CONCRETE SPALL REPAIR PERFORMED CORRECTLY

Hawaii Concrete Coating Service

Concrete coating is a great way to extend the life of your Hawaii deck or other concrete surface.

Why would you use a concrete coating?

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Typically, most exterior masonry surfaces in Hawaii are maintained by regular applications of high quality acrylic latex paints. However, even the best paints have a tendency to fail when applied over masonry surfaces. Surface cracks develop as our Honolulu buildings age. That's when our concrete coatings such as EWCs are needed.

Most concrete cracks are relatively small ranging from a hairline thickness to 1/8" in width, but go through remarkable fluctuations in size as the masonry substrate experiences changes in temperature or building movement. When conventional paints experience this level of stress, they react by cracking.

Once the masonry substrate is exposed to the harsh elements in Hawaii it is only a matter of time until moisture finds its way through the cracks and larger sections of concrete begin to break away, resulting in further deterioration, also known as spalling.

A better and more advanced alternative to conventional acrylic latex paints on masonry substrates are Elastomeric Wall Coatings, also referred to as "EWCs" that contain 100% acrylic binders. Under stress EWCs can stretch several times their original dimensions. As the masonry substrate expands and contracts, the elastomeric coating can accommodate the movement without cracking and protect the surface from the elements.

Latex paints are normally applied on concrete at a thickness ranging from 1 - 3 mils, while Elastomeric Wall Coatingss are formulated to form much thicker films (10 - 30 mils). Consequently, EWCs stretch to bridge cracks and conceal surface imperfections.

Moreover, with proper surface preparation and proper application of EWCs, the life span is more than double that of conventional paints for only approximately 40% more cost over conventional paints.

A masonry sustrate that is currently coated with elastomeric coatings can be repainted with quality 100% acrylic latex paint. It is recommended that a top coat of 100% acrylic semi gloss be installed over newly applied EWCs if the building sits on the downwind side of a busy freeway or boulevard or in an area where dirt and diesel soot are in excess. The semi gloss top coat will increase washability of the surface when it rains.

Like conventional paints, quality EWCs are available in a broad range of colors.

It is essential that water not be allowed behind EWCs, so all caulking must be in good shape and wall caps or roof parapet walls must also be waterproofed. Cracks should be properly routed and caulked with a quality polyether caulk and all spalled concrete should be repaired using quality repair concrete. EWCs should not be applied to ceilings and surfaces where water normally gets behind or beneath, such as retaining walls and below grade surfaces.

The advantages of applying EWCs largely outweigh the application of conventional paints. EWCs are superior in durability and protection; with more then double the life span for only 40% more cost over conventional paints and the surface is waterproofed, thus preventing spalled concrete...it's a no brainer


CONTACT US

Seal Masters of Hawaii
80 Sand Island Access Road
Honolulu, Hawaii 96819 -- USA

Tel: (808) 841-7602
Fax: (808) 842-6546
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