{"product_id":"gruntus-deep-penetrating-primer","title":"Gruntus – Deep-Penetrating Primer","description":"\u003cp\u003e\u003cstrong\u003eGruntus\u003c\/strong\u003e is a clear, deep-penetrating primer that \u003cstrong\u003estrengthens the substrate and locks down dust\u003c\/strong\u003e, getting walls ready for Limewash paint and decorative plasters.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSoaks up to \u003cstrong\u003e5 mm\u003c\/strong\u003e into the surface, binding loose and crumbling layers together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes not cover or change the colour of the wall\u003c\/strong\u003e – it dries completely invisible.\u003c\/li\u003e\n\u003cli\u003eDiluted \u003cstrong\u003e1:1\u003c\/strong\u003e with water, so a single tin goes a long way.\u003c\/li\u003e\n\u003cli\u003eVapour-permeable – the wall can still breathe.\u003c\/li\u003e\n\u003cli\u003eFree from heavy metals and aromatic solvents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDilution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1:1 with water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14–18 m² per 1 L (once diluted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePenetration depth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eup to 5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ebrush or roller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoats\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1, or 2 on very absorbent surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 L · 4 L · 10 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy prime at all?\u003c\/h3\u003e\n\u003cp\u003eThe most common painting problem looks harmless enough: you peel off the masking tape and a thin layer of wall comes away with it. That leaves a scar you have to fill and repaint.\u003c\/p\u003e\n\u003cp\u003eIt happens when the surface is dusty or slightly powdery – which describes most walls after sanding a skim coat, over old paint and on fresh gypsum plaster. The paint ends up gripping the dust rather than the wall.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGruntus deals with the problem at its source.\u003c\/strong\u003e It penetrates the substrate, binds loose particles and creates a stable base. Afterwards the tape comes away cleanly, and every following coat bonds to the wall rather than to whatever was sitting on it.\u003c\/p\u003e\n\u003ch3\u003eHow it differs from PrepCoat\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eGruntus\u003c\/th\u003e\n\u003cth\u003ePrepCoat\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhat it is\u003c\/td\u003e\n\u003ctd\u003eclear primer\u003c\/td\u003e\n\u003ctd\u003ewhite base coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhat it does\u003c\/td\u003e\n\u003ctd\u003estrengthens the wall, binds dust\u003c\/td\u003e\n\u003ctd\u003eevens out colour and absorbency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoes it cover?\u003c\/td\u003e\n\u003ctd\u003eno\u003c\/td\u003e\n\u003ctd\u003eyes, white-pigmented\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhen you need it\u003c\/td\u003e\n\u003ctd\u003edusty, fragile or fresh walls\u003c\/td\u003e\n\u003ctd\u003ealways before Limewash paint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eOn a weak substrate you need both: \u003cstrong\u003eGruntus\u003c\/strong\u003e first to stabilise the wall, then \u003cstrong\u003ePrepCoat\u003c\/strong\u003e so the colour comes out even.\u003c\/p\u003e\n\u003cp\u003eUnder thick decorative plasters such as Marmorinus and Romanus, Gruntus on its own is usually enough. Under paint and thin finishes you need both.\u003c\/p\u003e\n\u003ch3\u003eWhere to use it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003egypsum skim coats and plasters, including fresh ones\u003c\/li\u003e\n\u003cli\u003esanded, dusty walls\u003c\/li\u003e\n\u003cli\u003eold, powdery surfaces\u003c\/li\u003e\n\u003cli\u003emineral substrates before decorative plaster\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to apply\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eClean the wall – remove dust, greasy marks and anything loose. Fill and level any defects before priming.\u003c\/li\u003e\n\u003cli\u003eDilute 1:1 with water.\u003c\/li\u003e\n\u003cli\u003eApply evenly with a brush or roller, without missing any patches.\u003c\/li\u003e\n\u003cli\u003eOn very absorbent or heavily dusty surfaces, apply a second coat.\u003c\/li\u003e\n\u003cli\u003eLeave to dry completely before applying PrepCoat or plaster.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ZUBRA COLORS","offers":[{"title":"1 L \/ 16 m²","offer_id":54253281804616,"sku":null,"price":24.9,"currency_code":"EUR","in_stock":true},{"title":"4 L \/ 64 m²","offer_id":54253281837384,"sku":null,"price":88.9,"currency_code":"EUR","in_stock":true},{"title":"10 L \/ 160 m²","offer_id":54253281870152,"sku":null,"price":209.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/9010\/9000\/files\/download.png?v=1791469431","url":"https:\/\/zubracolors.com\/products\/gruntus-deep-penetrating-primer","provider":"ZUBRA COLORS","version":"1.0","type":"link"}