Elastic waterproofing coating for flat roofs and terraces with leaks
Humix Paint Cool Roof Therm
Is it for you?
- Yes: Water gets in from above: roof or terrace
- Yes: Walkable once cured (24–48 h)
- No: Not for condensation or rising damp
- Waterproof
- Elastic
- Walkable
- No tar or asphalt
- 5 colours
7,04 €/L
≈ 2,81 €/m² · covers about 10 m² with all coats The kit seals about 7 m² and paints about 10 m²
Free delivery from 59,90 € 24–72 h (working days) to mainland Spain 30-day returns on unopened tins
- Shipping from €2.90 · free over €59.90
- 24–72 h working days (mainland)
- Free returns within 30 days
Elastic waterproofing coating for flat roofs and terraces with leaks
- Shipping from €2.90 · free over €59.90
- 24–72 h working days (mainland)
- Free returns within 30 days
All about Cool Roof Therm
In what order?
- Cool Roof Therm: stop the water where it gets in, from outsideYou are here
- Wait for the inside wall to dry (it can take weeks)
- Redo the inside with a breathable finish: Condensation Kit View MATE5000
What it is and what is in it
An elastic, water-based coating with graphene and glass microspheres that forms a continuous waterproof layer over your flat roof or terrace. It works its way into small cracks and adapts to the shape of the surface.
- Waterproof. Waterproof against rainwater. No tar, asphalt or plasticisers.
- Elastic. High elasticity and tensile strength: it adapts to the shape of the roof.
- Continuous layer. Works its way into small cracks to form a continuous, elastic waterproof layer.
- Walkable. Can be walked on once fully cured.
Where it goes
Not for: Not to be applied on a wet or sun-heated surface. It doesn't treat rising damp or condensation.
What's inside
- Inorganic pigments. Stable in light and weather: white, grey, red, tile red or green.
- Glass microspheres. Part of the formula, according to its technical data sheet.
- Graphene (CaCO₃® Technology). Part of the formula's technology.
- Elastic water base. Forms the continuous, waterproof, elastic layer.
In your order: the sealed tin in the size and colour you choose. The reinforcing mesh for cracks and joints is not included (sold in hardware stores).
How to apply it5 steps, in this order
Don't apply in direct sunlight or on a sun-heated surface. Thin coats are better than one thick one.
- Pick dry days
The surface has to be dry. Work between +5 °C and +40 °C, out of direct sunlight.
Time: Before · Tool: Weather forecast
- Clean the roof
Leave the surface sound, well bonded and free of debris: sweep, remove loose material and let it dry.
Time: 1–2 h · Tool: Broom and scraper
- Reinforce weak points
On cracks, joints and junctions, apply one coat and embed a polyester mesh (sold in hardware stores) on top.
Time: Before the general coats · Tool: Brush and mesh
- Thin coats
Start with edges and junctions. Several thin, criss-crossed coats, one a day, without overloading the roller. Too much product per coat can cause micro-cracking.
Time: Once the previous coat is dry · Tool: Roller and brush
- Let it cure
Don't walk on it or get it wet until it has fully cured: usually 24–48 h, depending on temperature and humidity.
Time: 24–48 h
Coverage and how much you need
| Size | Covers | Price | Per m² |
|---|---|---|---|
| 4 L | A small terrace · ≈ 10 m² | 28,14 € | 2,81 € |
| 15 L | A flat roof · ≈ 40 m² | 97,26 € | 2,43 € |
Label coverage: 4 L ≈ 10 m², 15 L ≈ 40 m² counting all coats. On cracks and joints, reinforce with a polyester mesh (sold in hardware stores).
Technical data sheet and PDF
- What it is
- Elastic, liquid-applied waterproofing coating, water-based
- Use
- Horizontal outdoor surfaces: flat roofs, terraces, domes, vaults, overhangs and party walls
- Colours
- White · Grey · Red · Tile Red · Green
- Coverage
- 4 L ≈ 10 m² · 15 L ≈ 40 m² (all coats)
- Application
- Several thin, criss-crossed coats, one a day
- Finish
- Elastic, continuous waterproof layer
- Walkable
- Once cured (24–48 h)
- Preparation
- Dry, sound, well-bonded and clean surface
- Tools
- Roller and brush; polyester mesh on cracks and joints (sold in hardware stores)
- Base
- Water-based, with graphene and glass microspheres
- Application temperature
- +5 °C to +40 °C, out of direct sunlight
- Sizes
- 4 L · 15 L
- Shelf life
- 12 months unopened, in a cool, dry place, protected from frost and sun
- Limits
- Only for roofs and horizontal outdoor surfaces; doesn't treat rising damp or condensation
What it does and what it does not
What it does
- Here you do treat the source: you waterproof the roof where the water gets in.
- Applied well, it can last for years with maintenance.
What it does not
- It does not repair structural damage or active cracks: they must be fixed first.
- Painting only on the inside does not stop a leak.
Cause first. When water leaks in through a flat roof or terrace, Cool Roof Therm works on the point of entry from above. Check drains, joints and junctions too. If the stain is at the bottom of the wall, it isn't a leak: look at rising damp.
And if it does not work?
- Before you buy. Send us a photo and a member of our team will tell you for free whether this is the product you need. If it isn't, we'll say so.
- If the stain comes back. Send us photos and we'll look into why, for free. Usually the cause is still active: we'll tell you how to deal with it.
- 30-day returns. To return unopened tins, no questions asked.
- Legal guarantee. If the product has a manufacturing defect, you're covered by the legal guarantee.
Frequently asked questions7
Is it right for my case?
Yes, if water gets in from above: flat roofs, terraces, domes, overhangs or party walls. It works right where the water gets in: it forms a continuous outer layer that is waterproof against rain. It isn't for damp rising from the ground or for condensation.
How much do I need?
According to the label, with all coats: 4 L ≈ 10 m² and 15 L ≈ 40 m². Enter the m² of your roof in the calculator above and it suggests the combination.
How is it applied?
Look for two or three dry days in a row, between +5 °C and +40 °C. Sweep, remove moss and debris and let it dry. On cracks, joints and junctions, apply one coat and embed a reinforcing mesh for waterproofing products (sold in hardware stores) on top. Then several thin, criss-crossed coats, one a day, starting with edges and junctions.
When can I walk on it?
Once it has fully cured, usually 24–48 h after the last coat, depending on temperature and humidity. Until then, don't walk on it or get it wet.
What about the mark inside?
First stop the water getting in. Once the inside wall is dry, which can take weeks, redo the interior with a breathable finish such as the Condensation Kit.
What if water keeps getting in?
It can happen if water gets in through a drain, a joint or a junction that hasn't been treated. Send us photos of the mark and the roof and we'll look at where it's getting in, free of charge. If you haven't opened it, you have 30 days to return it for free.
How long does delivery take and how much does it cost?
24–72 working hours on the mainland; to the Balearic Islands, the Canary Islands, Ceuta and Melilla it can take a few more days. Free shipping from €59.90; below that, €2.90 on the mainland and €12.90 to the Balearic Islands, the Canary Islands, Ceuta and Melilla. Colours: white, grey, red, tile red and green.
Shipping and returns
- Mainland Spain: €2.90, 24–72 working hours.
- Balearic and Canary Islands, Ceuta and Melilla: €12.90; it may take a few more days.
- Free shipping on orders from €59.90.
- Free returns within 30 days with the tin unopened.
- Mon · Day 0 You place your order With the quantity already worked out.
- Tue–Thu · 24–72 h Your order arrives On the mainland. To the Balearic Islands, Canary Islands, Ceuta and Melilla it may take a few more days.
- Fri · Morning Clean and reinforce Mesh on cracks and first coat.
- Sat · Morning Second coat Thin, once the first is dry.
- Sun · Curing Keep off it Until it has fully cured.
