What to use to cover bitumen rubber on roof?

[Cedes]

I need to choose which one of the following to use over the bitumen paint on the roof.

Bunnings AI

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• Bunnings AI

  Need help deciding if the Gripset Betta 1L Waterproofing Membrane Bitumen Rubber is right for your needs? Ask me anything.

  Is it suitable for outdoor use?Can it be painted over?How long does it take to dry?
• Can it be painted over?

• Bunnings AI

  Yes, the Gripset Betta 1L Waterproofing Membrane Bitumen Rubber can be painted over. It is a versatile product that can be used as both a waterproofing membrane and a bitumen paint. If you are planning to use it as a paint, you should dilute it with water in a 1:1 ratio as per the instructions.

  If you need guidance on the best type of paint to use over this membrane or advice on proper application, please let me know! Would you like more details on the painting process or have any other questions about this product?
• Yes. What paint can be used

• Bunnings AI

  Could you please clarify what type of paint you're looking to use over the Gripset Betta Waterproofing Membrane Bitumen Rubber? Are you interested in exterior paint, interior paint, masonry paint, or another specific type? This will help me recommend the most suitable options for your project.
• Roofing paimt

• Bunnings AI

  Here are some search results for roof paints, roof spray sealants, roof waterproofing coatings, and roof treatment concentrates you might like:

  

  Selleys 310g Translucent Roof And Gutter Silicone Sealant

  4.6 (32)

  $14.45

  

  Fastfix Wet Shield 1kg One Coat Instant Waterproofing

  4.1 (8)

  $41.92

  

  Ametalin 1500mm x 30m SilverSark HD Reflective Roof and Wall Insulation

  5 (2)

  $94.82

  

  Selleys 315g Roof and Gutter Spray Sealant

  3.9 (18)

  $24.50

  

  30 Seconds 5L Roof Treatment Concentrate

  4 (25)

  $55.49

  View more
• Can i use these on top of bitumen?

• Bunnings AI

  Some roof paints and coatings are suitable for application over bitumen-based membranes, but it's important to check product compatibility for best results and longevity.

  Here’s what you should consider for the products listed above:

  • Selleys Roof and Gutter Silicone Sealant: Designed for sealing gaps and cracks on various roof materials (metal, tiled, concrete, etc.) and can be used over bitumen, but it is a sealant rather than a paint or coating. It may not provide an even, paint-like finish.

  • Fastfix Wet Shield One Coat Instant Waterproofing: Suitable for most common roofing surfaces, including bitumen. This is a reinforced waterproofing compound and can be used as a protective top coat.

  • Crommelin High UV Resistant Roof and Wall Waterproofing: Crommelin membranes are typically compatible with bitumen and can be applied over existing bitumen membranes (confirm with manufacturer guidelines for the specific surface prep required). Once cured, they can be overcoated with acrylic paints.

  • Dulux Weathershield Exterior Paint: Generally designed for direct application on masonry, concrete, and metal. If you wish to use it over bitumen, ensure the membrane is fully cured, and confirm with Dulux or test a sample area first as adhesion may vary.

  • Other products (spray sealants, cleaning treatments, insulating foils): These are not designed as top coats or paints for membranes and may not be compatible.

[EricL]

Hello @Cedes 

Your other query in regards to using the shellac-based coating is more promising than the ones you have mentioned here in your discussion. I highly suspect these products will not be able to cover the surface of the bitumen paint and its black rubber-like substance will stain the surface of these products.

In regards to Fastfix, Crommelin and Dulux Weathersheild, I can only suggest doing a sample test to see if it will adhere properly and is compatible with the bitumen surface.

If you have any other questions we can help with, please let us know.

Eric

[MitchellMc]

Hi @Cedes,

According to the manufacturer, the Gripset Betta waterproofing membrane is not to be finished over with tiles, renders, paints or other surface finishes. So, it's not suitable to be painted. Could you tell us a little more about your project, like what you are trying to repair, and we can look for solutions that are able to be overcoated with paint?

Mitchell

[Cedes]

I have filled a roof join 18 feet long with bitumen paint. Now I need to paint over the bitumen paint . 

[MitchellMc]

I'm so sorry, but after contacting a number of our paint suppliers, I haven't been able to locate a system that would allow you to paint over the bitumen on a roof @Cedes. The next best option I can think of would be to add a cover strip over the roof join and paint it to match your roof instead. Something like the Metal Mate 50 x 3mm 2m Galvanised Steel Flat Bar might suit. It could be installed by running a thick bead of Sikaflex11FC down the join and pressing the cover strip into it. This would also add another layer of water penetration protection to the area. The galvanised bar can then be painted with Dulux Weathershield.

Mitchell

[Cedes]

I tried flashing already but it rusted between layers. I had to remove it.

[EricL]

Hello @Cedes 

Have you considered using flat aluminium bars as a cover? There is also the Grunt 50mm x 10m Flashing Tape which is a flashing with an aluminium foil surface and a bitumen sealer at bottom.

Eric

[Cedes]

I tried flashing. It just caused more rust. And the flashing aluminium tape also did not stop the rain getting in.

[MitchellMc]

Hi @Cedes,

I think Eric was referring to the flashing tape, not to prevent leaks, but to cover the black bitumen paint with a silver flashing. Perhaps the silver would look better than black on your roof?

MItchell

[Cedes]

I am actually after a Bitumen sealer. What's a good sealer for bitumen? That's what I am needing all along. A sealer to seal the bitumen rubber paint lol.