Lagseal)

A single-component, seamless and flexible coating for encapsulation of all types of thermal insulation and cladding systems.
Where to Buy
Description

Belzona 3211 (Lagseal) is a single-component, liquid-applied roof waterproofing membrane for long-term roof protection with outstanding weatherproofing properties. This isocyanate-free roof coating will bond strongly to all types of roofing materials, following even complex roof contours, and will allow the surface to breathe due to its microporous structure. The applied system incorporates a reinforcement sheet to allow an easy control of the coating thickness during the application as well as adapting to roof movement due to its outstanding elasticity.

This water-based flexible membrane can be applied on almost any location including schools, hospitals and public buildings thanks to its low odour. It is certified by the BBA and has proven to provide excellent protection of roofs for in excess of 25 years.

  • Provides long-term roof protection
  • Microporous structure allows trapped moisture to escape whilst providing long-term weatherproofing protection
  • Reduced health and safety risks as it is solvent-free
  • Lightweight material, will not overload existing structures
  • Excellent adhesion to a wide range of materials including felt, asphalt, lead, zinc, copper, glass, concrete and brick
  • Adapts to roof movements due to its outstanding elasticity
  • Can be easily applied by brush and roller with no mixing required
  • Application and cure at room temperature no hot work involved
  • Energy Star approved as it incorporates special reflective fillers, which reflect sunlight and minimize air conditioning costs
  • Creation of waterproof and weatherproof roof surfaces
  • Long-term roof leak repair and protection of deteriorated gutters
  • Sealing of glazing bars
  • Weatherproofing around upstands and other roof protrusions such as skylights, chimneys and vents
  • Replacement of damaged or missing flashings
  • Sealing of gaps and joints on coping stones as well as roof parapet walls
  • Sealing of tank bases

* All products are subject to regional restrictions. Check with your local Distributor for more information

15 L 18 L and 120 L

Note: Sizing and availability may change per region. Please contact Belzona for details.

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QUESTIONS & ANSWERS

The acrylic membrane, Belzona 3211 (Lagseal), works by creating a barrier in combination with Belzona 9321 (Reinforcement Sheets). Together, the product will create a water, UV, and fire-resistant coating for equipment due to the properties of its chemical composition. In addition to being water-resistant, the coating is micro-porous and allows the moisture from the substrate to evaporate.
The application of the isocyanate-free membrane, Belzona 3211 (Lagseal), depends on the substrate. Generally, the area must be sturdy, clean, dry, and free of loose material. There are two ways to apply Belzona 3211 (Lagseal). First, it can be applied using brushes, and second, an airless spray. When using a brush, apply a small patch of Belzona 3211 (Lagseal) to one area. While still wet, stipple a layer of Belzona 9321 (Lagseal Reinforcement Sheet). Wrap the sheet tightly around the insulation with minimum overlapping. Then, brush Belzona 3211 (Lagseal) through the sheet to give an even layer. Finally, after the first coating has dried, apply the second coat of Belzona 3211 (Lagseal). Otherwise, use airless spray equipment. A 32:1 pup unit supplied by an air pressure of 60 psi and combined with a spray tip of 0.015 ins to 0.020 ins is recommended. Thinning the product up to 20% may be required. Please see the Instructions for Use (IFU) for more information: Belzona 3211
The cure times of the flexible protection system, Belzona 3211 (Lagseal), are as follows: Drying Times at 68°F (20°C)
Priming coat First layer Second layer
Touch dry 30 minutes 2 hours 1 hour
Hard dry for overcoating 1 hour 4 hours 2 hours
Maximum overcoating time 3 days 3 days 3 days
Full hardness when chemical contact is anticipated 7 days 7 days 7 days
Please see the Instructions for Use (IFU) for more information: Belzona 3211