Sika guarantees that the thickness of any Sarnafil membrane will meet or exceed the thickness indicated on the package label. If, at the time of installation, the membrane measures less than the labeled thickness per ASTM D-751, Sika will remunerate the building owner $0.05 per square foot for the amount of material measuring less than the labeled thickness to a maximum of $5,000.

Sarnafil roofing and waterproofing membranes are manufactured with a thickness ranging from 48 mils to 96 mils. Applicable products include all Sarnafil-branded membranes in all widths, including flashing membrane. This would encompass all thicknesses of Sarnafil S327 and G410 roofing membranes as well as the company’s G476 waterproofing membrane. The membrane thickness in mil units is included in the descriptor on the membrane roll labels for all Sarnafil-brand membranes.

For feltback membranes, lamination of felt to the back of the membrane interferes with the measurement of the membrane thickness after manufacture. Verification of membrane thickness will be made based on manufacturing quality assurance data.

Sarnafil Track Record

Proven performance over time is the best indicator of roofing system quality. Sika’s focus on producing the highest quality Sarnafil membranes has resulted in a track record second to none. Longevity under real-world conditions has occurred around the world, in all types of climates, and led the British Board of Agrément to issue a certificate in 2008 indicating that the durability of Sarnafil membranes, when used in accordance with the relevant BBA certificates, should have a life in excess of 35 years. The accompanying Sika Sarnafil Longevity Table lists just a sampling of Sarnafil roofing system installations still performing today after many decades of service.

29+ Years

Robbins Hall

University of California, Davis

45+ Years

Hydro Power Station

Personico, Switzerland

* All thickness measurements for bareback membrane(1) are made as specified in ASTM D-751, the test method specified in ASTM PVC standard D4434. The gauge used to measure thickness is a deadweight type equipped with a dial graduated to read directly to 0.001 in. Measurements are made at a minimum of 5 different areas across the width of the sheet, exclusive of the area adjacent to either selvage and within one tenth the width of the membrane or within 100 inches (2.5 m) of either end.The measurements are then averaged and reported as the average thickness.

(1) Feltback Membrane: Lamination of felt to the back of the membrane interferes with the measurement of the membrane thickness after manufacture. Verification of membrane thickness will be made based on manufacturing quality assurance data.

NO OTHER WARRANTIES EXPRESS OR IMPLIED SHALL APPLY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. SIKA SHALL NOT BE LIABLE UNDER ANY LEGAL THEORY FOR SPECIAL OR CONSEQUENTIAL DAMAGES. SIKA SHALL NOT BE RESPONSIBLE FOR THE USE OF THIS PRODUCT IN A MANNER TO INFRINGE ON ANY PATENT OR ANY OTHER INTELLECTUAL PROPERTY RIGHTS HELD BY OTHERS.

Sika reserves the right to change the properties of its products without notice. All sales of Sika product(s) are subject to its current terms and conditions of sale which are available at www.sikausa.com or by calling 1-800-828-5400.

Prior to each use of any Sika product, the user must always read and follow the warnings and instructions on the product’s most current Technical Data Sheet, product label and Material Safety Data Sheet which are available at www.sarnafil.sika.com or 1-800-828-5400. Nothing contained in any Sika materials relieves the user of the obligation to read and follow the warnings and instruction for each Sika product as set forth in the current Technical Data Sheet, product label and Material Safety Data Sheet prior to product use.