
About the product
Waterproof your roof with a brush, no torch, and no risk
Bioscud BT is a ready-to-use, water-based thixotropic elastomeric bituminous waterproofing agent for flat and pitched roofs, bituminous membranes, and concrete structures. Its great advantage over traditional systems is that it is applied without flame: no torch or rolls to weld. It is spread with a brush, roller, or airless spray and forms a continuous waterproof layer, without joints or overlaps, which is precisely where asphalt felt fails.
APPLIES TO OLD ASPHALT FELT: it is specifically formulated for the functional restoration of aged bituminous membranes. There's no need to remove the old roof, which drastically reduces the cost and time of the intervention.
Why choose Bioscud BT
- ✓ Safe flame-free application: eliminates fire risk and the need for specialized personnel.
- ✓ Continuous waterproofing without joints, avoiding the typical discontinuities of rolled systems.
- ✓ Elastic emulsion: accommodates the movement of deformable substrates without breaking.
- ✓ Resistant to standing water, making it suitable for roofs with poor drainage and tanks.
- ✓ Resistant to UV rays and atmospheric agents.
- ✓ Ready to use: water-based, no solvents or prior mixing.
Technical data sheet
| Base | Water-based elastomeric bituminous emulsion |
| Consistency | Thixotropic, ready to use |
| Elasticity | High, suitable for deformable substrates |
| Color | Black |
| Application | Brush, roller, or airless spray equipment |
| Use | Exterior |
| Coverage | Approx. 2 kg/m² |
| Packaging | 16 kg, 4 kg, and 1 kg containers |
| Storage | Approx. 18 months in original sealed container |
At 2 kg/m², the 16 kg container covers about 8 m², the 4 kg container about 2 m², and the 1 kg container half a square meter. For a complete roof, calculate using the 16 kg format.
Where it's used
Flat or pitched roofs, new or being restored; concrete structures exposed to the elements; rehabilitation of aged bituminous membranes and asphalt felt; and water storage tanks or containment areas, thanks to its resistance to stagnation.
How to apply
- Clean the substrate: remove dust, grease, oil residues, and loose materials.
- Apply the undiluted product with a brush, roller, or airless spray equipment.
- Spread evenly in two or more crossed layers until the desired thickness is reached.
- Allow to dry completely between coats.
Application conditions
Do not apply in rainy conditions or with risk of frost.
Avoid application at temperatures below 5 °C or humidity above 80 %.
Protect the surface from dust and atmospheric agents during drying.
Complete the intervention
Is there deteriorated concrete under the roof? — Geolite 10 or Geolite 40, R4 geomortars that passivate the reinforcement.
Are you tiling over the waterproofed area? — Nanoflex Sin Límites, compatible with Kerakoll waterproofing systems.
Does the facade need rendering? — Monocapa Poli WR, CSIII class water-repellent render.
Need to fix elements on the roof? — Prestocem ECO, water and frost resistant.



















