Belzona 3111 (Flexible Membrane)

A single-component, liquid-applied roof coating for long-term roof protection and waterproofing.

A cold-applied liquid coating for long-term roof protection, providing outstanding waterproofing and weatherproofing properties. This single-component, solvent-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 material 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.

Key benefits:

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

Applications for Belzona 3111 (Flexible Membrane) include:

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

Key technical data:
Working life at temperatures between 5°C (41°F) to 30°C (86°F)	Indefinite
Drying time	30 minutes
Tensile strength (BS 2782)	1,450 psi (10.0 N per sq.mm) lengthwise, 580 psi (4.0 N per sq.mm) crosswise
Vapor resistance at 20°C (68°F)	33 MN/sg
Recommended coverage rate (per ltr)	Practical coverage rate for a 2 coat system: 1st coat 1.3 sq.m. (14 sq.ft.) per litre on concrete and brick 2nd coat 3.0 sq.m. (30 sq.ft.) per litre on concrete and brick 1st coat 1.9 sq.m. (21 sq.ft.) per litre on asphalt, smooth felt, bitumen and metals 2nd coat 3.0 sq.m. (30 sq.ft.) per litre on asphalt, smooth felt, bitumen and metals
Bonds to	Felt, asphalt, lead, zinc, copper, glass, concrete, brick and many more
Typical applications	Roof repair including leak sealing, waterproofing and weatherproofing
Unit size	18ltr. Pack sizes may vary locally.
Availability*	Global