{"product_id":"natcem-dw-25kg","title":"Natcem DW 25kg","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNatcem DW is an environmentally friendly, fast-setting waterproof mortar with rapid strength gain, suitable for installation from a minimum of 10mm to any thickness. Formulated from a blend of natural cement binder, retarder and specially selected graded aggregates passing a 2mm sieve, it requires only the addition of water — no primers or curing agents needed. Sets in 40–60 minutes at 20°C and achieves an impressive 56 MPa compressive strength and 7.5 MPa flexural strength at 28 days. Suitable for use underwater and down to 7°C. DWI Regulation 31 approved (ref: 56\/4\/1049) and tested to BS 6920 for effect on water quality. Can be overcoated within one hour of setting. Supplied in 25kg bags.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFast setting — commences at 40 minutes, complete at 60 minutes at 20°C\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eHigh compressive strength — 56 MPa at 28 days, with strength continuing to develop thereafter\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eWaterproof with very low shrinkage and high chemical resistance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSulphate resistant and resistant to chloride penetration\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSets underwater and usable down to 7°C\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eDWI Regulation 31 approved for contact with potable water (ref: 56\/4\/1049)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eTested to BS 6920: Effect on Water Quality\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eNo primers, bonding agents or curing agents required — just add water\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCan be overcoated, covered or painted within one hour of setting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMix ratio: 1 x 25kg bag with 3.6–4 litres of water produces approximately 12.5 litres of mortar\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCoverage: approximately 1m² at 10mm depth per 25kg bag\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMinimum application thickness: 10mm\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eDo not apply additional water during finishing — may cause surface cracking\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eOnce setting has started, do not remix or smooth the surface\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eDo not use on frozen or overheated substrates (outside 0°C–30°C range)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eShelf life: minimum 12 months in dry storage conditions\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAlways refer to the Natcem DW Product Data Sheet before use\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Natural Cement","offers":[{"title":"Default Title","offer_id":57432912757068,"sku":"BM06256","price":39.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/natural-cement-mortar-natcem-dw-25kg-1235060687.jpg?v=1777657631","url":"https:\/\/www.constructionsuppliesuk.co.uk\/products\/natcem-dw-25kg","provider":"Construction Supplies UK","version":"1.0","type":"link"}