GENERAL GUIDELINE SikaMembran® System - ses.sika.com · SikaBond® TF Plus N adhesive bead shall...

GENERAL GUIDELINE SikaMembran® System 01.09.2017 / VERSION 1 / SIKA SERVICES AG

General Guideline

SikaMembran® System Sika Services AG

01.09.2017, VERSION 1 Tueffenwies 16

Document ID_Master EN CH-8048 Zurich

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TABLE OF CONTENTS 1 PURPOSE AND GENERAL INFORMATION 3

2 INTRODUCTION 4

3 AREAS OF APPLICATION 4

4 MEMBRANE SELECTION AND DESIGN 6

5 WORKING PLACE CONDITIONS 6

6 SURFACE PRE-TREATMENTS 7

6.1 USE OF Sika® Cleaner P 8 6.2 APPLICATION OF Sika® Aktivator-205 8 6.3 APPLICATION OF Sika® Primer-210 AND Sika® Primer-3 N 8

7 PROCESSING AND PRODUCT APPLICATION 9

8 APPLICATION STEPS 10

9 APPLICATION ON BITOUMINOUS SURFACES 12

10 REPAIR OF DAMAGES 12

11 LEGAL NOTE 13

General Guideline




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1 PURPOSE AND GENERAL INFORMATION

This document contains recommendations and hints for the application of products out of the SikaMembran®

System, used to provide durable vapor barrier and waterproof seal at junctions between building elements. These

guidelines are relevant for the following products:

SikaMembran® Universal Elastic EPDM butyl modified foil

Provided with CE marking according to EN 13984:2011 - DoP 84382700.

Meet fire retardant requirements of EN 13501-1 Class E under free

suspension. Good ozone and UV resistance. Waterproofing resistant

membrane, meeting requirements of EN 13984 Type A.

SikaMembran® Strong Elastic EPDM foil

Provided with CE marking according to EN 13984:2011 - DoP 45619468




SikaMembran® Outdoor Elastic EPDM foil





SikaMembran® Outdoor Plus Elastic EPDM foil



suspension. Good ozone and UV resistance. Membrane resistant to

driving water, meeting requirements of EN 13984 Type B.

SikaMembran® ECO Uni Elastic EPDM foil – Ultra thin

Provided with CE marking according to EN 13984:2011 –

DoP 01 52 32 02 001 9 001000




SikaMembran® ECO Out Elastic EPDM foil – Ultra thin

Provided with CE marking according to EN 13984:2011 –

DoP 01 52 32 02 002 9 001000


suspension. Good ozone and UV resistance. Membrane resistant to

driving water, meeting requirements of EN 13984 Type B.

SikaBond® TF plus N 1-part polyurethane adhesive

The information herein is offered for general guidance only. Since on site conditions as well as substrates may vary

greatly, customers and applicators must test the suitability of the product on site on original substrates and contact

the Technical Department of Sika Industry for advice.

For detailed information about products and surface pre-treatment agents please refer to the most recent Product

Data Sheets (PDS) and Safety Data Sheets (SDS).

General Guideline




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Picture 1: General Health and Safety Instructions.

2 INTRODUCTION

If the air is cooled to below the dew point, the excess moisture condenses as liquid water within the structure. A

“moisture transport mechanism” of this kind where water migrates through structural members in the form of vapor

is particularly apparent in climates like that of Western and Central Europe and other similar climatic regions in the

winter months. There is more water vapor in the atmosphere in heated rooms than there is in the outside air, and

their difference in concentration is balanced by vapor diffusion from the inside to the outside. This phenomenon is

obviously reversed in tropical regions with a hot, damp climate outside but with cool, air-conditioned rooms inside.

According to many international standards, e.g. German DIN 4108 “Thermal Insulation in Buildings”, a structural

element must be designed so that an unacceptable quantity of condensed water is not produced inside the structure;

for instance when water vapor diffuses moving from inside to outside and meets a material with a very high vapor

diffusion resistance and/or a layer of thermal insulation.

SikaMembran® system comprises a versatile range of façade sheet membranes and corresponding adhesive.

SikaMembran® sheet

EPDM synthetic rubber waterproofing membrane available in different grades, which offer different optimized

levels of vapour diffusion and mechanical strength for all climatic conditions.

SikaBond® TF plus N

One-part polyurethane elastic adhesive curing on exposure to atmospheric humidity and specifically

manufactured for bonding SikaMembran® to a wide range of building substrates.

3 AREAS OF APPLICATION

SikaMembran® system can be used:

To provide flexible vapor control layer and waterproof barrier at the interface between curtain wall facade and

adjacent building parts

To connect joints in concrete and brick constructions in ventilated facades

For encapsulating insulating materials (flashing, replacing aluminum sheets)

For sealing window perimeter.

General Guideline




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Picture 2: Vapor proofing interface in movement joints of curtain walling.

Picture 3: Connection joint in concrete and brick construction behind rainsceen panels.

Picture 4: Perimeter sealing around windows.

Picture 5: Flashing of insulating materials.

SikaMembran® System






General Guideline




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4 MEMBRANE SELECTION AND DESIGN

Performance of SikaMembran® sheets may greatly vary depending on wall construction materials, component

dimensions, system orientation, climatic conditions, country, etc. As every construction wall and related

performance are unique, design details and product selection should be determined by responsible engineer and

building physicist based on specific local regulations.

Size of SikaMembran® Sheet

SikaMembran® sheet shall be applied in a width big enough to avoid any stress on the membrane due to building

movements.

Size of SikaBond® TF plus N joint

SikaBond® TF Plus N adhesive bead shall be spread on building elements to ensure a joint width of approx. 4-5 cm

and a thickness of minimum 1 mm (depending on substrate).

SikaBond® TF plus N is compatible with SikaMembran® sheets.

All other sealants and building materials such as roofing membranes have to be approved by Sika before using them

in combination with SikaBond® TF plus N or in contact with SikaMembran® sheets. Where two or more different

reactive sealants are used, allow the first to cure completely before applying the next one.

For specific information regarding compatibility between various Sika façade adhesives and sealants and

SikaMembran® sheets please contact the Technical Service Department of Sika Industry.

For more details about SikaMembran® refer to the actual Product Data Sheet (PDS) and Safety Data Sheet (SDS).

Product

Thickness

t

[ mm ]

Diffusion resistance coefficient

µ

[ - ]

Equivalent Air Layer Thickness

sd – Value

[ m ]

SikaMembran® Universal 0.6 103’000 62

SikaMembran® Strong 1.2 66’000 79

SikaMembran® Outdoor 0.6 75’000 45

SikaMembran® Outdoor Plus 0.6 5’000 3

SikaMembran® ECO Uni 0.5 80’000 40

SikaMembran® ECO Out 0.5 4’000 2

SikaBond® TF plus N 10 *) 2’500 25

*) Joint depth.

5 WORKING PLACE CONDITIONS

The working place must be as dust-free and dry as possible. All substrates and adhesives must never be exposed to

direct sun radiation, rain, snow or other direct weathering impacts.

The optimum application temperature of SikaMembran® System is between 15 °C and 25 °C. As this may be difficult

to comply with on construction site, SikaMembran® System may be processed within 5 °C to 35 °C. These limits apply

to the temperature of SikaMembran® System (EPDM foil and adhesive), the substrates as well as the ambient air.

The temperature of the components to be bonded must always be at least 3 °C higher than the dew point

temperature of the air to reduce condensation risk. The relative humidity should not exceed 75 %.

Please be aware that curing speed of SikaBond® TF plus N adhesive depends on air humidity and temperature: the

lower the air humidity and the temperature the slower the product will cure.

Service temperature of SikaMembran® System ranges from -40 °C to 90 °C.

General Guideline




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If SikaMembran® System has to be applied at temperatures outside the mentioned range, contact the

Technical Department of Sika Industry. Field adhesion tests are recommended. Temperatures at non-

cured sealant below -5 °C or above 60 °C must be avoided under all circumstances. At low temperatures,

it is recommended to use additional mechanical fixings to retain SikaMembran® foils in position until

the adhesive has fully cured (Section 8).

6 SURFACE PRE-TREATMENTS

Surfaces must be clean, dry, homogenous and free from oil, grease, dust and loose or friable particles. Cement

laitance, poorly adhering particles or incompatible paints must be removed by a rotary mechanical wire brush,

grinding or grit blasting.

Do not contaminate pre-treated surfaces during any application phase.

Do not use SikaBond® TF plus N on bituminous substrates or other oil or plasticizers bleeding substrates

e.g. natural rubber. Do no bring in contact uncured SikaBond® TF plus N with reactive isocyanate

substances, especially alcohol, which are components of spirits, many thinners, cleaners and release

agent because the curing process will be disturbed or disabled.

The information in Table 1 is offered for general guidance only. With the exception of SikaMembran® foils, onsite

adhesion tests on the original substrates are recommended prior to the adhesive application.

Table 1: Overview of pre-treatments

Substrate Surface Pre-treatment – SikaBond® TF plus N

SikaMembran® sheet No pre-treatment required if clean surface is freshly applied from roll

Anodized aluminum Sika® Cleaner P

Polyester powder-coated aluminium or PVDF-coated aluminium

Sika® Aktivator-205 *)

PVC Sika® Aktivator-205 *)

Stainless steel Sika® Aktivator-205 *)

Concrete and plaster Wire brushing or grinding **)

*) Sika® Aktivator-205 leaves a visible film on the pre-treated surfaces and can change the appearance of the pre-treated

substrates. If this is not acceptable, use masking tape to protect the visual areas.

**) After wire brushing or grinding, clean by brush or vacuum the porous substrate to ensure it is dust-free and no friable parts

are left. On concrete and plaster works, priming is normally not required. On moist substrates, use Sika® Primer-210 or Sika®

Primer-3 N after wire brushing or grinding.

For porous substrates, use of Sika® Aktivator-205 is not recommended.

For porous substrates exposed to frequent water contact use Sika® Primer-3 N or Sika® Primer-210.

General Guideline




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6.1 USE OF Sika® Cleaner P

Sika® Cleaner P is a solvent-based cleaning agent. For greasy or oily surfaces use Sika® Cleaner G+M which has a

better oil/grease removal capability than Sika® Cleaner P.

Use of Sika® Cleaner P:

1. Moisten a clean, dry, oil-free and lint-free paper towel with Sika® Cleaner P and wipe the surface with it. Use

fresh paper towel regularly in order to retain the cleansing power and to avoid wiping residues back onto the

surface.

2. Then wipe-off the solvent with a clean, dry, oil-free and lint-free paper towel. Wipe off the solvent before it dries.

Never wait until Sika® Cleaner P has evaporated from the surface because dissolved contaminants would

remain behind.

3. Repeat this procedure until the surface is clean.

4. The required minimum drying time at 5 °C – 35 °C is 2 minutes on non-absorbing substrates.

5. If cleaned parts cannot be bonded immediately, protect them against subsequent contamination.

6. If more than two hours have passed since cleaning, always repeat the cleaning process before bonding.

For more details about Sika® Cleaner P refer to the actual Product Data Sheets (PDS) and Safety Data Sheets (SDS).

6.2 APPLICATION OF Sika® Aktivator-205

Sika® Aktivator-205 is an activating agent to pre-treat surfaces to improve adhesion and should always be applied

on clean substrates.

Sika® Aktivator-205 is not a simple cleaning solvent but contains a bonding agent which forms an

activating film on the substrate surface. On some surfaces, for example on certain glossy powder-coated

aluminum profiles, this film may be visible and change the appearance of the profile. Therefore it is

important to apply Sika® Aktivator-205 like a primer and to use masking tapes in critical (visual) areas if

necessary.

1. Moisten a clean, dry, oil-free and lint-free paper towel with Sika® Aktivator-205 and apply it on the surface. Use

fresh paper towel regularly in order to avoid wiping any residues back onto the surface.

2. The surface treated with Sika® Aktivator-205 must not be dried subsequently with a paper towel.

3. The required minimum drying times are as follows (depending on temperature):

5 – 10 °C: 10 minutes

10 – 15 °C: 5 minutes

> 15 °C: 2 minutes

In case of doubt, contact the Technical Department of Sika Industry.

4. If pretreated parts are not sealed immediately, protect them against subsequent contamination.

Adhesives should be applied within 2 hours after the application of Sika® Aktivator-205. Otherwise the procedure

as described above has to be repeated before bonding. Pre-treating procedure can be repeated once only.

For more details about Sika® Aktivator-205 refer to the actual Product Data Sheet (PDS) and Safety Data Sheet (SDS).

Tightly re-seal container with the inner plastic liner immediately after each use. Sika® Aktivator-205 shall

only be used within one month after opening the can. Discard any Sika® Aktivator-205 that has become

opaque instead of transparent, has gelled or separated.

6.3 APPLICATION OF Sika® Primer-210 AND Sika® Primer-3 N

On porous substrates, Sika® Primer-210 and Sika® Primer-3 N shall always be applied after the surfaces have been

properly cleaned and are dust-free.

General Guideline




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1. Ideal application and surface temperature is between 15 °C and 25 °C.

2. Surfaces must be clean, dry and free from grease, oil, dust and loose particles.

3. Apply a thin but covering coat of Sika® Primer-210 / Sika® Primer-3 N with a felt, clean lint-free cloth or foam

applicator. Make sure that this single application gives adequately dense coverage. It shall be applied once only.

4. Let the primer drying for a minimum time of 30 minutes. Once the primer has been applied, it is essential that

no more solvents get onto the surface and that there is no contamination.

5. If pre-treated parts are not bonded /sealed immediately, protect them against subsequent contamination.

Adhesive should be applied within 2 hours after the application of Sika® Primer-210 / Sika® Primer-3 N.

Apply Sika® Primer-210 / Sika® Primer-3 N once only. Priming process must not be repeated!

Tightly re-seal container immediately after each use. Sika® Primer-210 / Sika® Primer-3 N shall only be

used within one month after opening the can. Discard any primer that has gelled or separated.

For more details about Sika® Primer-210 and Sika® Primer-3 N refer to the actual Product Data Sheets (PDS) and

Safety Data Sheets (SDS).

7 PROCESSING AND PRODUCT APPLICATION

SikaBond® TF plus N is applied manually directly from unipacks by hand-, pneumatic- or electric driven piston guns.

The adhesive must be applied evenly and free of air bubbles. The 1-component product forms a skin after a certain

time (skin-time, skin over-time), which varies with ambient temperature and humidity; substrates must be joined

together not later than half of the skin time.

Protect substrates and finished joint from water until adhesive has fully cured.

Clean all tools and application equipment with Sika® Remover-208 immediately after use.

Hardened / cured material can only be removed mechanically.

Theoretical consumption of SikaBond® TF plus N per 600 ml unipack 8mm bead (without wastage) is approx. 6÷7

linear meter dependent on substrate profile.

For more details about SikaMembran® System and SikaBond® TF plus N refer to the actual Product Data Sheets (PDS)

and Safety Data Sheets (SDS).

General Guideline




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8 APPLICATION STEPS

1.

After substrates have been properly cleaned and

pre-treated, insert SikaBond® TF plus N unipack

into adequate sealant gun and cut the nozzle to a

diameter ≥ 8mm.

Firmly extrude the adhesive bead.

2.

Spread out the adhesive bead by using a clean

spatula to approx. 4 – 5 cm width and 1 mm

thickness (depending on substrate).

3.

Fix SikaMembran® sheet tension-free and in a way

that movement of the connected building parts

can be accommodated by the membrane without

damaging it.

In case foil overlapping is required, the min

overlapping length is 5 cm.

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4.

Press SikaMembran® sheet on the adhesive using

a plastic roller. The membrane must be fully

bonded over a width of 4 cm. Ensure an overlap at

the end joints of approx. 5 cm.

5.

Embed the edges of SikaMembran® sheet in the

excess adhesive using a spatula to ensure water

tightness.

6.

The membrane may be readjusted within a time of

30 minutes after fixing.

Bonding at low temperature or high wind load as well as large membrane strips can require additional

holding or supports during adhesive curing time. In order to ensure tightness of the system, any

mechanical fixation trough the membrane foil (nails, pins, anchors, etc.) must be applied in

correspondence of the adhesive bead within half of the skin time.

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9 APPLICATION ON BITOUMINOUS SURFACES

For connections to bituminous surfaces we recommend following procedure:

Fix a layer of Sika® Multiseal on the clean and dry bitumen as a barrier. Different versions of SikaMultiseal® tape

exist: use the tape version which includes a coated aluminum flashing. To improve adhesion to bitoumen, use a

heat gun for the Sika® Multiseal application.

Pretreat the aluminum flashing of Sika® Multiseal tape by Sika® Aktivator-205.

Bond SikaMembran® sheet on the aluminum flashing of the Sika® Multiseal tape using SikaBond® TF plus N as

described in Section 8.

Avoid any contact between SikaMembran® sheet and bitouminous surface.

For more details about Sika® Multiseal and its application refer to the actual Product Data Sheets (PDS) and Safety

Data Sheets (SDS).

Picture 6: SikaMembran® system on bituminous surfaces.

10 REPAIR OF DAMAGES

SikaMembran® sheets are very robust against mechanical damage. In case of a cut or pin whole apply a patch big

enough to cover 5 cm on each side of the damage. Spread the adhesive on the membrane and attach the repair

patch firmly on it. Embed the edge of the repair membrane in the excess of the adhesive.

SikaMembran® sheet

SikaBond® TF plus N

Sika® Aktivator-205

Sika® Multiseal Tape

(version including a

coated aluminum flashing)

Bitouminous roofing membrane

Concrete

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11 LEGAL NOTE

The information contained herein and any other advice are given in good faith based on Sika's current knowledge

and experience of the products when properly stored, handled and applied under normal conditions in accordance

with Sika's recommendations. The information only applies to the application(s) and product(s) expressly referred

to herein and is based on laboratory tests which do not replace practical tests. In case of changes in the

parameters of the application, such as changes in substrates etc., or in case of a different application, consult

Sika's Technical Service prior to using Sika products. The information contained herein does not relieve the user

of the products from testing them for the intended application and purpose. All orders are accepted subject to

our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data

Sheet for the product concerned, copies of which will be supplied on request.

Version given by

Sika Services AG

Phone: +41 58 436 40 40

Mail : [email protected]

© 2017 Sika Services AG

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