Sarnacol®-2162

Polyurethane moisture curing

12 months from date of production.

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.

~1.08 kg/l (+20 °C)

Liquid

Polymer single ply waterproofing membranes (thermoplastics/elastomers).

+5 °C min

+5 °C min

These times can be affected by air humidity, temperature, adhesive thickness and substrate moisture content.

Field zones: ~200 g/m² – 400 g/m² up to 1000 g/m² on very absorbent substrates.

Perimeter zones (roof edge and corners): consumption must be increased by 50 % to 300 g/m² respectively 600 g/m².

Consumption depends on the roughness and absorbency of the substrate.

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

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

The substrate must be firm, clean, dry or slightly moist, free from oil, grease, dust, stripping agents, standing water and loose friable particles. Use Primer-600 to improve the adhesion on critical substrates. (e.g. sanded/slated bitumen). Sheet metal must be cleaned with Sarna Cleaner before adhesive is applied.

Reference must be made to further documentation where applicable, such as relevant method statement, application manual and installation or working instructions.

General Information

Sarnacol®-2162 must be shaken vigorously 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. +50 °C).

Bonding insulation boards (wet bonding)
Remove the lid from the tin and pull out the pouring spout. In central zones apply 4 continuous beads of adhesive per metre in parallel straight lines with a liquid bead width of 10–20 mm (200–400 g/m²). In perimeter zones apply 6 continuous beads of adhesive per metre with a liquid bead width of 10–20 mm (300–600 g/m²). Do not apply the adhesive to an area greater than can be covered in 5 minutes. The insulation boards or vapour control layer must be laid and pressed into the adhesive beads before surface skinning of the adhesive.
When bonding insulation boards it is recommended that periodic checks are carried out to check that the adhesive beads have been squeezed flat. Lift the insulation material at the leading edge to confirm. This is especially important on very uneven substrates.

Bonding bituminous vapour control layers (wet bonding)
Consult Sika before using Sarnacol®-2162 to bond bituminous vapour control layers as wind uplift calculations must be carried out to ascertain the suitability of the adhesive. When bonding bituminous vapour control layers to either plywood or concrete substrates, the beads of adhesive must be spread with a clean spatula to avoid over-foaming and laid within 5 minutes after application.

Bonding on roof slopes >10°
Where roofs have a slope >10°, the insulation boards or bituminous vapour control layers must be secured mechanically to prevent slipping until the Sarnacol®-2162 has set.

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