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Sika Sarnafil AT-25, Flexible Polyolefin Membrane for Mechanically Fastened and Ballasted Roof Waterproofing, Exterior, Window Grey, 2 M X 10 M

Sika Sarnafil AT-25, Flexible Polyolefin Membrane for Mechanically Fastened and Ballasted Roof Waterproofing, Exterior, Window Grey, 2 M X 10 M

Waterproofing
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 2 m x 10 m
Width mm
Length 10000.0 m
Weight 52.0 Kg
Usage Waterproofing membrane for:Mechanically fastened roofing systemsLoose laid ballasted roofs with different ballast materials (e.g. gravel, concrete slabs)Green roofs (intensive, extensive)Utility roofsInverted roofsTerraces with pedestrian traffic
Chemical Base Flexible polyolefins (FPO)
Usage Area Exterior
Color Window grey (~RAL 7040)
Storage Conditions Product must be stored in original unopened and undamaged packaging in dry conditions and temperatures between +5 °C and +30 °C. Store in a horizontal position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging
Density 2,60 kg/m² (-5 % / +10 %)
Consumption N/A

Polymeric FPO membrane for mechanically fastened and ballasted roof waterproofing

Sarnafil® AT-25 (thickness 2,5 mm) is a multi-layer synthetic membrane based on flexible polyolefines (FPO) with an internal fabric and backing according to EN 13956. Sarnafil® AT-25 is a hot air weldable roof membrane formulated for direct exposure and designed for use in all global climatic conditions.

  • Resistant to UV exposure
  • Resistant to permanent wind exposure
  • Resistant to all common environmental influences
  • Hot air weldable
  • No open flame equipment required
  • High dimensional stability from glass fleece inlay
  • Resistant against impact load and hail
  • Resistant to mechanical influences
  • Resistant to root penetration
  • Compatible with old bitumen
Usage
Waterproofing membrane for:
  • Mechanically fastened roofing systems
  • Loose laid ballasted roofs with different ballast materials (e.g. gravel, concrete slabs)
  • Green roofs (intensive, extensive)
  • Utility roofs
  • Inverted roofs
  • Terraces with pedestrian traffic
Advantages
  • Resistant to UV exposure
  • Resistant to permanent wind exposure
  • Resistant to all common environmental influences
  • Hot air weldable
  • No open flame equipment required
  • High dimensional stability from glass fleece inlay
  • Resistant against impact load and hail
  • Resistant to mechanical influences
  • Resistant to root penetration
  • Compatible with old bitumen
 
Packaging

Sarnafil® AT-25 standard rolls are wrapped individually in a blue PE-foil.

Packing unitRefer to price list
Roll length10,00 m
Roll width2,00 m
Roll weight52,00 kg

Refer to current price list for packaging variations.
Colour
Surface

matt

Colours

Top surface

window grey (~RAL 7040)

Bottom surfacedark grey
Technical Information
Resistance to Impact

hard substrate

≥ 4000 mm

soft substrate

≥ 4000 mm

Hail Resistance

rigid substrate

≥ 34 m/s

flexible substrate

≥ 46 m/s

Resistance to Static Load

soft substrate

≥ 20 kg

rigid substrate

≥ 20 kg

Resistance to Root Penetration

Pass

(EN 13948)

Tensile Strength

longitudinal (md)1)≥  950 N/50 mm
transversal (cmd)2)≥  900 N/50 mm

1) md = machine direction
2) cmd = cross machine direction

 

Elongation

longitudinal (md)1)≥ 18 %
transversal (cmd)2)

≥ 18 %

1) md = machine direction
2) cmd = cross machine direction

Tear Strength

longitudinal (md)1)≥ 300 N
transversal (cmd)2)

≥ 300 N

1) md = machine direction
2) cmd = cross machine direction

Joint Peel Resistance

failure mode: C, no failure of the joint

(EN 12316-2)

Joint Shear Resistance

≥ 400 N/50 mm

(EN 12317-2)

Dimensional Stability

longitudinal (md)1)≤ |0,4| %
transversal (cmd)2)

≤ |0,2| %

1) md = machine direction
2) cmd = cross machine direction

Foldability at Low Temperature

≤ -50 °C

(EN 495-5)

Water Tightness

Pass

(EN 1928)

Exposure to Bitumen

Pass

(EN 1548)

3) Sarnafil® AT is compatible to old bitumen

Effect of Liquid Chemicals, Including Water

Resistant to many chemicals.

Contact Sika Technical Services for additional information.

(EN 1847)

UV Exposure

Pass (> 5000 h / grade 0)

(EN 1297)

External Fire Performance

BROOF (t4) < 20° (subject to system)

(EN 13501-5)

Reaction to Fire

Class E

(EN ISO 11925-2, classification to EN 13501-1)
Application Information
Ambient Air Temperature

-20 °C min. / +60 °C max.
Substrate Temperature

-30 °C min. / +60 °C max.