Dr Fixit 653 Roofseal Select Grey 4L

Dr. Fixit Roofseal Select (formerly known as Dr Fixit NewCoat) is a heavy duty terrace waterproof coating system, composed of specially developed highly elastic & resilient acrylic polymers, properly selected & graded fillers, lightfast & weather durable pigments, micro-fibres, additives & best quality fungicidal in water medium. It is used as a liquid applied waterproofing membrane for all types of building terraces. Dr. Fixit Roofseal Select is a three-layer system with coats in different colours ensuring proper build-up of the thickness, making it a reliable waterproofing system. The coating performance can be enhanced by providing a fibre mesh that is embedded or sandwiched between the coats

Areas of Application

Over existing building Flat/ Slope roof surface like

• Brick-Bat Coba finish surface
• Cement mortar screed
• China mosaic tile roofs.

Features

• Film thickness – Provides higher dry film thickness of 1 mm in three coat application
• Crack bridging - Bridges cracks up to 2 mm width
• Application advantage - No need to remove existing sound brickbat coba, plaster, concrete surface 
• Suitability - Can be used for flat as well as sloping roofs 
• Strength - Higher tensile strength, tear resistance & bond strength with cementitious substrates 
• Resilience – Forms highly elastic & resilient coating so helps to withstand the structural movements 
• Durability – Resistant to UV & weather conditions 
• Abrasion resistant – No additional protective coating is required for roof subjected to foot traffic 
• Ease of application – Can be applied by brush & roller easily 
• Weight addition – Light in weight does not add extra weight over the roof 
• Toxicity – It is non-toxic in nature 
• Breathability – It is breathable 
• Easy to recoat existing surfaces coated earlier with Dr. Fixit Roofseal Select

Surface Preparation

• Roof substrate must be pressure-washed with water with, a minimum working pressure of 1,400 psi is to be used to and/or remove all dirt, dust, chalking and waste products.
• When encountering roof substrates that have living organisms such as algae, mold or fungus, should be clean with 3:1 bleach solution or biowash shall be used to kill and remove these organisms during the roof cleaning.
• All new cement-sand, freshly laid screed / IPS surfaces should be allowed to age at least 12 weeks before application of topcoat surface coating.
• Ensure that the roof slope have a minimum of 1 in 80 or 100 is already provided.
• Check the soundness of the top screed, half round angel fillet / unsound plaster on vertical surface / joints surrounding pipe ducts of rainwater outlet, look for de-bonding signs by tapping with nylon hammer.
• Ensure there is a 1 water drain outlet of minimum 100 mm dia for 500 Sq. Ft floor area and gaps around pipe inserts should be sealed properly with polymer modified mortar.
• Stagnant water due to undulation in the roof surface should be marked and repaired with PMM.
• All joints / corners / penetration points, rainwater outlets, marble / tile strip joints should be grouted with PMM.
• Ensure that all penetration points, mechanical equipment, HVAC & solar panels are suitably placed on the up stands and rounded with angle fillet.

Repair and Polymer Modified Mortar (PMM) treatment for damaged or de-bonded terrace surface

• Check the existing roof surface with nylon hammer and remove the existing unsound, de-bonded screed, surface defects, etc. Break and remove the hollow sound screed and plaster surface with mechanical cutter.
• Clean the surface and brush apply a bond coat of Dr. Fixit Pidicrete URP mix in the ratio of 1:1 (URP 1: Cement 1) by volume to make it lump free slurry when applied on in the pre wet surface.
• Mix Dr. Fixit Pidicrete URP 10% by weight of cement in (M20) concrete in ratio of 1:1.5:3 i.e., one bag of 50kg cements: 1.5 times volume of sand: 3 times volume of aggregates: 25L water. Level the repair mortar and finish with trowel.
• Moist wet curing must be done up to 3-4 days. Prolonged wet curing will minimize the chances of cracking and improve the physical properties.

Treatment of Roof with Stagnant Water

• Make the surface rough by hacking and chipping out the undulations portion. Extend it on the larger area for creating slop towards drain.
• Apply a bond coat of Dr. Fixit Pidicrete URP mix in the ratio of 1:1 (URP 1: Cement 1) by volume to make it lump free slurry when applied on in the pre wet surface.
• Prepare the Polymer modified mortar (PMM) mixing with Dr. Fixit Pidicrete URP 10% by weight of cement in the ratio of 1:3 when the bond coat is tacky, finishing with trowel.
• Moist wet curing must be done up to 3-4 days.

Crack treatment - Cracks on Screed

• All visible hairline cracks more than 0.50mm and not giving hollow sound, on the IPS/screed or at the junctions of flat roof & vertical parapet wall, pipe joints, should be checked.
• Cut and widen all cracks in V shape with mechanical cutter in the size (6mm W x 6mm D).
• In case of pours surface apply Dr. Fixit Pidiprime A on the well-prepared groove, allow to cure tack free. Fill the cracks with Dr. Fixit PU Sealant covering the entire area uniformly with suitable gun. Allow sealant to cure a minimum 24 hours.
• Apply minimum 50mm - 100 mm width 45 GMS Glass Fibre Mesh / non-woven geo textile fleece with the coat of Dr. Fixit Roofseal Classic along the length of crack when the 1st coat is still in wet condition. Apply the second coat with an interval if 4-6 hours.

Application of Roofseal Select – Waterproofing

• Stir well prior to application. All joints/corners/drainage outlets and penetration points shall be treated prior to all application of Dr. Fixit Roofseal Select. All corners, gaps, joints, protrusions and outlets should be coated with an extra coat incorporating reinforcing fabric.
• To ensure proper adhesion surface should prime with a single coat of Dr. Fixit Primeseal dilute with water in the ratio 2:1 spreading at the rate of 8-10 /Sq.mt /Litre Substrate MUST be in SSD condition for application of primer.
• Apply 1st coat of Dr. Fixit Roofseal Select at the rate of 2.0 sqmt / litre/ coat. An open 45 Gsm glass fibre mesh of 2.5 mm x 2.5 mm must be sandwiched between the first and second coat. While the 1st coat is still wet, place the fibre mesh on it.
• Apply second coat of Dr. Fixit Roofseal Select with the same application coverage. Application direction of second coat should be perpendicular to that of the first coat. Check to see no void surface is left uncoated with second coat. Allow second coat to dry for 6-8 hours.
• Apply third coat of Dr. Fixit Roofseal Select at an application direction that is perpendicular to that of the second coat with same application coverage rate. Check to see no void surface is left untreated / uncoated.
• Allow the first coat to dry for approximately 4-6 hours before applying the 2nd coat at 90° to the first coat. Ensure there are no pinholes or air bubbles on the membrane surface.
• The sequence of colours of Dr. Fixit Roofseal Select can be decided depending on the desired top coat colour.
• Allow the system to air cure for 7 days minimum.
• For vertical surfaces and parapet walls should be enveloped & coated / painted with Dr. Fixit Raincoat Classic Waterproof coating system.

Maintenance & Recoating Of Dr. Fixit Roofseal Select

Over a period of time or some years, if Dr. Fixit Roofseal Select has developed cracks on exposure to weathering or extreme temperature variations, it is extremely easy to recoat over it again. Cracks if any can be cut in v grove and filled with PU sealant. Placing a 45gsm glass fibre mesh over a recoat, after properly cleaning and sanding the surface. Apply coats and check to see no void surface is left uncoated with second coat. Allow second coat to dry for 6-8 hours.

Pond Test

Conduct a pond test 7 days after application of Roofseal, for 24 hrs, stagnated with water for 50mm height.

Precaution & Limitations

• Do not apply if rain is expected within 48 hours after application.
• Do not apply Dr. Fixit Roofseal Select over expansion or moving joints directly.
• Do not apply if the surface temperature is greater than 35°C or below 10°C, or likely to fall below 10°C during the application or drying period.
• Pidilite Industries does not give any warranty against dirt pick up on Roofseal Select.
• Not recommend for roof area more than 500 Sq.mtr.
• Apply Dr. Fixit Primeseal Plus on smooth - Nonporous surfaces like Marble, Granite, glazed ceramic tiles & clay tiles, not recommend for application on Kota, & Kadappa stone, Mud phuska roof with brick tiles, Bituminous treatment.