Product Data Sheet Show all documents

Sarnacol®-2142 S

Adhesive for Sarnafil® felt backed roof waterproofing membranes

Sarnacol®-2142 S is a 1-part, polyurethane based moisture curing adhesive.

  • Proven performance over decades
  • Adheres to solid, rough, clean, dry or slightly moist surfaces
  • Application by roller
  • Good adhesion to different substrates
Product Data Sheet Show all documents

Usage

Bonding Sarnafil® G Felt-type and Sarnafil® T Felt-type membranes to roof substrates. Bonding substrates
  • Concrete, lightweight concrete, plaster
  • Oriented fibre strand boards, plywood panels
  • Fibre cement boards
  • Slated/mineralized bitumen sheets; new and aged
  • Mineral fibre boards: product specific approval with sufficient compressive strength and appropriate surface for bonding
  • PUR/PIR insulation boards with lamination (glass, mineral fibre fleece or aluminium facing) product specific approval (e.g. Kingspan TR 26/27)
  • EPS insulation boards: Slap stock foaming cut, compressive strength ≥ 100 kPa
  • Steel panels: product specific approval (e.g. Brucha Panels WP)
  • Metal sheet (e.g galvanized)
 

Advantages

  • Proven performance over decades
  • Adheres to solid, rough, clean, dry or slightly moist surfaces
  • Application by roller
  • Good adhesion to different substrates

Packaging

One way container

5 kg, 15 kg

Packing unit

Euro pallet or single container

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Factory Mutual (FM) Certificate
Product Information

Chemical base

Polyurethane moisture curing

Shelf life

9 months from date of production

Storage conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Density

~1.00 kg/L (+20 °C)

Consistency

Liquid

Volatile organic compound (VOC) content

VOC-CH

18.8 %

VOC-EU

18.8 %
System information

Compatibility

Incompatible substrates:

  • Single ply waterproofing membranes without a felt backing
  • Talcum coated bituminous sheets

Application

Application Information

Ambient air temperature

+5 °C min.

Substrate temperature

+5 °C min.
Consumption

Consumption

Consumption depends on the roughness and absorbency of the substrate.

Recommended consumption of Sarnacol®-2142 S on different substrates (+20 °C / 50 % r.h. )

Substrate

1st Coat
g/m2

2nd Coat
g/m2

Mineral-fibre board: Standard board smooth surface

Not suitable

Not suitable

Mineral-fibre board: Flumroc “Mega” rough surface

800

400

Mineral-fibre board: Bondrock MV

400

-

Bituminous sheet: New: Slated/mineral surface

450

-

Bituminous sheet: Aged: Slated/mineral surface

400

-

PUR/PIR: Type Kingspan TR 27 with glass tissue facing Kingspan TR 26 aluminium

400

-

Timber: OSB 3

350

-

EPS: Slab stock foaming cut: e.g. ISOBOUW

250

-

These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.
Application steps

SUBSTRATE QUALITY

The substrate must offer sufficient strength and adhesion to resist the forces generated by wind suction.

SUBSTRATE PREPARATION

The substrate must be firm, clean, dry or slightly moist, free from oil, grease, dust, stripping agents, standing water, bitumen residue and loose friable particles.

APPLICATION

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

General information

Sarnacol®-2142 S must be stirred carefully before use. Keep adhesive container closed whenever adhesive is not being used to prevent surface skinning.

To improve the workability of the adhesive at low temperatures, the closed container can be placed in warm water (max. +40 °C).

Adhesive residue on Sarnafil® G Felt must be cleaned with Sarna Cleaner.
Adhesive residue on Sarnafil® T Felt, must be cleaned with Sarnafil® T Clean.

General bonding procedure - Wet bonding
The adhesive is spread evenly onto the substrate by using a synthetic application roller directly from the container and ensuring there are no lumps in the applied layers.

Bonding to PVC Membranes

Apply adhesive onto the substrate. Do not apply the adhesive to an area greater than can be covered within 15 minutes. Do not pour out the adhesive and roll in a second stage. Once the adhesive surface has become 'tacky', apply the membrane onto the adhesive. Press down firmly on the membrane using a suitable pressure roller such as a water-filled, or heavy steel roller 40 – 50 kg.

 

Bonding to EPS insulation board
Apply adhesive onto the substrate in a thin layer (~250 g/m2).

Bonding to very absorbent substrates (Mineral fibre boards)
Apply 2 coats of adhesive. The first coat ~800 g/m2. Allow the adhesive to dry completely. Apply a second coat ~400 g/m2 max.

CLEANING OF TOOLS

Clean all tools and application equipment with Sarna Cleaner or Sarnafil® T immediately after use. Hardened material can only be mechanically removed.

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