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SELECTING AND SPECIFYING THE PRODUCT
1 Product Description and Suitable Applications
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With Sealtec's expertise in waterproof membrane systems and our technical partnership with international membrane manufacturers and suppliers Pazkar Ltd , the Master Roof Liquid Applied Membrane System was developed for:
- Waterproofing flat and low sloping roofs.
- Renovating old flat and low sloping roofs.
- Resurface existing bitumen flat and low sloping roofs.
- Asbestos Encapsulation. (specific design only)
Master Roof is suitable for application to concrete, fibre cement, wet area timber sheeting and external grade plywood surfaces –see Substrate Requirements and Compatibility for full details.
Master Roof has been tested for 3000 hours of QUV Accelerated Weathering.
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Sealtec Waterproofing Systems are a complete membrane solution, supported by a range of specialty products to provide assurance and security against the penetration of water in any form.
The Master Roof Liquid Applied Membrane System is a white hybrid polymeric waterproofing and coating material resistant to extreme temperatures and to ponding water. Master Roof features excellent solar reflectivity and emissivity properties. The material is applied as a thick paste forming a seamless, decorative and flexible membrane that prevents water penetration and extends roof life.
Sealtec has incorporated SealFLEX 80 and 150 reinforcement tape for under flashings, ply joints, movement joints, cracks, general detailing and extra internal external corner gusseting in critical areas, to be applied as part of the system.
Sealtec specify all ancillary products to be used as part of the Master Roof Liquid Applied Membrane System for ease of design and application.
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This system consists of a two coat hybrid polymeric spray applied membrane:
First layer Master Roof applied directly to a primed substrate, followed by a second layer of Master Roof applied directly over the Master Roof base layer taking care to apply at different directions to the previous layer.
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| This system creates a two coat membrane system totalling up to 3mm thick. |
2 Product List
The Master Roof Liquid Applied Membrane System includes these ancillary products:
| Membranes: |
Accessories |
- Master Roof is a white hybrid polymeric waterproofing and coating membrane. Applied as a thick paste forming a thick seamless UV resistant membrane.
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- SealPRO Backing Rod polyethylene foam backing rod in various sizes ranging from 5mm – 50mm.
- SealFLOW polypropylene, aluminium or stainless steel droppers, sumps, scuppers and outlets.
- SealFLEX 80 and 150 is a self adhesive stretchy tape composed of a layer of visco-elastic butyl and a non-woven backing. A dual strip, waxed release paper protects the adhesive side and enables the product to be easily installed in internal corners.
- Metabronze clamp tight outlets and grates.
- Quickflash aluminium and Colorsteel® Maxx™ flashings.
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| Sealants: |
Primers: |
- SealPRO 151 single component, paintable non slump polyurethane sealant.
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- Master Roof Primer is a primer of white Master Roof diluted with water at a ratio of 1:1.
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3 Limitations
Limitations for this product are as listed below:
- Not to be used as a trafficable surface.
- Not designed as a sealant for expansion or control joints.
- Not to be used in areas subject to negative hydrostatic pressure.
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- Not to be applied to glass, perspex, and plastic or glazed surfaces.
- Not to be used in areas where solvent or petroleum based products may be spilled.
- Tiles are not to be fixed directly to the membrane.
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Following are weather limitations that will greatly affect the application of this product:
- Do not apply to areas when rain is imminent.
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- Do not apply when surface temperature is below 5 degrees Celsius or above 35 degrees Celsius.
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4 Substrate Requirements
Substrates suitable for application of the Master Roof system are:
- Concrete, concrete block, render and masonry.
- External grade plywood.
- Bituminous membranes and bitumen surfaces.
- Most sealants.
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- Fibre cement sheeting, plasterboard and structural sheeting.
- Galvanised steel and aluminium.
- Asbestos encapsulation. (specific design only).
- Any finish coatings applied over Master Roof Liquid Applied Membrane System should be specifically designed for the purpose, and be solvent free.
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Please refer to priming details for each of the substrate types before proceeding.
For further information on suitable surfaces and substrates contact Sealtec on 0800 179 000 for correct advice on surface preparation and suitability.
5 Incompatibility with other Building Materials
- Not to be used in areas where solvent or petroleum based products may be spilled.
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- Not to be applied to glass, perspex, and plastic or glazed surfaces.
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Product Appraisal by BEAL
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The Master Roof product has received BEAL Appraisal Number M717
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Warranty
NZBC Compliance
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When installed according to the manufacturer’s instructions, the Master Roof Liquid Applied Membrane System will meet the Durability performance requirements of NZBC B2.3.1(b) being 15 years and the External Moisture performance requirement of E2.3.2
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Methods used for verifying compliance with the relevant performances of the New Zealand Building Code, include Testing and Assessment by a laboratory, Ease of Installation assessment, Assessment of data provided by the manufacturer, and the In-service history overseas and in New Zealand. Details are available from the distributor. |
Ecological Statement
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Components of the Master Roof Liquid Applied Membrane System have been tested regarding their impact on the environment.
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Copies of test results are available at sealtec.co.nz, covering :
- Drinking water
- Radon diffusion
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