Waterproofing sheet of SBS modified bitumen with mineral self-protection.
Product variations:
BBA 10/4787 (1) BBA 10/4787 (1)
EPD S-P-01493 EPD S-P-01493
ETE 06/0058 ETE 06/0058
POLYDAN PLUS F.M. 50/GP ELAST. is a waterproofing bituminous sheet with self-protected surface of 5.0 kg/m². Composed of a reinforced and stabilized polyester felt reinforcement, covered on both sides with SBS modified bitumen mastic. On the upper side of the sheet, slate in grey (dark) colour is used as protective material. The anti-adhesive material used on the lower side is polyethylene film.


  • Multilayer membrane top sheet for roof waterproofing with mineral self-protection.
  • Self-protected single-layer membrane mechanically fixed on deck roof, both in new construction and renovation.
  • Single-layer membrane for waterproofing bonded self-protected roofs.

Advantages & Benefits

  • High static and dynamic piercing resistance.
  • Self-healing and Rot-proof.
  • Good absorption of structural movements.
  • The mineral finish gives the sheet UV resistance.
  • Great dimensional stability.
  • High tensile strength and high elongation at break.
  • High resistance to tearing.
  • Total impermeability to water and water vapour.
  • Allows for adaptation to any type of geometry.


  • Roofs with heavy bonded, unbonded or floating and self-protected bonded protection.
  • Over compatible thermal insulation.
  • Concrete supports
  • Mortar supports

Instruction for Use

Preparation of the substrate: The surface of the base substrate must be resistant, uniform, smooth, clean, dry and free of foreign bodies.
In the case of thermal insulation, the boards shall be laid in a grid and without gaps of more than 0.5 cm between boards.
Self-protected single-ply membrane mechanically fixed on deck, both in new construction and renovation (GF-3 membrane according to the UNE 104-402/96 standard). The rolls are laid loosely on the waterproofing support (thermal insulation or old waterproofing, in the case of renovation), starting at the lowest point of the roof skirt and perpendicular to the ribs of the corrugated sheet, forming a row of sheeting. The transverse overlap of the rolls in each row shall be 12 ± 1 cm and shall be fully welded with a blowtorch. It is mechanically fixed in the area of the longitudinal overlap that will later be covered with the next row of sheeting (highest part of the roof). The distance from the edge of the washer of the fastening to the edge of the sheet shall be between 2 and 3 cm. The minimum distance between fixings shall be 18 cm and the maximum distance 36 cm and shall be on the ridge side of the corrugated sheet. The roll of the next row is laid out, welding the overlap where the fasteners are located. The longitudinal overlap width shall be 12 ± 1 cm and shall be fully welded with a blowtorch. The transverse overlaps of two consecutive rows shall not coincide. The roll of the next row is mechanically fixed on the other edge, with the same premises as described above. The approximate distance between rows of fixings will be 88 cm. The recommended fixing will be the one used in the DITE Polydan Plus FM system and will consist of a double thread self-drilling screw, diameter 4.8 mm, with a length of 65-75-90-110-140 mm (depending on the thickness of the thermal insulation board), with a flat head of 12 mm diameter, made of Supracoat 2C treated galvanised steel, with a corrosion resistance of 15 Kasternich cycles and a galvanised steel split washer, with a 2C protection treatment, square section and dimensions 40×40 mm, with a thickness of 8/10 mm, and with a hole diameter of 4.8 mm. For the use of other types of fasteners, consult the fastener manufacturer.
At parapets and raised expansion joints, the bottom reinforcement sheet (Esterdan 30 P Elast Reinforcing Strip 0.30 or 0.48 cm wide) shall cover and overlap the edge of the washer by at least 4 cm. The density of fixings is determined by the wind pressure on the roof, which is a function of the geographical area, building height, roof area (corner, edge or central area), type of building (open or closed), etc…, increasing at the perimeter (edges and corners). The distance between fixings within the same row shall be not more than 36 cm and not less than 18 cm. The distance between rows of fixings shall be 90 cm. If it is necessary to increase the density of fixings at edges and corners due to wind suction, these shall be arranged in complementary lines or rows (one or two). In this case, an auxiliary layer of Esterdan FM 30 P Elast reinforcement will be laid with the extra rows of fixings and to which the Esterdan FM 30 P Elast will be welded. If a calculation of the fastener density is required, please contact our Technical Department. Multilayer membrane top sheet with mineral self-protection. The sheet is laid in the same direction as the bottom sheet, with the overlap line offset by approximately half the roll. The sheet is fully welded to the bottom sheet with a blowtorch. The overlaps are to be welded and shall be 12 cm in both the longitudinal and transverse directions. To join the transverse overlap at the ends of the rolls, it is necessary to heat the transverse edge of the lower sheet in a strip of 12 cm, eliminating or embedding the protective aggregate in the bituminous mass and then weld the end of the next piece.
Self-protected single-layer membrane, adhered system. The adhesion of the membrane to the substrate is done with a blowtorch. In the case of mortar or concrete substrates, a bituminous primer (Curidán, Impridán 100, Maxdán or Maxdán Caucho) must be applied beforehand. If the substrate is a weldable thermal insulation board, i.e. finished in asphalt (Rocdán A or Rocdán PIR VA), the primer is not necessary. The overlaps are to be welded, and shall be 12 cm in both longitudinal and transverse directions. To join the transverse overlap at the ends of the rolls, it is necessary to previously heat the transverse edge of the lower sheet in a strip of 12 cm, eliminating or embedding the protection aggregate in the bituminous mass and then weld the end of the following piece

Indications and Important Recommendations

  • In case of new construction and renovation, possible chemical incompatibilities with APP plastomer-modified bitumen sheets shall be taken into account.
  • In case of renovation, chemical incompatibilities with old waterproofing consisting of flexible PVC sheets, modified tar-based mastics or any other, shall be taken into account, and it may be necessary to remove them completely or to use suitable separating layers (geotextiles, mortar layer, polyethylene film, etc).
  • If it is necessary to adhere to metallic or slightly porous elements, a bituminous primer (IMPRIDAN 100) shall be applied to the entire surface to be welded beforehand.
  • On exposed self-protected roofs, occasional water retention that could lead to sediment accumulation and damage to the waterproofing membrane shall be avoided.
  • This product may form part of a waterproofing system, so all the documents referred to in the Danosa Solutions Manual must be taken into account, as well as all the regulations and legislation that must be complied with in this respect.
  • Self-protected sheets finished in light colours perform better thermally.
  • Self-protected sheets in coloured mineral or ceramic granules may have different colour shades depending on the different production batches.
  • Self-protected sheets are exposed sheets, so care must be taken when installing them.
  • NOTE: For more information on the Danosa systems in which this product is used, please see the document "Waterproofing Solutions".
  • Do not use as a top sheet on green roofs.
  • Possible incompatibility between thermal insulation and waterproofing shall be checked.
  • Special attention must be paid to the execution of the singular points, such as parapets (meetings with vertical and emergent elements), drains, expansion joints, etc.
  • Polyurethane foam shall not be sprayed directly on top of the waterproofing without the use of a suitable separating layer (geotextiles, mortar layers, polyethylene film, etc).
  • If expansion that could affect the sheet is expected, a geotextile separating layer (Danofelt PY 200) shall be used between the sheet and the extruded polystyrene insulation panels, so that each product expands independently.

Maintenance Recommendations

  • Maintenance requirements for Danosa Roofing Products The following maintenance checks must be adhered to: - A general examination on the condition of the waterproofing and surrounding roof components. - An inspection of all functional roofing elements including skylights, outlets, upstands, penetrations and any other visible roofing components. - Clean outlets, drains, gutters and remove any debris from the roof. - Periodic removal of mildew, moss, herbs or any other kind of vegetation that has been accumulation on the waterproofing. - Periodic removal of possible sediments accumulated on the deck (silt, sledges, slate granules, etc) by occasional water accumulation. - Periodic removal of debris and small objects that may have accumulated on the roof. - Ensure surrounding structural elements are sound such as eaves, flashings, slate tiles and brickwork. - Ensure that the waterproofing is in good condition and there are no blisters, damage or separation. - Review the condition of the waterproofing (adherence to upstands, condition of overlaps, visual appearance, etc) and repair the defects observed. These operations must be carried out twice a year, preferably at the beginning of spring or autumn and must be increased in case of decks or valleys with zero falls. It is also necessary to perform additional maintenance depending on the type of roof, location and proximity of roofs to areas with trees or in areas with high levels of pollution. More details on the document Maintenance and repair recommendations for flat roofs waterproofed with modified bitumen sheets

Handling, storage and preservation

  • Before moving the pallet, the condition of the shrink-wrap is checked in order to reinforce it if necessary.
  • The product must be stored in a dry place protected from rain, sun, heat and low temperatures.
  • The product will be stored in an upright position.
  • Handle with a crane with a protective net.
  • Pallets shall not be stacked on top of each other.


  • The information contained in this document and any other advice provided, are given in good faith, based on DANOSA's current knowledge and experience when products are properly stored, handled and applied, in normal situations and in accordance with the recommendations of DANOSA. The information applies only to the application (s) and the product (s) to which reference is expressly made. In case of changes in the parameters of the application, or in case of a different application, consult the DANOSA Technical Service before using the DANOSA products. The information contained herein does not exonerate the responsibility of the building agents to test the products for the application and intended use, as well as their correct application in accordance with current legal regulations. The product images used in our communications are indicative and may differ slightly in color and aesthetic appearance in relation to the final product.Orders are accepted in accordance with the terms of our current General Sales Conditions.DANOSA reserves the right to modify, without prior notice, the data reflected in this documentation.Website: www.danosa.com E-mail: info@danosa.com Telephone: +34 949 88 82 10


  • Length (cm): 800
  • Width (cm): 100
  • Colour: Light grey
  • Thickness (mm): 3.5 (SOLAPO)
  • Product code: 141354

Technical Data

Concept Value Standard
External fire behaviour Broof(t1) UNE-EN 1187
Density (kg/m³) 1428 -
Durability flexibility -5 ± 5 -
Creep durability (ºC) 100 ±10 UN-EN 1110
Elongation at break longitudinal (%) 45 ±15 UNE-EN 12311-1
Elongation at transverse break (%) 45 ±15 -
Humidity resistance factor 20.000 UNE-EN 1931
Low temperature flexibility (ºC) <-15 UNE-EN 1109
Mass per unit area (nominal) (kg/m²) 5 -
Reaction to fire E UNE-EN 11925-2; UNE-EN 13501-1
Resistance to static loading (kg) >25 UNE-EN 12730
Resistance to root penetration No pasa UNE-EN 13948
Longitudinal tensile strength (N / 5cm) 900 ± 250 -
Transverse tensile strength (N / 5cm) 650 ± 250 -
Longitudinal resistance to tearing (nail shank) (N) 300 ±100 -
Transversal resistance to tearing (nail shank) (N) 300 ±100 -
Hazardous substances PND -

Addtitional Technical Data

Concept Value Standard
Adhesion of granules (%) <30 UNE-EN 12039
Dimensional stability at elevated temperatures (longitudinal) (%) <0.3 UNE-EN 1107-1
Dimensional stability at high temperatures (transversal) (%) <0.3 -
Creep resistance at high temperatures (ºC) >100 UN-EN 1110

Environmental Information

Concept Value Standard
Recycled content afterword the consumer (%) 35 -
Manufactured in Fontanar - Guadalajara (España) -

Standards and Certification

  • In accordance with the UNE-EN 13707 standard for flexible sheets for waterproofing. Reinforced bituminous sheets for roof waterproofing. Definitions and characteristics.
  • It complies with the requirements of the Technical Building Code (CTE).
  • Complies with CE marking requirements.
  • ETE 06/0058 “Polydan Plus FM”.
Scroll to Top