Product Data Sheet Show all documents

Sarnafil® G 410-20 L Felt

Polymeric membrane for adhered roof waterproofing

Sarnafil® G 410-20 L Felt (thickness 2.0 mm) is a multi-layer, synthetic roof waterproofing sheet based on polyvinyl chloride (PVC) with a glass non-woven inlay and polyester fleece backing. It contains ultraviolet light stabilisers according to EN 13956 / GB 12952. Sarnafil® G 410-20 L Felt is a hot-air weldable roof membrane, formulated for direct exposure and designed for use in all global climatic conditions.

Proven performance over decades
Lacquer coated surface
Resistant to permanent UV exposure
Fast installation with Sarnacol® adhesives
High dimensional stability from glass fleece inlay
High water vapour permeability
Resistant to all common environmental influences
Hot-air weldable
No open flame equipment required

Product Data Sheet Show all documents

Usage

Sarnafil® G 410-20 L Felt may only be used by experienced professionals. Waterproofing membrane for:

Fully bonded, exposed roofs

Advantages

Proven performance over decades
Lacquer coated surface
Resistant to permanent UV exposure
Fast installation with Sarnacol® adhesives
High dimensional stability from glass fleece inlay
High water vapour permeability
Resistant to all common environmental influences
Hot-air weldable
No open flame equipment required

Packaging

Standard rolls are wrapped individually in a blue PE-foil.

Roll size
Length	15.00 m
Width	2.00 m
Weight	84.00 kg

Refer to current price list for packaging variations.

Colour

Surface	matt
Colours
Top Surface	light grey
Bottom surface	dark grey

Top surface colour available in other colours subject to minimum order quantities.

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

Conformity with LEED v4 MRc 3 (Option 2): Building Product Disclosure and Optimization - Sourcing of Raw Materials
Conformity with LEED v4 MRc 4 (Option 2): Building Product Disclosure and Optimization - Material Ingredients

APPROVALS / STANDARDS

CE Marking and Declaration of Performance to EN 13956 - Polymeric sheets for roof waterproofing
GB 12952, Sarnafil® G 410-20 L Felt, Test report No. RS19-21

Product Information

Product Declaration

EN 13956 - Polymeric sheets for roof waterproofing

GB 12952 - Type GL

Chemical Base

Polyvinyl Chloride (PVC)

Shelf Life

5 years 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. 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.

Visible Defects

Pass	(EN 1850-2)

Length

15.00 m (-0 / +5 %)

(EN 1848-2)

Width

2.00 m (-0.5 / +1 %)

(EN 1848-2)

Effective Thickness

2.0 mm (-5 / +10 %)

(EN 1849-2)

Overall Thickness

2.0 mm (-5 / +10 %)

(GB 12952)

Straightness

≤ 30 mm

(EN 1848-2)

Flatness

≤ 10 mm

(EN 1848-2)

Mass per Unit Area

2.75 kg/m² (-5 / +10 %)

(EN 1849-2)

System information

System Structure

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

Sarnafil® G 410-20 L sheet for detailing
Sarnafil® Metal Sheet PVC
Sarnabar®
Sarnacol® 2170 / 2142 / 2152 Adhesive
Sarna Cleaner

Ancillary Products:

Prefabricated parts, roof drains, scuppers, walkway pads, decor profiles, protection sheets.

Compatibility

Not compatible in direct contact with bitumen, tar, fat, oil, solvent containing materials and other plastic materials, e.g. expanded polystyrene (EPS), extruded polystyrene (XPS), polyurethane (PUR), polyisocyanurate (PIR) or phenolic foam (PF). These materials could adversely affect the product properties, but can be isolated to permit system build-up.

Must be isolated from contact with building wrap systems (including building wraps with self-adhesive backings) and flashing tapes. Refer to Sika for detailing advice.

Technical Information

Resistance to Impact

hard substrate	≥ 800 mm
soft substrate	≥ 1500 mm

watertight

(GB/T20624.2)

Hail Resistance

rigid substrate	≥ 17 m/s
flexible substrate	≥ 25 m/s

Resistance to Static Load

soft substrate	≥ 20 kg
rigid substrate	≥ 20 kg

watertight

(GB/T328.25)

Tensile Strength

longitudinal (md)¹⁾	≥ 650 N/50 mm
transversal (cmd)²⁾	≥ 650 N/50 mm

≥ 120 N/cm

(GB/T328.9)

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

Elongation

longitudinal (md)¹⁾	≥ 45 %
transversal (cmd)²⁾	≥ 45 %

≥ 100 %

(GB/T328.9)

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

Tear Strength

≥ 220 N

(GB/T328.19)

Joint Peel Resistance

Failure mode: C, no failure of the joint

(EN 12316-2)

≥ 3 N/mm

(GB/T328.21)

Joint Shear Resistance

≥ 600 N/50 mm

(EN 12317-2)

Dimensional Stability

longitudinal (md)1)	≤ \|0.2\| %
transversal (cmd)2)	≤ \|0.2\| %

≤ 0.1%

(GB/T328.13)

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

Solar Reflectance

0.80	(GJB 2502.2)

Solar Reflectance Index

106 (white, initial)

(ASTM E 1980)

Foldability at Low Temperature

≤ -25 °C

(EN 495-5)

no crack

(GB/T328.15)

Water Absorption

wet weight	≤ 4 %
dry weight	≥ -0.4 %

Water Tightness

Pass

(EN 1928)

Watertight

(GB/T328.10)

Effect of Liquid Chemicals Including Water

Tensile strength retention	≥ 85 %
Elongation retention	≥ 80 %
Low temperature bend	no crack

Resistance to UV Exposure

Pass (> 5000 h / grade 0)

(EN 1297)

Retention of Properties after Heat Ageing

Tensile strength retention	≥ 85 %
Elongation retention	≥ 80 %
Low temperature bend	no crack

Artificial Ageing

Tensile strength retention	≥ 85 %
Elongation retention	≥ 80 %
Low temperature bend	no crack

Reaction to Fire

Class E

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

E	(GB 8624 / EN 13501-1)

Application

Application Information

Ambient Air Temperature

-20 °C min. / +60 °C max.

Substrate Temperature

-30 °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
Semi-automatic: Leister Triac Drive
Automatic: Leister Varimat V2

SUBSTRATE QUALITY

The substrate surface must be uniform, smooth and free of any sharp protrusions or burrs, etc. Sarnafil® G 410-20 L Felt must be separated from any incompatible substrates / materials by an effective separation layer to prevent accelerated ageing. The supporting layer must be compatible with the membrane, solvent resistant, clean, dry and free of grease and dust. Metal sheets must be degreased with Sarna 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.

Fully bonded roof surfaces and detailing

The roof waterproofing membrane is bonded to the substrate using a Sarnacol® adhesive. The type of adhesive is selected based on the type and slope of substrate. Refer to the individual Sarnacol® adhesive Product Data Sheet.

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.

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