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.

[MitchellMc]

Hi @Cedes,

You actually don’t need a separate sealer. Bitumen rubber paint is already a fully waterproof, UV-resistant coating. It’s designed to seal itself, so applying another sealer isn’t necessary.

Mitchell

[Cedes]

I thought that too but it's bleeding a bit and still leaking in places. I wonder why? What do you think I should do?

[JacobZ]

Hi @Cedes,

Do you have any photos of where it is bleeding through?

It might just need another coat of bitumen paint. Usually, you'd use 2-3 coats of bitumen paint to ensure there are no splits or gaps in the coating that water can seep through, so adding another coat over these areas is likely the simplest option.

Let me know what you think.

Jacob

[Cedes]

I don't have any photos because I wiped it all off. I did apply 2 thuch coats though...

[MitchellMc]

Hi @Cedes,

Thanks for sharing the details so far. From what you’ve described, it sounds like there has been a leak on the roofing sheet, and you’ve applied two coats of bitumen paint to try to fix it. Bitumen paint is generally intended for minor surface repairs or very fine leaks. It is not designed to seal substantial leaks or fix areas where the sheeting or flashing has failed.

To give better advice, it would be really helpful if you could upload some photos of the repair you made and the areas where it was still leaking or bleeding through, even if you’ve wiped it off since. That will give us the context we need to understand what’s happening and offer practical guidance.

From your description, it seems the underlying issue may be with the roof sheeting or flashing rather than the bitumen coating itself. In most cases, the proper approach is to repair or replace any failed sheets or flashing, and then use bitumen paint as a protective top coat rather than relying on it to stop a leak entirely.

Once we can see the area and understand the situation more clearly, we’ll be in a much better position to suggest a solution that will work long term.

Mitchell

[Cedes]

Yes I did use that on the very first waterproofing attempt. It still leaked. I just don't get it. I can't for the life if me see how the rain is still getting in.

[Cedes]

The tape causes rust under it, I found, when I first tried it. I had to take ot off. It was really hard to remove. There was so much rust we had to use a grinder to buff it off.

[Cedes]

 

 

 

 

[Cedes]

You can see how the roof would fold down into a large suitcase type structure. 

[Cedes]

That last pic shows the front. That folds in to the free standing  base and then the roof folds down onto it. That's why there's a gap. When it folds up, it's not quite flush. Almost, but 1/8 of an inch out.