{"product_id":"bostik-cempolay-deep-floor-levelling-compound-grey-20kg","title":"Bostik Cempolay Deep Floor Levelling Compound Grey 20kg","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eBostik Cempolay Deep Floor Levelling Compound in a 20kg bag. This high-strength, protein-free, cement-based levelling compound is designed for deep internal applications. It levels and smooths uneven subfloors, capable of building up from 5mm to 50mm in a single pour. \u003cbr\u003e\u003cbr\u003eThe formulation combines selected cements and organic binders to produce a robust, free-flowing mortar that transforms irregular subfloors into a flat, load-bearing surface ready for a wide range of floor coverings. \u003cbr\u003e\u003cbr\u003eOnce mixed with water, the compound develops a smooth, easily workable consistency with excellent flow and rapid hardening characteristics. \u003cbr\u003e\u003cbr\u003eIts protein-free composition reduces the risk of bacterial growth, making it suitable for hygiene-sensitive areas in healthcare or food preparation environments.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide application thickness\u003c\/strong\u003e: Levels from 5mm to 50mm in a single application, ideal for significant height corrections and deep filling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh strength and durability\u003c\/strong\u003e: Creates a dense, load-bearing surface suitable for light to heavy-duty interior traffic prior to floor covering installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtein-free formulation\u003c\/strong\u003e: Prevents biological contamination, ensuring suitability in hospitals, kitchens, and other hygiene-critical areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent workability\u003c\/strong\u003e: Free-flowing mortar with a 15-20 minute working time for easy application and self-levelling performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid setting\u003c\/strong\u003e: Accepts light foot traffic after approximately 90 minutes, expediting project turnaround.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile substrate compatibility\u003c\/strong\u003e: Bonds to concrete, sand\/cement screeds, stone, and properly prepared unglazed tiles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderfloor heating compatibility\u003c\/strong\u003e: Suitable for use over warm-water underfloor heating systems when installed to correct specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth finish\u003c\/strong\u003e: Provides a high-quality, even surface for vinyl, carpet, tile, and other bonded coverings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBag size - 20 kg\u003c\/strong\u003e: Supplied in 20kg units to achieve consistent water-to-powder ratio and reliable site handling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLevelling uneven subfloors\u003c\/strong\u003e: Corrects irregularities and undulations in concrete or screeded floors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaising floor levels\u003c\/strong\u003e: Builds up internal floors to significant heights in one operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilling depressions and trenches\u003c\/strong\u003e: Ideal for filling low spots, voids, or service channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCreating sloping screeds\u003c\/strong\u003e: Forms controlled gradients for drainage or transitions between floor levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmoothing over existing hard surfaces\u003c\/strong\u003e: Suitable for use over well-bonded, sound subfloors such as concrete, sand\/cement screeds, stone, or unglazed ceramic and quarry tiles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e: Use over wooden floors, adhesive residues, mastic asphalt, or areas subject to permanent water immersion.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate preparation\u003c\/strong\u003e: Surfaces must be clean, dry, structurally sound, and free of grease, dust, laitance, or contaminants. Mechanical preparation such as grinding or shot blasting may be required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepair and inspection\u003c\/strong\u003e: Fill cracks and voids with a suitable repair mortar such as Bostik Rapid Repair Mortar and allow to dry before application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental conditions\u003c\/strong\u003e: Maintain substrate, air, and material temperature between +5°C and +27°C; avoid draughts during curing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing ratio\u003c\/strong\u003e: Add exactly 3.5 litres of clean, cold water per 20 kg bag. Gradually add powder to water while mixing with a heavy-duty drill (minimum 650 rpm) fitted with a mixing paddle. Mix for at least two minutes, allow to stand for one minute, then briefly re-mix.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication process\u003c\/strong\u003e: Pour immediately after mixing, spreading evenly with a steel trowel or gauge rake to the desired thickness. Use a spiked roller within 10–15 minutes to de-aerate and achieve a uniform finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking time\u003c\/strong\u003e: Approximately 15–20 minutes at +20°C. Do not add water to re-temper the mix once it begins to stiffen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrying and curing\u003c\/strong\u003e: Protect the surface until set. Allow full drying before applying coverings — typically 24 hours per 5 mm thickness at +20°C.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial composition\u003c\/strong\u003e: Cement and polymer binder blend with fine aggregates; free from protein and casein.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication depth\u003c\/strong\u003e: Suitable for single-pour thicknesses between 5 mm and 50 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive strength\u003c\/strong\u003e: High early and final strength for domestic, commercial, and light-industrial interiors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking time and trafficability\u003c\/strong\u003e: Approximately 15–20 minutes working time; accepts light foot traffic after 90 minutes at +20°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrying time before coverings\u003c\/strong\u003e: 4 hours for loose-laid coverings; approximately 24 hours per 5 mm thickness for bonded finishes such as vinyl or wood.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface moisture\u003c\/strong\u003e: Ensure substrate \u0026lt;75%RH before installation of impervious finishes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Suitable for use over concrete, screed, stone, and other rigid mineral subfloors; not for exterior or submerged applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance\u003c\/strong\u003e: Subfloor preparation and installation in accordance with BS 8204 (Code of Practice for Concrete Subfloors).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Always follow the manufacturer’s data sheet and safety guidance. Use appropriate PPE during mixing and application, and ensure adequate ventilation throughout the curing process.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Bostik","offers":[{"title":"Default Title","offer_id":53771510546543,"sku":"6003081","price":31.27,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/Bostik_Deep_Self_Levelling_-_Photo.jpg?v=1783758534","url":"https:\/\/supplyyard.co.uk\/products\/bostik-cempolay-deep-floor-levelling-compound-grey-20kg","provider":"Supply Yard","version":"1.0","type":"link"}