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Paving Sealer Facts

Here are some common questions we are asked with regards to our paving sealers.

If you do not find the information you are looking for please get in touch and we will be pleased to help.

Also see the product data sheets for further information

We manufacture high quality sealers here in the UK for direct sales to the Trade, General Public DIY’er and to other retailers

To reach the same protection level as 1 coat of our product you would have to apply 3/4+ coats of a similar product purchased from the big DIY stores

Also there are some sellers on well known auction sites selling sealer at very cheap prices, “how do they do it”?

made from paint resin

low grade resins

made from recycled paint

resin content is very low, ie 5% resin – 95% thinners

These cheap products will only save you money if you don’t purchase them

Our products are manufactured to BS5750/ ISO 9001 using high grade resins with NO fillers, thickners or extenders.

Our PREMIUM ULTRA Sealer range is formulated with high performance, pure co-polymer acrylic resin solids, suspended in a unique blend of the highest quality organic solvents.

High solids pure resin content
Tough and durable
One or two coat application
Non yellowing
100 % UV stable
Bonds and stabilises jointing sand rock hard in Block Paving joints

Our solvent free ECOSEAL range is our latest high performance Acrylic sealer, utilizing cross linking resin technology and free of high VOC solvents like Xylene makes this one of the most safest sealers for the Trade and DIY



Which is your most popular product for sealing block paving?

How do I use the product?

What does solids mean?

Is solids content most important?

Which are better, Acrylic (high solids) or Polyurethane (PU) sealers?

What will happen if I get caught out by the rain or residual damp after I’ve just sealed my paving?

What’s a bloom?

How do I rectify a bloom?


Which is your most popular product for sealing block paving?

For non enhancing colour it is our Ecoseal Ultra HD block paving sealer.

For colour enhancing it is our Premium Ultra HD block paving sealer.

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How do I use the product?

Using our products are straight forward, a good tip is to remember is apply sealers in dry conditions and ensure the surface is dry.

You can apply sealer by:

Course droplet low level pressure sprayer

Most contractors these days will use a sealer sprayer that is made specifically for the job.

Garden chemical sprayers are not right for the job as they block up quickly and produce a conical spray pattern most of the time. The ideal spray pattern should be a fan jet.

Application instructions can be found on the product page and each container is labelled.

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What does solids mean?

Solids - is an alternative description for the resin within the product.

This description gives you an indication of the resin content within the sealer.

Higher the resin content = the more resin left on the paving = the more the paving is sealed.

Most paving sealers available from Builders Merchants, big DIY stores and some websites are very low resin solids.

The basic fact to remember when buying paving sealer is that whoever you’re buying from, if their sealer has a good resin solids content they will make sure you know.

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Is solids content most important?

Solids content should be a main consideration along with choice of resin, quality and performance.

What coverage should I get from 20 ltrs (1 drum) of sealer?

This is a bit of a grey area as some surfaces are more porous than others; for example, block paving is more porous than printed concrete, so block paving will take more product per square metre.

The application method also makes a difference, you may find that rolling or brushing makes the product go further than spraying.

There is also a difference between the correct coverage and making the sealer spread as far as possible, the more you spread the product, then the less product you will end up with on each square metre and the less each square metre is sealed.

You won’t save money by making the sealer spread as far as possible and coverage rates should only be taken as a guide.

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Which are better, Acrylic (high solids) or Polyurethane (PU) sealers?

The true answer is that they are both good and are suited to different applications.

You also have to consider the use of the surface to be sealed, ease of application, applicators skill and experience level.

Cost is a big factor, our top of the range Premium ultra HD high solid Acrylic sealers are £89.00 for a 20ltr drum. An equivalent top of the range paving Polyurethane sealer will be around £200/240.00.for 20ltr i.e. RESIBLOCK.

There are no high quality low priced paving PU’s, cheap PU’s are usually for the paint industry, very low in PU or are a mix of low grade PU’s & Acrylic.

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What will happen if I get caught out by the rain or residual damp after I’ve just sealed my paving?

Our Ecoseal solvent free range will not be affected but you will probably need to apply another coat when dry.

All solvent based sealers will probably bloom.

Our Premium Ultra range is specially formulated to resist blooming where possible.

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What’s a bloom?

A bloom in the sealer can take the appearance of a milky white or silvery cloud affect and may be apparent in patches, spots or across the whole area after drying.

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How do I rectify a bloom?

Our Premium Ultra range:
When dry, brush or spray Bloom Rectifier to affected areas only.
Repeat if necessary, allow to dry and re-coat.
If you experience a bloom in your finished sealed surface please understand that this is not a product fault and is rectifiable

Not as simple, Bloom Rectifier will have no effect.
Surface will have to be mechanically abraded (grit blasted) or stripped with Nitric acid then cleaned and resealed


For further installation advice please download guides, email or call Technical advice on:

01202 620377 – Office
07899 748333 – Office mobile
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Sealers Direct Ltd

Registered Co. Number 8060924


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