{"product_id":"sikadur-31-cf-normal-2-part-epoxy-structural-adhesive-repair-mortar","title":"Sikadur-31 CF Normal 2-Part Epoxy Structural Adhesive \u0026 Repair Mortar","description":"\u003cp\u003eSikadur-31 CF Normal 2-Part Epoxy Structural Adhesive \u0026amp; Repair Mortar\u003c\/p\u003e\u003cp\u003eA moisture-tolerant, thixotropic structural adhesive and repair mortar based on two-component epoxy resin and special fillers. Designed for application between +10°C and +30°C, it combines strong adhesion with a non-sag consistency for professional bonding and repairs.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEasy to mix and apply, with no primer needed on correctly prepared substrates.\u003c\/li\u003e\n\u003cli\u003eVery good adhesion to many construction materials.\u003c\/li\u003e\n\u003cli\u003eHigh initial and ultimate mechanical strength.\u003c\/li\u003e\n\u003cli\u003eThixotropic consistency for vertical and overhead applications; tested vertical non-sag thickness up to 15mm.\u003c\/li\u003e\n\u003cli\u003eHardens without shrinkage.\u003c\/li\u003e\n\u003cli\u003eWhite and dark-grey components provide visual mixing control.\u003c\/li\u003e\n\u003cli\u003eGood abrasion and chemical resistance.\u003c\/li\u003e\n\u003cli\u003eImpermeable to liquids and water vapour.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: Sika\u003c\/li\u003e\n\u003cli\u003eModel: Sikadur-31 CF Normal\u003c\/li\u003e\n\u003cli\u003eComposition: Two-component epoxy resin with special fillers\u003c\/li\u003e\n\u003cli\u003eMixing ratio A:B: 2:1 by weight or volume\u003c\/li\u003e\n\u003cli\u003eComponent A: White; component B: Dark grey; mixed colour: Concrete grey\u003c\/li\u003e\n\u003cli\u003eManufacturer-listed mixed density: 1.90 +0.1 kg\/L at +23°C, evacuated\u003c\/li\u003e\n\u003cli\u003eMaximum layer thickness: 30mm\u003c\/li\u003e\n\u003cli\u003eVertical non-sag thickness: Up to 15mm, EN 1799\u003c\/li\u003e\n\u003cli\u003eShelf life: 24 months from production\u003c\/li\u003e\n\u003cli\u003eStorage: Original unopened, sealed and undamaged packaging in dry conditions between +5°C and +30°C, protected from direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eFor experienced professionals only. Suitable as a structural adhesive and mortar for concrete elements, hard natural stone, ceramics, fibre cement, mortar, bricks, masonry, steel, iron, aluminium, wood, polyester, epoxy and glass.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRepairing corners and edges.\u003c\/li\u003e\n\u003cli\u003eFilling holes and voids.\u003c\/li\u003e\n\u003cli\u003eVertical and overhead repairs.\u003c\/li\u003e\n\u003cli\u003eJoint filling, crack sealing and joint or crack-edge repair.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003eCheck substrate strength. Concrete and mortar should generally be older than 28 days, subject to the required minimum strength.\u003c\/li\u003e\n\u003cli\u003ePrepare a sound, clean, open-textured surface free from laitance, dirt, oil, grease, old coatings and loose material. Substrates must be dry or mat damp with no standing water. Prepare steel by suitable blast cleaning to a quality similar to Sa 2.5, then vacuum clean.\u003c\/li\u003e\n\u003cli\u003eKeep the material, air and substrate between +10°C and +30°C. The substrate must remain at least 3°C above the dew point.\u003c\/li\u003e\n\u003cli\u003eMix components A and B in the specified 2:1 ratio for at least 3 minutes using a slow-speed drill and mixing spindle at no more than 300 rpm, until smooth and uniformly grey. Avoid introducing air.\u003c\/li\u003e\n\u003cli\u003eTransfer the mixture into a clean container and mix for approximately 1 further minute at low speed.\u003c\/li\u003e\n\u003cli\u003eBrush the adhesive well into the substrate. Keep layers within the 30mm maximum and the 15mm vertical non-sag limit. Follow the project specification for bonding, support and loading.\u003c\/li\u003e\n\u003cli\u003eMix only what can be used within the pot life. Do not mix the next unit until the previous unit has been used.\u003c\/li\u003e\n\u003cli\u003eClean tools immediately with Sika Colma Cleaner. Hardened material requires mechanical removal.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eA two-component Sikadur-31 CF Normal unit containing parts A and B. Sika lists pre-batched 1.2kg and 6kg units; the pack size supplied by this single-option listing is not identified. Confirm the supplied unit size before ordering. Tools and cleaner are not listed as included.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eTechnical Information\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eConsumption: Approximately 1.9 kg\/m² per millimetre of thickness.\u003c\/li\u003e\n\u003cli\u003ePot life for a 200g mix: approximately 145 minutes at +10°C, 55 minutes at +23°C and 35 minutes at +30°C. Open time at +30°C: approximately 50 minutes.\u003c\/li\u003e\n\u003cli\u003ePot life starts when resin and hardener are mixed. Higher temperatures and larger batches shorten working time. Dividing the mixed material into portions can extend workability; components may be cooled before mixing but not below +5°C.\u003c\/li\u003e\n\u003cli\u003eCompressive strength at +10\/+23\/+30°C: approximately 30\/50\/55 N\/mm² after 1 day; 45\/60\/65 N\/mm² after 3 days; 55\/65\/65 N\/mm² after 7 days.\u003c\/li\u003e\n\u003cli\u003eCompressive elastic modulus: approximately 4,600 N\/mm² after 14 days at +23°C, ASTM D695.\u003c\/li\u003e\n\u003cli\u003eFlexural strength at +10\/+23\/+30°C: approximately 14\/25\/25 N\/mm² after 1 day; 25\/30\/30 N\/mm² after 2 days; 30\/35\/35 N\/mm² after 7 days.\u003c\/li\u003e\n\u003cli\u003eTensile strength at +10\/+23\/+30°C: approximately 4\/8\/12 N\/mm² after 1 day; 12\/20\/20 N\/mm² after 3 days; 17\/21\/22 N\/mm² after 7 days.\u003c\/li\u003e\n\u003cli\u003eAdhesion to dry or moist concrete after 1 day at +10°C: greater than 4 N\/mm² with 100% concrete failure.\u003c\/li\u003e\n\u003cli\u003eAdhesion to steel: approximately 8 N\/mm² after 1 day at +10°C; after 3 days, approximately 12 N\/mm² at +10°C, 13 N\/mm² at +23°C and 15 N\/mm² at +30°C.\u003c\/li\u003e\n\u003cli\u003eThermal expansion coefficient: 5.9 × 10⁻⁵ per °C over +23°C to +60°C, EN 1770.\u003c\/li\u003e\n\u003cli\u003eHeat deflection temperature: +49°C after 7 days curing at +23°C, at 10mm thickness. This is a test result, not a general service-temperature rating.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eCertificates\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eSika lists testing to EN 1504-4 for structural bonding adhesive and CE marking.\u003c\/p\u003e","brand":"Sika","offers":[{"title":"Default Title","offer_id":42517363851349,"sku":"Sikadur-31-CF-Normal","price":15.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/5987\/3365\/files\/Sikadur-31_CF_Normal.jpg?v=1786957028","url":"https:\/\/esemall.com\/products\/sikadur-31-cf-normal-2-part-epoxy-structural-adhesive-repair-mortar","provider":"ESE Mall Construction Hub","version":"1.0","type":"link"}