Sika® Primer-157 – Two-component primer for asphalt & mastic asphalt Sika® Primer-157 (formerly MSeal P 157) is a high-quality, two-component primer on a polysulphide-epoxy resin basis. It was developed specifically for adhesion promotion for the polysulphide sealants Sikaflex® CR 170 and CR 171 on asphalt and mastic asphalt. Thanks to its film-forming properties, it also offers a sealing protective film. Product advantages: Film-forming and sealing – for reliable protection of the joint flanks Very good adhesion to asphalt and mastic asphalt Optimal penetration behaviour for permanently resilient bonds Compatible with Sikaflex® CR 170 and CR 171 Areas of application: Bonding agent for asphalt surfaces in road and civil engineering Joint pre-treatment on mastic asphalt for bridges, parking decks or industrial areas Technical properties: Product type: two-component polysulphide-epoxy resin primer Colour: transparent Packaging: 1 litre combination pack Flash-off time: approx. 4 hours at 20 °C (tack-free), overwork after 8 hours at the latest Application temperature: 15–25 °C (component & substrate temperature) Substrate preparation: The joint flanks must be load-bearing, clean, dry and free of oils, greases, loose components, paints and separating substances. The surface is wet-cut or ground with diamond tools to achieve a finely grippy texture. Before application, the substrate must be thoroughly cleaned (vacuumed/blown off) and completely dried. Mixing & application: Stir component A thoroughly. Add component B completely and mix homogeneously with a stirrer at approx. 300 rpm for at least 2 minutes. Apply with a roller or brush to prepared substrates – no puddle formation! Before jointing, the primer must be cured tack-free. Cleaning: Cured primer can only be removed mechanically. Clean hands with cleaning wipes or water & industrial hand cleaner – do not use solvents on the skin. Certifications & approvals: Tested with Sikaflex® CR 170 and CR 171 on mastic asphalt DIBt approvals: Z-74.6-166 (Sikaflex® CR 170) / Z-74.6-168 (Sikaflex® CR 171)

Sika® Primer-107 – Silane-based one-component primer for non-absorbent substrates Sika® Primer-107 (formerly MSeal P 107) is a high-quality, one-component bonding agent on a silane basis, developed specifically for use on non-absorbent substrates such as stainless steel, non-ferrous metals and polymer concrete. It optimises the adhesion of the Sikaflex® CR 170 and CR 171 joint sealants and ensures a permanent, secure bond indoors and outdoors. Product advantages: Very good adhesion capability on stainless steel, non-ferrous metals and polymer-bound concrete substitute (PRM/PRC) Low viscosity – for easy, quick application One-component – ready for immediate use without mixing Transparent – discreet application Typical areas of application: Adhesion promotion on non-absorbent substrates such as alloyed steel (e.g. stainless steel) Application on polymer concrete (UP resin) or glazed ceramics Usable indoors and outdoors Technical properties: Material temperature: +5 °C to +40 °C Substrate & air temperature: +5 °C to +40 °C Dew point: component temperature at least 3 °C above the dew point Flash-off time: at least 10 minutes at 23 °C / 50% RH Can be overworked with sealant: 10 to a maximum of 30 minutes Packaging & colour: Container: 1 litre (packaging unit: 4 pieces/box) Colour: transparent Certifications & approvals: Tested in the system with Sikaflex® CR 170 / CR 171 General building-authority approvals: Z-74.6-166 (CR 170) & Z-74.6-168 (CR 171) Usable as a system component in Sikalastic® 7801 AS per Z-59.31-428