The best stone sealers, compared.
Top pick: Everbuild 402 Water Seal, 5 litre – Highest score, 92: 5 litres agrees with 5 kg, about £13.80, 4.4 from 5,495 reviews, with UK texts on brick beading. One patio review reports slip. Best value: Raincheck Eco water seal, 5 litre – Lower shelf price among the other products scored 80 or above: about £18.00, score 81, 5.3 kg against a 5 litre title, 4.4 from 2,467 reviews. The unit-count field says 5.0 ml. Updated October 2026.
A stone sealer is a liquid for porous masonry. You use it so rain beads on a sound UK wall, or so a spill sits on a stone hearth. Beading on brick, render or pebbledash is a different job from stain resistance on a fireplace, and neither job fills a cracked bird bath. You recognise a suitable pack by the sheet. It names your surface. The volume agrees with the weight. If the wall must still dry, choose an impregnator that lines the pore rather than a film that can trap moisture. Coverage, a minimum temperature, and refusals for rain, paint, timber and ponds belong on that sheet. Fix gutters, open joints and wide cracks first. A colourless treatment on old absorbent brick is only reasonable once salts and inward drying have been considered. Listed facades and pre-1919 solid walls need advice first. Porcelain paving is usually dense. How those jobs differ is set out in the [stone sealer buying guide](/hub/garden-supplies/stone-sealer/sub/stone-sealer-buying-guide).
A stone sealer is a liquid for porous masonry. You use it so rain beads on a sound UK wall, or so a spill sits on a stone hearth.
26 products checked · 64 hrs invested · +22,800 readers
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Personal buying guide
Question 1 of 2
What is the job?
Everbuild 402 is the large can whose 5 litre claim matches a 5 kg weight, at £13.80, with 4.4 from 5,495 amazon.co.uk reviews. UK texts mostly describe rain beading on external brick once the coat has dried. Reviewers call the liquid runny, and several say the second coat is awkward to time. One patio review reports gloss, footprints and slip on old slabs. Two reviews describe asbestos-cement roofs, which the listing does not name. Painted render darkened in one text. Coverage on the maker sheet is 5 to 8 m² per litre, not a patio merchant rate.
Pros
Cons
Best for: You want a confirmed 5 litre water repellent for porous brick you can reach safely.
Less suitable: You need a wiped stain sealer, a bird-bath repair, or a can the listing allows on paint or timber.
Specifications
Common questions
Is the Everbuild can actually 5 litres?
The title, the 5,000 ml unit count and the 5 kg weight agree. The shelf price in the file is £13.80.
What surfaces does the listing name?
Brick, stone, plaster and concrete. Wall, floor and roof are the surface field. One UK review says painted render darkened.
Do the UK reviews mention slip?
One patio review reports gloss, footprints and slip on old slabs. Most wall reviews describe clear beading.
Raincheck Eco is the UK-made can at £18.00, 4.4 from 2,467 reviews. The 5.3 kg weight supports the 5 litre title. A unit-count line of 5.0 millilitre does not. UK reviews describe beading on exterior brick. The compatible-material field also names porcelain.
Pros
Cons
Best for: You want a UK-made breathable brick sealer and you can ignore a bad millilitre field.
Less suitable: You need a confirmed 5 litre-plus-sprayer kit, or a sealer for porcelain.
Specifications
Common questions
Is this a 5 millilitre bottle?
No. The title says 5 litres and the weight is 5.3 kg. The unit-count field says 5.0 millilitre, which disagrees with both.
Does the listing say it is breathable?
Yes. The title says breathable, and the bullets describe a barrier that lets the wall breathe.
How did UK reviewers apply it?
Most used a pump sprayer, two coats. They mention windows and eye protection because it blows about.
HG product 32 is the 1 litre stain impregnator at £25.43, 4.4 from 245 reviews. UK texts are hearths, slate and marble, not house walls. The bullets say silicone-free, breathable and matt, with surplus wiped at 10 minutes. The form field says spray. One buyer returned it for a granite worktop.
Pros
Cons
Best for: You want a wiped impregnator for a porous stone hearth or floor, and you will test granite first.
Less suitable: You want a 5 litre flood coat for a house wall.
Specifications
Common questions
Is HG product 32 a spray?
The form field says spray. The how-to says a paint roller, and a dry cloth if any product remains after 10 minutes.
Will it change the stone colour?
The bullets say a matt finish that enhances natural colours without altering the character. One UK patio review says it brings colour back.
Did anyone return it?
Yes. One UK review says it was not suitable for granite kitchen worktops and was returned. Granite is named in the title.
Raincheck Universal is listed at £42.99 as a 5 litre can plus a sprayer, 4.4 from 212 reviews. The file weighs 362 g and lists 310 ml, so the fill is not confirmed. Reviews talk about the sprayer more than the liquid. One pump was missing and one leaked. One wood review looked more weathered than protected.
Pros
Cons
Best for: You already know from the seller what is in the carton. This file does not prove a 5 litre fill.
Less suitable: You want a can whose weight matches the litres on the title. Use the Eco listing for that.
Specifications
Common questions
Does the file prove there are 5 litres in the box?
No. The title says 5 litres and a sprayer. The weight is 362 g and the unit count is 310 ml.
Did the sprayer arrive working?
Not always. One UK review says the pump was missing. Another says the pump leaked and was refunded. Others praise the spray.
What is the description?
The body is one line, Raincheck Universal Waterseal. The highlight names brick, wood and stone, breathable and UV resistant.
Hotspot is a 500 ml liquid at £19.95, 4.1 from 45 reviews. UK texts are fireplaces: colour lifted, smell strong, coverage small. One limestone fireplace was streaked. The millimetre dimensions are not credible. Two bottles in one review arrived crushed.
Pros
Cons
Best for: You are sealing a small brick fireplace and you can ventilate the room.
Less suitable: You have pale limestone, or a patio measured in tens of square metres.
Specifications
Common questions
What did UK buyers use it on?
Mostly brick fireplaces and hearths. They report a deeper colour and a wipeable face, and a strong smell.
What happened on limestone?
One new limestone fireplace was left with brown streaks. The buyer says Hotspot then suggested a cloth, and paint stripper or sanding to remove the marks.
Are the dimensions usable?
The file says 7 x 19 x 7 millimetres. That cannot be a 500 g bottle. The 500 ml and 500 g lines agree with each other.
NOON'S UP is a 500 ml bird-bath spray at £19.00, 4.0 from 857 reviews. The UK texts are mostly bowls. A minority held water. A large share still leaked after several coats. One buyer did not receive a spray bottle. There is no wildlife certificate in the file.
Pros
Cons
Best for: You have a new cast-stone bowl with a slight weep and you accept that many buyers reported failure.
Less suitable: You have a visible crack, or you need a wall sealer.
Specifications
Common questions
Did it stop bird baths leaking?
The UK texts split. Some bowls held water after several coats. Many still emptied after two to six coats or a whole bottle.
Is it a spray?
The title says spray. One UK review says the bottle poured and did not match the picture.
Does the file show it is safe for birds?
One review says safe. The listing has no certificate. That review is not a safety data sheet.
Nano Z is a 400 ml coating at £24.00, 3.6 from 32 ratings, with one UK review in the file. That review says it seems to work, calls it pricey, and waits to see how long it lasts. The bullets claim an invisible hydrophobic and oleophobic layer and name concrete, stone, marble, granite and limestone. The part number says Nanostone500 while the style name is 400 ml. Green Label Certified appears as a phrase with no named scheme in the file. There is no public UK data sheet in this capture to check coats or coverage against.
Pros
Cons
Best for: You are comparing listings and need to see how thin the UK evidence is.
Less suitable: You want a can with a public UK data sheet and hundreds of UK texts. That is not this file.
Specifications
Common questions
How many UK reviews are in the file?
One. It says the product seems to work, is pricey, and that time will tell. The 3.6 score is from 32 ratings on the listing line.
What is Green Label Certified?
The file states the phrase. It does not name the scheme or show a certificate.
Does the part number match the size?
The style name is 400 ml. The part number is Nanostone500. The weight is 478 g.
Seven amazon.co.uk listings were scored from the shelf prices, star lines and UK review notes dated 19 October 2026. This is not a laboratory test. A bullet that says breathable, waterproof or eco is not scored as a measured result. Amazon evidence is worth 30, listing fit 35, review outcome 20, and value 15. The highest score is the top pick. Among the other products scored 80 or above, the lower shelf price is best value. One of each. The weights below sum to 100.
Amazon evidence
30%The amazon.co.uk star rating is scaled to 20, then reduced when the review count is small, and a count band adds up to 10. The two parts are added, rounded and capped at 30. Full weight on the star part needs 100 reviews or more. A listing with no rating scores nothing here.
Listing fit
35%Volume that matches the weight, substrates the listing actually names, an application method, and no junk field treated as a feature. A millilitre line that disagrees with a 5 litre title and the kilogram weight scores lower.
Review outcome
20%UK review texts that describe the job the listing states. A bird bath that still leaks, or a limestone fireplace left streaked, lowers this part. Stars alone are not a result.
Value
15%Shelf price in GBP against a supported litre. The lowest price does not score when the fill is only a title. Among products other than the top pick that score 80 or above, the lower shelf price is best value, once.
Name the surface before the price. A porous wall, a hearth and a bird bath are three jobs. A title that says several litres is only useful when the weight agrees. Stars do not prove a leak has stopped, and none of these scores is a soak test.
A stone sealer on a UK shelf is not one liquid. Some cans are silicone water repellents for porous walls. Some bottles are stain impregnators for marble, limestone or a hearth. Smaller packs are sold for fireplaces, bird baths or nano coatings. Beading on a sound wall is not stain resistance, and neither product fills a cracked bird bath. Name the surface before the brand. Porous brick, render and pebbledash suit a wall water repellent.
Seal a sound, clean, dry surface. Efflorescence, open joints and wide cracks come first. Everbuild says no detergent the same day, and a second coat within one hour. Judging the colour while the can is still milky is a different mistake: these emulsions should dry clear.
Many UK reviews of the bird-bath spray say the bowl still emptied after several coats. A star line is not that result, and it is not a wildlife certificate. Everbuild forbids fishponds. Do not move a wall can onto a cracked bowl.
Raincheck Eco’s current page and an older Eco document do not state the same penetration. A 10-year line belongs to a different Universal datasheet, not to the Eco can and not to the amazon kit. That kit weighs 362 g in the file. Do not treat the title as 5 litres of sealer.
Name the surface first. Porous brick, render and pebbledash suit a silicone water repellent. Marble, limestone, slate and a hearth suit a wiped stain impregnator. Porcelain paving is usually too dense for this set, and a topical film can worsen wet slip. If vapour must still leave the wall, prefer an impregnator. Film-forming sealers can trap moisture. Everbuild 402 is an emulsified polysiloxane in water. HG product 32 is silicone-free and is wiped, not flooded.
Read the matching sheet and do not merge it with another document. Everbuild: not below 10°C, not in rain, not on paint, wood, plastic, rubber or in fishponds; no detergent first; second coat within one hour; the coat may darken. Coverage is 5 to 8 m² per litre. Raincheck Eco’s current page states 3.5 m² per litre and 1 to 2 mm, above the damp-proof course. An older figure of 2 to 10 mm, and a 10-year line, are different documents. Fix gutters, open joints and wide cracks first.
Three typical situations, each with a recommendation from this comparison.
You want the cheapest confirmed 5 litre water repellent for porous brick you can reach safely. Everbuild 402 is about £13.80, the 5 kg weight agrees with 5 litres, and amazon.co.uk shows 4.4 from 5,495 reviews. UK texts mostly describe beading on external brick. One patio review reports slip.
You want a breathable claim from a UK masonry brand and you can ignore a bad millilitre field. Raincheck Eco is about £18.00, the weight is 5.3 kg against a 5 litre title, and amazon.co.uk shows 4.4 from 2,467 reviews. The unit-count field says 5.0 millilitre.
You want a wiped impregnator for marble, limestone, sandstone or a hearth, and you will test granite first. HG product 32 is 1 litre at about £25.43, with 4.4 from 245 reviews. The steps say wipe surplus at 10 minutes. One buyer returned it for a granite worktop.
The top pick is Everbuild 402 Water Seal, 5 litres, at about £13.80. The score is 92: the 5 kg weight agrees with 5 litres, and amazon.co.uk shows 4.4 from 5,495 reviews. UK reviews describe beading on external brick. The liquid is runny, one patio review reports slip, and asbestos-roof reviews are not a listed use. The best value is Raincheck Eco at about £18.00, score 81, the lower shelf price among the other products scored 80 or above. The title says 5 litres and breathable, the weight is 5.3 kg, and a unit-count field says 5.0 millilitre. amazon.co.uk shows 4.4 from 2,467 reviews. None of these scores is a soak test.
Everbuild 402 Water Seal, 5 litre
Highest score, 92: 5 litres agrees with 5 kg, about £13.80, 4.4 from 5,495 reviews, with UK texts on brick beading. One patio review reports slip.
Raincheck Eco water seal, 5 litre
Lower shelf price among the other products scored 80 or above: about £18.00, score 81, 5.3 kg against a 5 litre title, 4.4 from 2,467 reviews. The unit-count field says 5.0 ml.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources for this comparison. Prices, stars and review counts are the amazon.co.uk listings in this set, captured 19 October 2026. Page updated 22 October 2026.
Expert source (DIY & tools): Lee Burkhill (Garden Ninja) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the amazon.co.uk listings. This is not a laboratory test.
