SikaShield® E74 S SA 3 mm

• Meets or exceeds the ASTM D6163, Type I, Grade S
• Underwriters Laboratory (UL)
• FM Global

SBS-modified bitumen

Non-woven spunbond polyester fabric stabilized with fiberglass

12 months from date of production

The Product must be stored in original unopened and undamaged packaging in dry conditions and temperatures between 55°F (12°C) and 80°F (26°C). Store in a vertical position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. 

Sand

Removable Film

80 pounds per roll

Maximum 80%

• The supporting structure must be of sufficient structural strength to support all new and existing layers of the system build-up.
• If used as a roof system, the complete system must be designed to withstand and be secured against wind uplift loadings.
• The substrate surface must be uniform, firm, smooth and free of any sharp protrusion or burs, clean, dry, free of grease, laitance, oil, dust and loosely adhering particles.

A primer must be applied to all substrates unless otherwise specified by the Sika Technical Service.

1. Apply the appropriate Sika® primer at the recommended consumption rate to the prepared surface. Refer to the individual Product Data Sheet of the primer.
2. Allow the primer to fully dry before installing the membrane.

To avoid coinciding joints, lay the membranes parallel to one another, align it properly, ensure the specified overlaps are followed, and then re-roll it before application.

MEMBRANE OVERLAPS

• Overlap the membranes by a minimum of 4" (100 mm) on the sides and 6" (150 mm) on each end. 
• At the end overlap, cut off a corner measuring 4" (100 mm) per side at an angle of 45°.
• End laps must be staggered 18'' (46 cm) apart.
• Offset cap sheet side and end laps so they are positioned at least 12'' (28 cm) away from any base ply laps.
• A minimum 20 lb (9 kg) roller must be used on all sides and end laps, following immediately behind the heat welding. Apply uniform pressure across the lap area while the bituminous compound is warm to ensure a positive bond.
• A continuous bead of asphalt approximately 1/4 inch wide should be visible at all laps after application.
• The edge of the seam must be left untooled (not buttered).

IMPORTANT: DO NOT STACK LAPS!

SELF-ADHESIVE BONDING

1. At one end of the sheet, remove the first 18-24" of release film and press the membrane into place with firm, even pressure.
2. Gradually remove the remaining release film, applying pressure from the center to the edges.
3. Roll the entire surface area of the applied membrane with a heavy roller to ensure any air bubbles are removed.

Suitable substrates:

• Concrete
• Gypsum coverboard
• Metal substrates
• Rigid coverboards
• Wood
• Bituminous membranes with a smooth surface
• Tiles
• Brick masonry
• Cementitious screeds
• Plasterboards
• Plasters
• Foamed concrete blocks, if properly primed (Contact Sika Technical Services for more information)

DETAILING

Use a sharp knife to cut in all details such as internal and external corners, upstands, vent pipes, drains, support metalwork etc.

Refer to the relevant method statement for further information on detailing.