Can this product used on new porcelain sinks?

Not sure. For best answer I would contact customer support at Miracle Sealants, 1-800-350-1901. I used product on honed granite and it worked very well.

How to recoat over existing 511

If all that's on there is 511, I've never noticed any problem putting more on later.

Is this product better for marble tile floor than the Impregnator Sealer? Would this be worthwhile as a third coat or wouldnt work?

Honestly they would both work. I'm not sure what you mean by third coat. You wouldn't want to apply this over a different product that creates the hard later over the surface. It should be used with other impregnating sealers. ***I'm not a pro, just an informed user

How long does the Sealer last?

It depends on what you are sealing, the amount of exposure to traffic, and if the product is installed inside or outside. I use the product on marble floors, inside near doorway to the outside I reseal every 4 years, outside I reseal every other year, inside I have not resealed in 10 years.

511 Porous Plus Penetrating Sealer Resists Stains Professional Durable Grade

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Description

🛡️ Seal the deal with invisible, professional-grade protection!

UV TRANSPARENT FORMULA - Protects without yellowing or discoloration, preserving original aesthetics.
PROFESSIONAL GRADE COVERAGE - Covers up to 4,000 sq ft per gallon on polished surfaces—ideal for large projects.
SLIP RESISTANT SAFETY BOOST - Hardens surfaces while reducing slipperiness for safer, durable floors.
ULTIMATE POROUS SURFACE DEFENSE - Penetrates deeply to shield sanded grout, stone, and tile without altering natural look.
UNMATCHED WATER STAIN RESISTANCE - Keeps your surfaces pristine with superior moisture and stain protection.

511 Porous Plus Penetrating Sealer is a professional-grade, water-based liquid designed to protect porous surfaces like stone, tile, and grout. It forms an invisible, breathable barrier that resists water, stains, and slips without altering the natural appearance. With coverage up to 4,000 sq ft per gallon on polished surfaces and proven superior performance in independent tests, it’s the go-to sealer for durable, long-lasting surface protection.

Specifications

ASIN	B00CD7NKBY
Best Sellers Rank	#265,467 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #762 in Hardware Sealers
Brand	Miracle Sealants
Brand Name	Miracle Sealants
Color	Clear
Compatible Material	Porous Materials (E.g. Tile, Stone, Grout)
Customer Reviews	4.5 out of 5 stars 122 Reviews
Item Dimensions	15 x 12 x 9 inches
Item Form	Liquid
Item Weight	6.8 Pounds
Item dimensions L x W x H	15 x 12 x 9 inches
Manufacturer	Miracle Sealants
Material	Water
Material Type	Water
Model	511PORPLS
Number of Items	1
Part Number	1873
Style	Protection
Style Name	Protection
Surface Recommendation	Tile
UPC	818508013022
Unit Count	128 Fluid Ounces
Water Resistance Level	Water Resistant

Reviews

R**.

15.08.2018

R**Y

5.03.2025

A**X

25.02.2018

C**Y

10.10.2024

D**E

16.04.2018

C**N

3.06.2024

M**.

28.06.2016

G**.

2.06.2023

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$535.25

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Excellent communication throughout the order process. Product is perfect.