WA Sealers

Perth based supplier of innovative paving, stone & concrete cleaning and sealing products

Pro Seal 770 Concentrate

  • 5L Concentrate makes 25L sealer
  • 5L Concentrate seals up to 125m2 one coat; 20L Concentrate up to 500m2
  • From $1.54/m2 (RRP)
  • Price includes GST
  • Free Shipping within Australia
  • Trade & bulk order discounts available. (Click Here)




ProSeal 770 Limestone Sealer Concrete polishing grout Grouting compound

Pro Seal 770  is a water based, eco friendly, high purity, UV Stable acrylic polymer. It is very versatile and has many uses. It has good bridging capabilities, excellent adhesion and impressive binding abilities. These properties give it exceptional performance as a limestone sealer, a UV stable primer, a grouting binder and as a colour stabilising agent. Pro Seal 770 is made in Australia for Australian conditions. It is supplied as a 5 times concentrate for reduced shipping cost and a small carbon foot print.

Pro Seal 770 Limestone Sealer

ProSeal 770 Limestone SealerLimestone is very porous and quite friable. This is true for natural limestone and reconstituted products made from limestone, such as retaining blocks and liquid limestone. Due to their porous nature they soak up lots of moisture. This can be from rain, sprinklers or even just rising damp from moisture in the ground. As the water evaporates from the surface it leaves behind salts in the water. These salts form crystals in the surface pores. As they form they crack open the pores in the limestone. This is known as salt damage. These micro fractures significantly increase limestone erosion rates.

liquid limestone sealer

Pro Seal 770 is an exceptional limestone sealer and liquid limestone sealer. The polymer penetrates deep into the substrate and forms a strong but flexible matrix. This provides strength and stability to friable materials.  Further, the sealer is highly breathable. This enables water molecules to pass through the sealer, without the salts. This ensures the limestone can dry out without creating efflorescence and without blistering the sealer. These properties enable Pro Seal 770 to protect limestone and other soft materials from erosion and premature weathering.

The breathable nature of Pro Seal 770 limits algae, mould and moss growth. All these organisms are common on limestone because of it’s porous nature and the surface texture. There’s plenty of places for them to hold onto and there’s often plenty of moisture wicking through the pores to keep them alive. Pro Seal 770 bridges these micro-pores to make it harder for these microbes to get a foothold. It also keeps the surface dry. The moisture that passes through the sealer does so as a vapour, not a liquid. This allows the substrate to dry, without watering the microbes.

Due to it’s high flexibility Pro Seal 770 limestone sealer is not as wear resistant as Pro Seal 896 & Pro Seal 898. As such it is best to use as a stand alone sealer only in low traffic areas. It is ideal for sealing retaining walls, garden features and feature limestone. However, in high traffic and high staining environments, an extra layer of protection is highly recommended. Apply a final seal coat of Pro Seal 896 for best results. Or use Pro Seal 898 for extra gloss.

Pro Seal 770 is a Colour Stabilising Sealer

ProSeal 770 Colour Stabilising SealerProSeal 770 will enhance and prolong the colour fastness of all oxide coloured cement based materials. Pro Seal 770 is also cementitious compatible. This means it can be used as an admix for poured applications. When used as an admix binder for screeds and toppings it adds both strength and colour enhancement. These properties make ProSeal 770 very popular for use in concrete resurfacing and as a first coat when sealing coloured concrete.

Pro Seal 770 is a Clear, UV Stable, Primer

Pro Seal 770 is a very high purity acrylic. It produces a very high clarity clear polymer matrix. And it’s highly UV stable, so it will stay that way for a very long time. This makes it a very good primer for use under clear coatings. It has excellent bridging capabilities and very strong adhesion. It will efficiently fill up the larger pores in highly porous materials.  This will ensure final coats do not penetrate too deep into the substrate. But will remain near the surface where it is most needed. Using Pro Seal 770 as a pre-sealer will result in better product coverage and lower overall sealing costs.

A two step, ProSeal 770/ProSeal 896 sealing system is recommended for all highly porous traffic-able areas.

Pro Seal 770 Grouting Binder

Pro Seal 770 is an excellent grouting binder for polished concrete floors. It binds fine grinding dust from the grinding and polishing processes to fill in pinholes, voids and cracks. Since the dust comes from the floor, colour matching is close to perfect. This often produces a completely seamless repair. For best results use diluted Pro Seal 770 solution in place of water in one or more wet grinding steps.


ProSeal 770 Grouting Binder
Concrete Grouting with Pro Seal 770 by Visual Designs & Concrete Polishing



Additional information


Water Based Sealers


5 Litre, 20 Litre, 250ml


Colour Enhancing, Satin Finish


Water Based


Oil Repellent, Penetrating, Reduces Marking, Stain Protection

Product Type

Sealer, Primer


  • Stabilises the richer natural tone of powder colour oxides.
  • Non-Hazardous Material Classification.
  • Adds surface flexibility to cement based construction materials.
  • Excellent bridging properties for filling voids in highly porous materials.
  • Excellent grouting binder for polished concrete.
  • Easy to apply / water clean-up.



Curing Time:
– Touch dry: 30-60 minutes
– Recoat: 24 hours
Coverage:  20-25m²/litre depending on surface porosity
Dilution:   1:4 (1 part product : 4 parts water).
Clean-up:  Water
Equipment needed:  Pump sprayer or WBS CSU (Commercial Spray Unit) & broom
Odour:  None


First coat sealer for oxide coloured concrete, decorative concrete, new installation natural stone.

Excellent grouting binder when polishing concrete.

Can be used as a pre-sealer to fill voids in highly porous materials prior to sealing with Pro-Seal 896.



Dilution: Pro Seal 770 is a highly-concentrated product that requires dilution with water prior to application.

Mix the neat product thoroughly prior to dilution.

Suggested dilution rates are:

1:4 (1 part product : 4 parts water)

Application: Diluted solution should be mixed thoroughly prior to application. Apply using the CSU (Commercial Spray Unit) or suitable spray applicator.

Best applied to a wet/damp surface to help draw product into the surface material. Use white colour of the product as a visual aid to achieve even coverage.

Use a soft bristle broom to sweep out any pools that develop.

Allow to dry clear / 24 hours prior to sealing with Pro-Seal 896.

Polished Concrete Grouting Binder:

Apply diluted solution to the surface during the finer wet grinding stage of the polishing process.  Seal with Pro-Seal 896 for best results.

Wash all equipment with water after use.

Any overspray on adjacent surfaces such as glass, metal or painted surfaces should be wiped off with a damp rag before the product dries.


Environment & Safety

All WBS Products are environmentally responsible. Pro Seal 770 is an environmentally friendly product that is:

  • Contains no petroleum solvents or silicone compounds
  • Non-hazardous & Non-Toxic
  • <100% biodegradable
  • VOC < 2 g/L

Store products in a cool dry area, keep product out of direct sunlight.

Keep out of reach of children, wash up any spills by flushing with water, avoid  contact with eyes and skin, for professional use only, keep product out of direct sunlight, store in cool dry area.

Classified as Non-Hazardous Material.


Data Sheets

Technical Data Sheet – PS770
Safety Data Sheet – PS770

10 reviews for Pro Seal 770 Concentrate

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Based on 10 reviews
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  1. admin

    Since liquid limestone generally has a lot of texture and the ProSeal products are low build, generally the ProSeal 770 and or ProSeal 896 are very good options which shouldn’t cause any slip issues. If you don’t want to risk slips at all then go the ImperGuard Ultra 4 in 1. It won’t alter the grip at all and is specifically developed to prevent algae/mold/moss, which is the most common issues with liquid limestone.

  2. 4 out of 5


    Looking for a poured limestone sealer for pool surrounds Must be non slip Suggestions please

    (0) (0)
  3. 4 out of 5

    wayne Gidman

    time will tell on the product lifespan, but cover area as per info provided

    (0) (0)
  4. 5 out of 5


    Great to be able to buy in small quantity for my project

    (0) (0)
  5. 5 out of 5

    Paul Fieldwick

    Excellent product and service.

    (0) (0)
  6. 5 out of 5

    Danny S.

    Great info from supplier, fast shipping, great product!

    (0) (0)
  7. 5 out of 5

    Wayne Franklin

    If you want lasting results, with no gimmicks, go Proseal.

    (0) (0)
  8. 5 out of 5


    Fantastic product!

    (0) (0)
  9. 5 out of 5


    Great , worked well, so easy to apply

    (0) (0)
  10. 5 out of 5

    Nick Kosovich

    5 stars

    (0) (0)
  11. 5 out of 5


    Great product for sealing very porous surfaces. I use this as part of a two step seal with ProSeal 896.

    (1) (0)
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Q & A

Just recoated my liquid limestone driveway with 770 and it is a little sticky after 24 hours. Is it okay to apply a coat of 860 over this now? Rod asked on January 8, 2024

Yes, that's what it is supposed to do. It helps the top coat ProSeal 896 or 898) adhere better to the first coat.

admin answered on January 12, 2024 store manager
(0) (0)

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