Water Based Sealer FAQs

Frequently Asked Questions...

environmentally friendly pavement sealer


Q:    I’ve tried water-based sealers before, but they are no good.  How are WBS products different?

A:    Traditional water-based sealing products are based on a latex chemistry and they suffer from several shortfalls. However, the WBS range of sealers are created using new technology and are specifically designed to overcome all the shortfalls of the older generation of water-based products.


Q:    I’ve heard that penetrating sealers aren’t that good for stains?

A:    Most penetrating sealers on the market are purely water repellers and will not do much if anything to stop stains, particularly oils and ground in dirt. The WBS products are different. They form a physical barrier, like film forming sealers, but because the polymers are nano-sized they penetrate below the surface and form a matrix seal from the inside out. Once cured this matrix seal stops stains from penetrating right down at the molecular level.


Q:    Why are the products so expensive?

A:    Firstly, Water Based Sealers products are premium quality products. Second, all the products are sold as concentrates that are diluted with water prior to application. As such a container of WBS sealer will typically go about 4 times further than the same amount of a competitor’s product.


Q:    Why are the products sold as a concentrate?

A:    By selling the product as a concentrate we can minimise cost and environmental impact. There is less packaging, less freight cost, and lower freight-related emissions. The products can then be easily diluted with the water source at the point of use.


Q:    Does it give a "wet look"?

A:    Using Pro Seal 770 as a primer prior to application of Pro Seal 896 with give a subtle colour enhancement without making it look fake, this colour enhancement is permanent. Almost all the ‘wet look’ sealers on the market will not hold that depth of colour for long. Initially they significantly darken the surface but after a week the colour depth will be about half of what it was when wet. After about 3 months or so there will be no discernible difference between a ‘wet look’ sealed surface and a Pro Seal surface.


Q:    What is the durability of Wet Look Sealers?

A:    The colour enhancement provided by most solvent acrylics is somewhat temporary. The colour developed at the time of application is similar to a wet surface, however, this will sufficiently lighten as the sealer cures and will continue to fade over the next 6 months or so. After six months in the sun a solvent wet look will not be noticeably darker than a water-based seal. Further, solvent based acrylics generally go yellow with exposure to UV. Using Pro Seal 770 to subtly enhance and stabilise the colour will not make the surface initially as dark as a wet look solvent, but it is a permanent enhancement that will not yellow.


Q:     Acrylic sealers – are they water based or oil/solvent based?

A:    Many people assume acrylic sealers are only oil/solvent based, however, acrylic sealers are available in either an oil or a water base.


Q:    What’s the difference between oil/solvent based and water-based products?

A:    There are many different types of products in each category and each vary significantly in their appearance and properties. WBS products are founded on advanced chemistry that makes them superior in almost every way to existing water-based products. In general, the following differences apply between WBS products and oil/solvent-based film formers:

 

Water Based Sealer Vs Solvent Based Sealer

Water Based Solvent Based
Breathable – moisture can diffuse slowly through the sealer Non-breathable moisture in the substrate get trapped under the seal
Low/no VOC’s Contains high levels of VOC’s
Will not significantly darken the surface Can darken the surface to create a wet look
Will not re-emulsify in water or oil once cured Will re-emulsify in oil’s and other solvents
Nano film (thin tenacious film) High build sealer (thick film)
Penetrates deep into the substrate for ultimate adhesion Sticks to the outer surface
Non-toxic, water clean-up, safe for people and the environment Toxic, solvent clean-up, emits harmful VOC’s, encourages single use throw away equipment
Natural, Satin & Gloss finishes High gloss finishes
Up to 25 years as a matrix seal, 3-5 as a wear film 2 - 5 years
Can be resealed many times without stripping Needs to be stripped off prior to reapplication for best results


Q:    What is a breathable sealer?

A:    A breathable seal enables moisture trapped in the substrate to slowly permeate the sealer so that it can stay dry. This is particularly important in area’s that are often wet/damp, such as pool areas, sunken outdoor areas, pavement next to raised garden beds etc. Solvent film formers trap this moisture in and this can lead to issues such as discolouration, delamination and eventual failure of the seal.


Q:    If a seal is breathable and moisture can get through, won’t stains get through too?

A:    Water molecules are much smaller than the molecules that make up most common stains. Pro Seal 896 and Pro Seal 898 have been designed to leverage this difference. The tightness of the developed matrix is such that water molecules can work their way through, but other water-soluble stains can’t. All solvent based stains are repelled as they are polar in nature and are physically incompatible with the pores in the matrix structure.


Q:    What is the life of the sealer?

A:    The WBS products penetrate below the surface to form a matrix within the substrate. This matrix strengthens and stabilises the surface and the surface of the material sealed protects the sealer from wear and tear. As a result, this matrix will remain intact for the life of the pavement. We normally assign this service life to be 25 years, but, this will vary depending on the type of materials sealed, how much traffic the surface receives and what forces the surfaces is exposed to. The portion of the matrix that extends above the surface is UV stable and very durable, but it will wear away like any other wear surface. A single coat of Pro Seal should be reapplied every 3-5 years to rebuild that wear layer and protect the underlying substrate/polymer matrix.

 

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