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Sarnafil® TS 77-20

Polymeric membrane for mechanically fastened roof waterproofing

Sarnafil® TS 77-20 (thickness 2.0 mm) is a polyester reinforced, multi-layer, synthetic roof waterproofing sheet based on premium-quality flexible polyolefins (FPO) containing ultraviolet light stabilizers, flame retardant and an inlay of glass non-woven according to EN 13956.
Sarnafil® TS 77-20 is a hot air weldable roof membrane formulated for direct exposure and designed to use in all global climatic conditions. Sarnafil® TS 77-20 is produced with an inlay of glass non-woven for dimensional stability and a polyester reinforcement for high strength. Sarnafil® TS 77-20 is provided for mechanically attached roof systems.
Sarnafil® TS 77-20 has no built-in stress at the time of production and has a fully encapsulated carrier. The dimensional stability of Sarnafil® TS 77-20 is best in class. Suitable for use in hot and tropical climatic conditions.

  • Proven performance over decades.
  • Various colours available.
  • High reflectance properties for excellent cool roofing characteristics (relevant only for colour RAL 9016 SR).
  • Resistant to permanent UV exposure.
  • High dimensional stability due to glass fleece inlay.
  • Resistant to permanent wind exposure.
  • Resistant against impact load and hail.
  • Resistant to all common environmental influences.
  • Resistant to micro-organisms.
  • Resistant to root penetration.
  • Compatible to old bitumen.
  • Hot air welding without use of open flames.
  • Recyable.
Sarnafil® TS 77-20
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Usage

Waterproofing membrane for:
  • Mechanically fastened roofing systems.
  • Enhancement of solar reflection of existing TPO roofs (relevant only for colour RAL 9016 SR).
 

Advantages

  • Proven performance over decades.
  • Various colours available.
  • High reflectance properties for excellent cool roofing characteristics (relevant only for colour RAL 9016 SR).
  • Resistant to permanent UV exposure.
  • High dimensional stability due to glass fleece inlay.
  • Resistant to permanent wind exposure.
  • Resistant against impact load and hail.
  • Resistant to all common environmental influences.
  • Resistant to micro-organisms.
  • Resistant to root penetration.
  • Compatible to old bitumen.
  • Hot air welding without use of open flames.
  • Recyable.

Packaging

Sarnafil® TS 77-20 standard rolls are wrapped individually in a blue PE-foil.

Packing unitSee price list
Roll length

15.00 m

Roll width2.00 m
Roll weight66.00 kg

Colour

Surface

Standard

Matt

Solar reflectiveGlossy

Colours

Top surface

Beige
Window grey (nearest RAL 7040)
Anthracite (neareast RAL 7016)
Copper brown (nearest RAL 8004)
Reseda green (nearest RAL 6011)
Traffic white (nearest RAL 9016)
Traffic white, solar reflective (RAL 9016 SR)

Bottom surface

Black

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sarnafil® TS 77-20 is designed and manufactured to meet the most international recognised standards.

  •  Polymeric sheets for roof waterproofing according to EN 13956, certified by notified body 1213-CPD-3915 and provided with the CE marking.
  • Reaction to fire according to EN 13501-1.
  • External fire performance tested according to ENV 1187 and classified according to EN 13501-5: BROOF (t1).
  • Factory Mutual (FM) Approvals Class: 4470.
  • Official Quality Approvals and Agreement Certificates.
  • Monitoring and assessment by approved laboratories.

 

Product Information

Shelf life

5 years from date of production in unopened, undamaged and original
packaging.

Storage conditions

Rolls must be stored between +5 °C and +30 °C in a horizontal position on pallet, protected from direct sunlight, rain and snow. Do not stack pallets of rolls or any other material during transport or storage.

Product Declaration

EN 13956

Visible Defects

Pass

(EN 1850-2)

Length

15 m (-0 % / +5 %)

(EN 1848-2)

Width

2 m (-0.5 % / +1 %)

(EN 1848-2)

Effective Thickness

2.0 mm (-5 % / +10 %)

(EN 1849-2)

Straightness

≤ 30 mm

(EN 1848-2)

Flatness

≤ 10 mm

(EN 1848-2)

Mass per unit area

2.2 kg/m² (-5 % / +10 %)

(EN 1849-2)
System information

System Structure

Wide range of accessories is available example prefabricated parts, roof drains, scuppers and walkway pads.
The following accessories shall be used:

  • Sarnafil® T 66-15 D Sheet for detailing
  • Sarnafil® TS 77 strips
  • Sarnafil® T Metal Sheet
  • Sarnabar® / Sarnafast®
  • Sarnafil® T Welding Cord
  • Sarnafil® T Prep
  • Sarnacol® T 660
  • Sarnafil® T Clean

Compatibility

Sarnafil® TS 77-20 may be installed on all thermal insulations and levelling layers suitable for roofing. No additional separation layer is required.

Sarnafil® TS 77-20 is suitable for installation directly on top of existing, carefully cleaned, levelled bituminous roofing, example re-roofing over old flat roofs.

Colour changes in membrane surface may occur in case of direct contact with bitumen.
Technical Information

Resistance to Impact

Hard substrate

≥  1250 mm

Soft substrate

≥ 1500 mm

Hail Resistance

Rigid substrate

≥  30 m/s

Flexible substrate

≥ 40 m/s

Resistance to Static Load

Soft substrate

≥  20 kg

Rigid substrate

≥ 20 kg

Tensile Strength

Longitudinal (md)1)

≥ 1000 N/50mm

Transversal (cmd)2)

≥ 900 N/50mm

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

Elongation

Longitudinal (md)1)

≥  13 %

Transversal (cmd)2)

≥ 13 %

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

Dimensional Stability

Longitudinal (md)1)

≤ 0.2 %

Transversal (cmd)2)

≤ 0.1 %

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

No failure in seam

(EN 12316-2)

Joint Shear Resistance

≥  500 N/50 mm

(EN 12317-2)

Foldability at Low Temperature

≤  -40 °C

(EN 495-5)

External Fire Performance

BROOF(t1) < 20°

(EN 1187)

(EN 13501-5)

Reaction to Fire

Class E

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

Effect of Liquid Chemicals, Including Water

On request

(EN 1847)

Exposure to Bitumen

Pass3)

(EN 1548)

Resistance to UV Exposure

Pass (> 5 000 h / grade 0)

(EN 1297)

Watertightness

Pass

(EN 1928)

Solar Reflectance Index

Colour

Initial

3 years aged

Test Institute

RAL 9016 SR

111

-

Intertek

RAL 9016

107

-

Intertek

Beige79-Intertek
RAL 704031-Sika

CRRC tested products, listed in Cool Roof Rating Council (CRRC) product data base.

USGBC LEED Rating

Colour

Initial

3 years aged

RAL 9016-SR

SRI > 82

SRI > 64

RAL 9016

SRI > 82

SRI > 64

Conform on the minimum requirements of LEED V4 SS credit 5 option 1 Heat Island reduction - Roof.

Application

Application Information

Ambient Air Temperature

-20 °C min. / +60 °C max.

Substrate Temperature

-30 °C min. / +60 °C max.
Application steps

SUBSTRATE QUALITY

The substrate surface must be uniform, 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 Solvent T 660 before adhesive is applied.

APPLICATION

Installation works to be carried out only by Sika instructed contractors for roofing.

Installation of some ancillary products, example contact adhesives / cleaners is limited to temperatures above +5 °C. Please observe information given by Product Data Sheets.

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