Membryl Cool Roof

Cập nhật ngày Thứ bảy, 10 Tháng 10 2015 13:51 Viết bởi crommeluan Thứ tư, 05 Tháng 1 2011 16:18

Technical Data.

	Reflective properties aid in reducing internal air temperatures by up to 20^oC. Aids in reduction of CO₂ emissions. Energy and cost efficient. Resistant to chemical attack. Very high adhesive strengh - no primer required on most surfaces Weatherproof and lightfast. Fungal and algal resistant in high humidity environments. Excellent dirt pick up resistance. Tough - high tensile strengh and hardness. Low VOC.
Note: The above results are a product of in house testing base on current industrial standards. It should be noted there is currently no APAS regulation regarding the insulating/ heat reflective properties of roof coatings
Number of Coats: Refer Specifications Spreading Rate Per Coat: Refer Spec Wet Film Per Coat: Refer Spec Recoat (@25^oC): 4-6 hours	Curing time: 28 days Colour: Range of colours Thinner: Water Shelf Life: 12 months
Properties	Test Method	Test Results
VOC	ASTM D-2369	14 g/ L(Low)
Tensile Strengh	ASTM D412	20N or 3.66MPa
Elongation	ASTM D412	140%
Durometer Hardness	ASTM D2240	Durometer "A" value 78.5
Direct Tension Adhesion Strength	ASTM D4541	2.0N/mm² or 2.0Mpa
Mandrel Bend Test	AS 1580.402 ; ISO1519	Pass-no cracking, flaking orpeeling observed
Water Vapour Transmission	ASTM E96	35.6g/ m²/ 24 hours
Water Permeability	ASTM E96	1.47 x 10^-7 g/Pasm²
Moisture Vapour Diffusion Coefficient Moisture Vapour Diffusion Resistance Coefficient Moisture Vapour Equivalent Air Layer Thiskness	ASTM E96	4.3 x 10^-5 cm² sec^-1 5920 1.21m
Oxygen Diffusion Coefficient Carbon Dioxide Diffusion Coefficient Diffusion Resistance Coefficient Equivalent Air Layer Thickness Equivalent Thickness of Concrete	Taywood in - house test method Section 5.4 (Gas Dispersion Test)	2.9 x 10^-7 cm² sec^-1 4.9 x 10^-7 cm² sec^-1 305800 64m 16cm
Chemical Resistance 10% W/V Sodium Hydroxide 10% W/V Nitric Acid	Taywood in - house test method (as nominated)	1 hr - temporary effect 3 hrs - temporary effect 1 hr - no visible change 3 hrs - no visible change
Fire Propagation Surface Spread of Flame	BS.476: Part 6 BS.476: Part 7	3.3 Fire Propagation Index Class 1
Resistance to Artificial Weathering 1000 hours 4000 hours	AS/NZ 1580.483.2	Satisfactory-no defects Satisfactory-no defects
Biological Resistance Fungal 1 month(accelerated) Algal 6 month(accelerated)	Thor in - house Accelerated Testing	Excellent Film Fungal Protection Excellent Film Algal Protection

Application Guide.

Surface Preparation

Surface should be clean, structurally sound & contaminant free. If necessary, appropriate repairs should be carried out.
Exposed reinforcing bars are to be cleaned of rust prior to repair. If cementitious product are used they should be cured for a minimum of 7 days, however 28 days is preferable.
Surface should be dry but reasonable dampness without visible moisture is acceptable.
Remove contaminants such as grease and oil with detergent and water. Areas showing fungal or algal growth should be pressure water jetting, abrasive blasting or mechanical/ hand wire brushing.
Porous(but sound)surface can be primed with thinned coat of Membryl (a mix of 2 parts of Membryl to 1 part of clean fresh water is recommended) applied by spray, roller or brush.
Painted areas should be checked for soundness. Remove loose paint and prime area with CROMSEAL Bind Back.
Cracks or joints displaying non-active crack wider than a hairline should first be filled with proprietary filler. All active cracks and expansion or construction joints are to be cleaned to acommodate a backing rod combined with proprietary elastomeric filler.

Application Procedure and Equipment

Membryl can be applied using roller, brush or airless spray.
Adhere Polyfab BB with its bond-breaker section over the treated movement rea. Fold back unadhered fabric on both sides. Apply Membryl to the surface and while it is wet embed the fabric. When dry, apply Membryl over treated sections. Allow to dry berofe the application of the membrane.
Pre-Existing sealants/mastics - ingeneral Membryl can be directly applied to most mastics, however non-paintable silicones are not suitable. If it is silicone or it can not be identified, apply Polyfab BB over the area as detailed above, before treating with Membryl.
Upright angles and protrusions - sharp corners formed by vertical and horizontal junctions such as parapets and pipes, etc., should be detailed in a similar fashion with Polyfab BB as detailed above.
The ends of vertical membranes should be protected to avoid ingress of water behind the membrane. On parapet walls, if possible, the membrane should be carried to the top and slightly down on the other side thus totally eliminating water ingress. On high vertical walls or protrusion the horizontal membrane should be turned up approximately 200mm and applied into a reglet ( 5mm wide and 10mm cut)and / or covered with a down - turned protective flashing.
Do not apply below 10^oC, or when relative humidiyt is above 85% or when rain is imminent.
Do not allow ponding to occur between coats or before system is fully cure (normally 7 days after application of final coat). Water should be swept off or mopped during curing period to avoid damage.