Product Data Sheet Show all documents
Sarnafil® AT-18 FSA P

Sarnafil® AT-18 FSA P

POLYMERIC SELF-ADHERED DETAILING SHEET FOR SARNAFIL® AT ROOF WATERPROOFING MEMBRANES

Sarnafil® AT-18 FSA P is a reinforced multi-layer, self-adhesive, synthetic roof waterproofing sheet based on flexible polyolefins (FPO). Sarnafil® AT-18 FSA P is a hot air weldable, UV-resistant  roof detailing membrane for upstands.

  • Fast installation of membrane
  • Resistant to permanent UV exposure
  • Resistant to most common environmental influences
  • High dimensional stability due to glass fleece inlay
  • Resistant against impact load and hail
  • Resistant to micro organisms
  • Resistant to old bitumen
  • Hot air welding without use of open flame
 
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Product Data Sheet Show all documents

Usage

Self-adhered membrane for the exposed application on roofing upstands:
  • Hot air welded to the installed Sarnafil® T / Sarnafil® AT roof waterproofing membranes
 

Advantages

  • Fast installation of membrane
  • Resistant to permanent UV exposure
  • Resistant to most common environmental influences
  • High dimensional stability due to glass fleece inlay
  • Resistant against impact load and hail
  • Resistant to micro organisms
  • Resistant to old bitumen
  • Hot air welding without use of open flame
 

Packaging

Standard rolls are wrapped individually in blue PE-foil.

Packing unit

Refer to price list

Roll length

15,00 m

Roll width

0,33 m, 0,50 m, 0,66 m (includes one welding overlap of 0,15 m)

1,00 m (includes two welding overlaps of 0,15 m - left and right side)

Roll weight

0,33 m

11,4 kg

0,50 m 

17,3 kg

0,66 m

22,8 kg

1,00 m34,5 kg

Refer to current price list for packaging variations

Colour

Surface

matt

Colour

~RAL 7040 (window grey) ~RAL 7012 (basalt grey)

Bottom surfaceblack

Product Details

Product Information

Chemical Base

Flexible polyolefins (FPO) 

Shelf Life

18 months from date of production.

Storage Conditions

Product must be stored in original unopened and undamaged packaging in dry conditions and temperatures between +5 °C and +30 °C. 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.

Visible Defects

Pass

(EN 1850-2)

Length

15,00 m (-0 % / +5 %)

(EN 1848-2)

Width

0,34 m, 0,5 m, 0,66 m, 1,0 m (-0,5 % / +1 %)

(EN 1848-2)

Effective Thickness

1,8 mm (-5 % / +10 %)

(EN 1849-2)

Mass per unit area

2,3 kg/m2 (-5 % / +10 %)

(EN 1849-2)
System information

System Structure

The following products must be considered for use depending on roof design:

  • Sarnafil® T Metal Sheet
  • Sarnabar®
  • Sarnafil® T Welding Cord
  • Sarnafil® T Prep / Sarnafil® T Wet Task Set
  • Sarnafil® T Clean

Substrate

Primer

Sikatherm PIR GT

None
OSB 3/PlywoodPrimer 600/610 

Concrete

Primer 600/610

Sikatherm Mineral wool Primer 600/610

Metal composite panel

None
Metal (Aluminium, galvanized steel)None
Bitumen sanded/slatedPrimer 600/610

Wide range of accessories is available e.g. prefabricated parts, roof drains, scuppers, walkway pads and decor profiles.
Technical Information

Flexibility at low temperature

≤  -50 °C(EN 495-5)

Water Tightness

Pass(EN 1928)
 

Exposure to Bitumen

Pass1)(EN 1548)

1) Sarnafil® AT is compatible with 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)

Reaction to Fire

Class E(EN ISO 11925-2, classification to EN 13501-1)

Application

Application Information

Ambient Air Temperature

+5 °C min. / +60 °C max.

Substrate Temperature

+5 °C min. / +60 °C max.
Application steps

EQUIPMENT

Hot welding overlap seams
Electric hot air welding equipment, such as hand held manual hot air welding equipment and pressure rollers or automatic hot air welding machines with controlled hot air temperature capability of a minimum +600 °C.
Recommended type of equipment:
Manual: Leister Triac
Automatic : Sarnamatic 661/681
Semi-automatic: Leister Triac Drive

SUBSTRATE QUALITY

The supporting structure must be of sufficient structural strength to apply all new and existing layers of the roof build-up. The complete roof system must be designed and secured against wind uplift loadings.

The substrate can be one of the materials mentioned in the System Structure.

The substrate must be uniform, firm, smooth and free of any sharp protrusions or burrs, etc. The supporting layer must be compatible to the membrane, solvent resistant, clean, dry and free of grease and dust. Metal sheets must be degreased with Sarnafil® Cleaner before adhesive is applied.

APPLICATION

Installation procedure
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

Substrate priming
Prime prepared substrate with appropriate primer.

Fixing Method
Sarnafil® AT-18 FSA P must be fully bonded to substrate. Blisters and wrinkles must be avoided.

Hot welding method
Overlap seams must be welded by electric hot welding equipment. Welding parameters including temperature, machine speed, air flow, pressure and machine settings must be evaluated, adapted and checked on site according to the type of equipment and the climatic conditions prior to welding. The effective width of welded overlaps by hot air must be a minimum 20 mm.

Testing overlap seams
The seams must be mechanically tested with screwdriver (rounded edges)  to ensure the integrity/completion of the weld. Any imperfections must be rectified by hot air welding.

 

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