Will it make a tiled wetroom floor waterproof? We suspect water is leaking through fine cracks

No it will not! Penetrating sealer reduces water ingress and makes tile & grout more water resistant NOT WATERPROOF! If you want to do that then use PSRP Grout Colourant as that is a urethane colorant and that will make the grout waterproof. However, I would also be looking to see why it cracked in the first place

hi can this be used on unpolished porcelaine

Yes no problemThe Original Penetrating SealerWATER, STAIN & SLIP PROTECTION FOR:* Sanded Grout* Quarry Tile* Ceramic Tile* Glazed Tile * Porcelain Tile* Polished Granite* Polished Marble * Stucco* Slate* Terrazzo * Quartz* Travertine* Agglomerate 511 Impregnator is the original penetrating sealer designed for the protection of all medium to dense porous surfaces. 511 Impregnator forms an invisible barrier that is resistant to moisture and stains while allowing vapor to escape. 511 Impregnator is not a surface coating and will not alter the natural look. All surfaces treated are harder and less slippery. INDEPENDENT LABORATORY TESTS SHOW 511 IMPREGNATOR OUTPERFORMS COMPETITIVE PRODUCTS. (Test results are available upon request). SPECIAL FEATURES:* Interior & Exterior Use* Less Expensive* OK for Food Areas* Superior Coverage

Going to use this on white subways tiles. Will it stain them?

I cannot imagine it would impregnate a good quality glazed tile and I did not notice that the sealant had a yellow tinge (like some varnishes do) but you could always do a test patch which is what the manufacturer would recommend. The other option is to find a UK-based manufacturer of specialist cleaners and sealers (eg Stonehealth) who supply sample pots.

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Miracle Sealants 511 Impregnator "The Original Impregnating Sealer" 946mls (US Quart)

Miracle Sealants 511 Impregnator "The Original Impregnating Sealer" 946mls (US Quart)

Product ID: 50859431

Details

Brand
Miracle
Item dimensions L x W x H
5.7 x 13.3 x
Item weight
794 g
Material
Polyurethane
Style
Compact

🌞UV transparent protection

📏Covers up to 4000 sq ft/gal

🛡️Superior water resistance

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Description

🛠️ Seal smart, live worry-free—your surfaces deserve the original!

TRUSTED BY PROS - Top-rated with 4.5 stars and a cult following among DIY and professional users alike.
INVISIBLE SHIELD - UV transparent formula keeps surfaces looking fresh without altering appearance.
LONG LASTING COVERAGE - Generous 946ml quart covers up to 4000 sq ft, making it a lifetime investment.
ULTIMATE GROUT GUARDIAN - Seals and protects grout with unmatched water repellency for a pristine finish.
VERSATILE SURFACE SAVIOR - Perfect for wood, concrete, metal, and glass—one sealer to rule them all.

Miracle Sealants 511 Impregnator is a premium, clear polyurethane sealer designed for both interior and exterior use. It offers superior water resistance and UV transparency, protecting a variety of surfaces including wood, concrete, metal, and glass. With coverage up to 4000 square feet per gallon, this trusted professional-grade sealer ensures long-lasting protection and a flawless finish, making it a must-have for anyone serious about durable surface care.

Specifications

ASIN	B000VX7HKW
Best Sellers Rank	200,572 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,172 in Sealers
Brand	Miracle Sealants
Colour	Clear
Compatible Material	Wood, Concrete, Metal, Glass
Customer Reviews	4.5 4.5 out of 5 stars (3,615)
Item Dimensions	5.7 x 13.3 x 19.1 centimetres
Item Form	Liquid
Item Weight	794 g
Manufacturer	Miracle Sealants
Manufacturer Part Number	511 QT SG
Material	Polyurethane
Model Number	511QT6
Number of Items	1
Style Name	Compact
Surface Recommendation	Floor or Countertop
UPC	753927511530
Unit Count	946.0 millilitre
Water Resistance Level	Water Resistant

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