Sikagard®-535

Liquid Applied Acrylic Vapor Permeable Air Barrier

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Sikagard®-535 Liquid Applied Acrylic Vapor Permeable Air Barrier is a low VOC, single-component liquid applied, elastomeric membrane designed to provide a vapor permeable air and water barrier when applied to above grade wall assemblies. It is acrylic-based and cures to a tough monolithic rubber-like membrane that resists air leakage and water penetration when applied to plywood and gypsum sheathing, concrete and concrete masonry units.

Evaluated by the Air Barrier Association of America
Passes ASTM E 2178
Passes ASTM E 2357
Passes ASTM E 331
Non-sag (thixotropic) consistency, allowing waste-free application of sufficient quantities and assuring deep penetration
Low odor, low VOC.
Seamless, elastomeric membrane for above grade wall applications.
Easy to install, cost effective brush, roller or spray application using commom spray equipment.
UV Stable for 12 month exposure. Longer exposure is possible for rainscreen applications. Contact Sika Technical Serives for details.
Some tinting is possible if required for rainscreen applications. Contact Sika Technical Services for details.
Water vapor permeance allows wall assemblies to dry out.
Excellent adhesion to common construction surfaces.
Meets industry performance standards to control air movement.
Evaluated for use in NFPA 285 assemblies.

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Product Data Sheet Show all documents

Usage

To be used in conjunction with SikaMembran® 540, Sikaflex® 102 EverFlash and Sikaflex® 11FC. Acceptable substrates are above grade exterior wall substrates including precast concrete, Cast-In-Place concrete, concrete block, gypsum board and wood.

Advantages

Evaluated by the Air Barrier Association of America
Passes ASTM E 2178
Passes ASTM E 2357
Passes ASTM E 331
Non-sag (thixotropic) consistency, allowing waste-free application of sufficient quantities and assuring deep penetration
Low odor, low VOC.
Seamless, elastomeric membrane for above grade wall applications.
Easy to install, cost effective brush, roller or spray application using commom spray equipment.
UV Stable for 12 month exposure. Longer exposure is possible for rainscreen applications. Contact Sika Technical Serives for details.
Some tinting is possible if required for rainscreen applications. Contact Sika Technical Services for details.
Water vapor permeance allows wall assemblies to dry out.
Excellent adhesion to common construction surfaces.
Meets industry performance standards to control air movement.
Evaluated for use in NFPA 285 assemblies.

Packaging

5 gallon pail, 55 gallon drum

Product Details

Product Information

Shelf Life

2 years in unopened containers.

Storage Conditions

Store in original containers. Store dry at 40°F - 90°F (4°C - 35°C)

Solid content by weight

62%

Weight per Gallon: 11.5 lbs

Solid content by volume

55%

Volatile organic compound (VOC) content

g/L < 80

Technical Information

Crack Bridging Ability

Pass ABAA 5.3

(C-1305)

Tensile Adhesion Strength

175 psi

(ASTM D-412)

Pull Adhesion: Pass ABAA 5.3

(ASTM D-4541)

Water Penetration under Pressure

Pass at 15 psf

(ASTM E-331)

Water Resistance: Pass ABAA 5.3

(AATCC 127)

Permeability to Water Vapor

6 perms

(ASTM E-96B)

Air Permeance

@16 mils wet:

<0.0004 cfm/s•ft² pressure differential of 1.57 lb/ft2 (Pass ABAA 5.3) or <0.002 L/ s•ft²

(ASTM E-2178)

Water Resistance

Pass ABAA 5.3

(AATCC-127)

Application

Application Information

Set Time

Sets to Touch: 6-12 hours

Waiting / Recoat Times

Recoat: 6-12 hours

Exposure: 12 months

Consumption

Coverage

Apply at a rate of 40 sf per gallon to achieve a uniform wet film thickness of 40 mils.

Application steps

MIXING

Stir liquid membrane thoroughly prior to application. For best results use a slow-speed drill (400-60 rpm) with a jiffy paddle.

APPLICATION

Sikagard®-535 Liquid Applied Acrylic Vapor Permeable Air Barrier may be applied by brush, roller or spray. Application by conventional air assisted spray equipment in a single or dual-coat application is the preferred method. Apply liquid air barrier membrane in a continuous, monolithic application pattern to achieve a uniform coating of permeable air and water barrier membrane. Monitor applications to measure wet mil thickness and avoid creating sags or runs. Pretreat outside corners, wall openings and mechanical penetrations with Sika- Membran® 540 tape. Apply liquid air barrier membrane to fully cover transition membrane applications.

Tie-in to structural beams, columns, floor slabs and intermittent floors, parapet curbs, foundation walls, roofing systems and at the interface of dissimilar materials with SikaMembran 540® tape and or approved flashing membrane.

Mark areas off and ensure that the appropriate volume has been applied over each area. During spraying, the product should be applied in horizontal strokes, then vertical strokes in a cross-hatch method to ensure even application. Spray applications must be immediately backrolled. Protect wall areas covered with Sikagard® 535 Liquid Applied Acrylic Vapor Permeable Air Barrier from damage due to construction activities, high wind conditions, and extended exposure to inclement weather.

Review condition of Sikagard® 535 Liquid Applied Acrylic Vapor Permeable Air Barrier prior to installation of cladding. Repair, or remove and replace damaged sections with new membrane. Recommend to cap and protect exposed back-up walls against wet weather conditions during and after application of membrane, including wall openings and construction activity above completed water-resistive vapor permeable air barrier installations.