Sealing of wall-through hole for formwork tie passage, in concrete wall, with elastic sealant

Sealing of wall-through hole of between 20 and 25 mm internal diameter for formwork tie passage, in concrete wall, with closed-cell expanded polyethylene cord, circular section of 20 mm diameter, for joint backing; single-component elastomeric sealant based on polyurethane, grey colour, applied with gun from joint backing outwards; and subsequent coating with single-component thixotropic mortar, polymer-modified, reinforced with fast-setting fibres (45 minutes), with a compressive strength at 28 days greater than or equal to 25 N/mm² and abrasion resistance according to Böhme method UNE-EN 13892-3 of 13.6 cm³ / 50 cm², class R2 according to UNE-EN 1504-3, Euroclass F reaction to fire, according to UNE-EN 13501-1, Euroclass F reaction to fire, according to UNE-EN 13501-1.