Product Data Sheet Show all documents

Sikaplan® SGK-18

Polymeric membrane for adhered roof waterproofing

Sikaplan® SGK-18 is a multi-layer, synthetic roof waterproofing sheet based on premium-quality polyvinyl chloride (PVC) with inlay of glass non-woven and polyester fleece backing according to EN 13956.

  • Resistant to permanent UV irradiation
  • High dimensional stability due to glass fleece inlay
  • Resistant against impact load and hail
  • High water vapour permeability
  • Resistant to all common environmental influences
  • Compatible to old bitumen due to felt backing
  • Hot air welding without use of open flames
  • Recyclable
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Product Data Sheet Show all documents

Usage

Roof waterproofing membrane for exposed flat roofs, adhered by using Sika-Trocal® C-300 adhesive.      Approved Substrates:
  • Slated/mineralized bitumen sheets; new and aged
  • EPS: compressive strength ≥ 100 kPa (10 %), Density >20 kg/m3
  • OSB, plywood, fibre cement boards
  • Mineral fibre boards (e.g. Bondrock MV)
  • PUR/PIR insulation boards, (e.g. Sarnatherm PIR GT, Kingspan TR 27)
  • Concrete, lightweight concrete
  • Metal
 

Advantages

  • Resistant to permanent UV irradiation
  • High dimensional stability due to glass fleece inlay
  • Resistant against impact load and hail
  • High water vapour permeability
  • Resistant to all common environmental influences
  • Compatible to old bitumen due to felt backing
  • Hot air welding without use of open flames
  • Recyclable

Packaging

Packing unit:

see price list

Roll length:

12.50 m

Roll width:

2.00 m

Roll weight:62.50 kg

Colour

Surface:

slightly structured

Colours:

Top surface:

light grey (nearest RAL 7047)

Bottom surface:

lead grey (nearest RAL 7012)

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Polymeric sheets for roof waterproofing according to EN 13956, certified by notified body 1213-CPD-4125 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) and BROOF(t3).
  • Official Quality Approvals and Agrement Certificates and approvals.
  • Monitoring and assessment by approved laboratories.
  • Quality Management system in accordance with EN ISO 9001/14001.
  • Production according to Responsible Care policy of Chemical Industry.
Product Information

Product Declaration

EN 13956

Shelf Life

5 years from date of production in unopened, undamaged and original packaging.Product does not expire during correct storage.

 

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.

Visible Defects

Pass

(EN 1850-2)

Length

12.50 m (-0 % / +5 %)

(EN 1848-2)

Width

2.00 m (-0.5 % / +1 %)

(EN 1848-2)

Effective Thickness

1.8 mm (-5 % / +10 %)

(EN 1849-2)

Straightness

≤  30 mm

(EN 1848-2)

Flatness

≤  10 mm

(EN 1848-2)

Mass per unit area

2.5 kg/m2  (-5 % / +10 %)

(EN 1849-2)
System information

System Structure

The following accessories shall be used:

  • Sikaplan® D-18 or Sikaplan® S-15 unreinforced sheet for detailing.
  • Sikaplan® G-15 or Sikaplan® SG-15 roofing sheet for stripes.
  • Moulded corner pieces, prefabricated corners and pipe flashings
  • Sika-Trocal® Metal Sheet Type S
  • Sarnabar for peel stop
  • Sika-Trocal® Cleaner-2000
  • Sika-Trocal® Cleaner L-100
  • Sika-Trocal® Welding Agent
  • Sika-Trocal® Seam Sealant
  • Sika-Trocal® C-300 (One-component PU adhesive for surface bonding)
  • Sika-Trocal® C-733 (Contact adhesive)

Compatibility

The PVC compound is not compatible with direct contact to other plastics, e.g. EPS, XPS, PUR, PIR or PF.

The PVC compound is not resistant to tar, bitumen, oil and solvent containing materials.

Compatibility to bitumen or plastic surfaces below the membrane is achieved by incorporated Polyester fleece backing.
Technical Information

Resistance to Impact

hard substrate

≥     800 mm

soft substrate

≥   1500 mm

Hail Resistance

rigid substrate

≥  25 m/s

flexible substrate

≥  32 m/s

Tensile Strength

longitudinal (md)1)

≥  600 N/50 mm

transversal (cmd)2)

≥  600 N/50 mm

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

Elongation

longitudinal (md)1)

≥  50 %

transversal (cmd)2)

≥  50 %

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

Tear Strength

longitudinal (md)1)

≥  150 N

transversal (cmd)2)

≥  150 N

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

Joint Peel Resistance

≥  300 N/50 mm

(EN 12316-2)

Joint Shear Resistance

≥  500 N/50 mm

(EN 12317-2)

Dimensional Stability

longitudinal (md)1)

≤  |0.3| %

transversal (cmd)2)

≤  |0.3| %

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

Foldability at Low Temperature

≤  -25°C

(EN 495-5)

Water Tightness

Pass

(EN 1928)

Effect of Liquid Chemicals, Including Water

On request

(EN 1847)

UV Exposure

Pass (> 5 000 h / grade 0)

(EN 1297)

External Fire Performance

BROOF(t1)<20°,  < 20°, BROOF(t3)  <10° / <70°

(EN 13501-5)

Reaction to Fire

Class E

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

Application

Application Information

Ambient Air Temperature

-15 °C min. / +60 °C max. for hot air welding
+5 °C min. / +60 °C max. for cold welding

Substrate Temperature

-25 °C min. / +60 °C max. for hot air welding
+5 °C min. / +60 °C max. for cold welding
Application steps

SUBSTRATE QUALITY

The substrate surface must be uniform, smooth and free of any sharp protrusions or burrs, etc.
In case of adhesion by Sika-Trocal® C-300, all layers of the built-up and substrate must be secured against wind uplift.
The Polyester fleece laminated to Sikaplan® SGK-18 underside separates sufficiently from any incompatible substrate. It prevents from direct contact to bitumen or plastic material, e.g. expanded polystyrene (EPS), extruded polystyrene (XPS), polyurethane (PUR), polyisocyanurate (PIR) or phenolic foam (PF) for compatibility in the built-up.

 

APPLICATION

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

Installation of some ancillary products, e.g. contact adhesives/thinners is limited to temperatures above +5 °C. Please refer to the respective Product Data Sheets.
Special measures may be compulsory for installation below +5 °C ambient temperature due to safety requirements in accordance with national regulations.

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