I'm thinking of applying nippon flexiseal or nippon flex 200 to fix the leak. Do you know which one is better?

Any other recommendation other than the above 2?

epoxy?

Both ok. Is your preparation work that is important.

Dont expect to last forever.

I used Penten brand.

This post has been edited by mini orchard: Aug 7 2021, 05:30 PM

No, below is what I found in their website

FlexiSeal Elastomeric Membrane is a mastic positive water proofing which formulated based on elastomeric styrene acrylic polymer for exterior application.

Nippon FLEX 200 is a single component, elastomeric, breathable, acrylic copolymer liquid apply waterproofing coating.

I've not done it before.
I'm thinking scraping off any old paint and then rub it with sand paper . After that use wet cloth to wipe off any excess powder left off from sand paper rubbing.

For flex 200 they suggest to put fiberglass mesh for better result.

This post has been edited by abm: Aug 7 2021, 06:38 PM

Use a pressure washer to clean the surface. It saves you time and energy than using sand paper.

Then let it dry for a day or two.

Thereafter follow product instructions. Let the 1st coat to dry completely b4 applying the next coat. A 3rd or 4th coat is no harm if product says 2.

Use a good brush and roller.

Any photo to share ?

Thank you for the tips.

It's better to apply / wet the surface with latex admixture, let it dry before apply primer and top waterproofing membrane. Last much longer than without or seal the crack with crack sealer such as Sikadur-20 Crack Seal.

It's better to apply / wet the surface with latex admixture, let it dry before apply primer and top waterproofing membrane. Last much longer than without or seal the crack with crack sealer such as Sikadur-20 Crack Seal.

Thank you for your reply.
I read from manufacturer's recommendation, to strengthen the coating, lay a layer of fiberglass mat in between the coat.
Is there a specific type of fiberglass mat for this or any fiberglass mat will do?

u will need the thin (chopped strand fiberglass mat). IIRC it cost around 6.50-7.50/m². wear glove when installing..the strands can cut easily.

don't buy the 1-2 inch thick fiberglass blanket used for roof insulation

Try SikaCoat 500 Super


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Just apply torch on membrane.

Has anyone got experience/reviews btwn choosing Nippon Flex 200, Nippon flexiseal or Dulux Aquatech for painting balconies, car porch roof(flat) and roofs? They all seem similar products, self priming waterproof paint for the retail market.