Air Barriers - SikaMembran®-540

Self-Adhesive Air / Vapor Barrier

SikaMembran®-540 is a self-adhering sheet membrane consisting of an engineered block-copolymer adhesive on a durable, conformable polypropylene film. The membrane is designed to be adhered to a variety of substrates and is available in rolls of various widths which may be used for full wall applications or as a penetration/flashing membrane used with other Sika air barrier systems.

• Fully bonded
• Waterproof and airtight
• Excellent adhesion to a variety of substrates
• Compatible with Sikagard liquid air barriers
• Tough film that resists punctures and tears
• Conforms to irregular surfaces
• Passes E 2178

Usage

SikaMembran®-540 is designed to be used in above-grade wall assemblies including concrete, concrete masonry units (CMU), plywood, OSB and exterior gypsum sheathing. Other applications include transition tape application for door, window and other openings and to connect the air barrier to the door, window or other penetration.

Advantages

• Fully bonded
• Waterproof and airtight
• Excellent adhesion to a variety of substrates
• Compatible with Sikagard liquid air barriers
• Tough film that resists punctures and tears
• Conforms to irregular surfaces
• Passes E 2178

Packaging

36” width by 75 ft. roll, 1 roll per box
18” width by 75 ft. roll, 2 rolls per box
12” width by 75 ft. roll, 3 rolls per box
6” width by 75 ft. roll, 6 rolls per box
4” width by 75 ft. roll, 9 rolls per box

Product Details

Product Information

Shelf Life

1 year in original packaging at recommended storage conditions

Storage Conditions

Store pallets under cover at temperatures between 40 °F and 100 °F

Thickness

8 mils

UV Exposure

Cover within 60 days

Service Temperature

min. -20 °F max. 150 °F

Application

Application Information

Ambient Air Temperature

min. 40 °F and rising

Substrate Temperature

min. 40 °F and rising

Application Steps

SUBSTRATE PREPARATION

Acceptable substrates include concrete, concrete masonry units, primed steel, aluminum, mill finish, anodized aluminum, galvanized metal, exterior gypsum board and wood. Primer may be required for CMU or if adhesion is inadequate on substrates due to surface conditions beyond the control of the installer. Sika® Latex R may be used for priming if required.
Surfaces must be sound, clean, dry and free of frost, dirt, dust, loose concrete, grease, oil, contaminants or other foreign matter that may adversely affect the adhesion of the membrane. Surfaces should be free of voids, gaps, breaks and spalls. New concrete should cure a minimum of 7 days, masonry mortar joints should be full and flush, holes or cracks greater than ¼” should be filled in with an appropriate mortar if static or with a suitable sealant or filler if required to move. Gypsum, plywood and OSB sheathing boards shall be properly fastened, flush at the joints with gaps according to building codes and sheathing board manufacturer.
Moisture content should be checked using a Tramex® moisture meter with a 4 % maximum allowable measurement.

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