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Learning Center > Paints & Coatings > 
Paints & Coatings

Green Building Supply Colored Sealer Application Instructions

GBS Colored Sealer

Product Description and typical uses:

Squeeze in on front side.

Reduce size of paragraph that starts with DO NOT TAKE INTERNALLY.

BACK SIDE

Note 1: GBS Colored Sealer will not harm glass, aluminum, metal, plants or aquatic life. If it gets on glass, rinse off immediately. Not recommended for stucco or submerged areas in pools ponds or cisterns. Once dry, GBS Colored Sealer can be painted with 100% acrylic paint only (not latex paint) or glued over if desired. However, you will not be able to tile over it with mortar-based thinset.

Note 2: Pigments will settle to the bottom of the container and need to be frequently stirred and shaken during application i.e. every 10-15 minutes. For 5 gallon containers, we recommend pouring off most of the liquid into a separate container, then use a wire whisk or electric mixer to blend the pigments. Then pour most of the liquid back into the container and mix together well.

Note 3: For outdoor use, do not apply on hot surfaces on extremely hot days. This will cause flash drying which will cause an uneven color with overlap marks.

BEFORE YOU BEGIN:

1) Test for porosity with water by spritzing small droplets of water on surface with fingertips. If it soaks in within 5 minutes the GBS Colored Sealer will also soak in. If it sits there for more than 5 minutes the surface do not apply product until surface is thoroughly cleaned, etched or ground down and tested again. This is a penetrating sealer that is designed to soak deep into the substrate. If it sits on the surface it will eventually peel off.

All interior smooth troweled or power-troweled surfaces are very dense and must be etched in order open the pores. We recommend our GBS MicroEtch which is non-toxic and mild. Once applied, rinse twice and vacuum up or mop up the excess.

2) Test for color by applying a small amount with a brush in 3 different areas to make sure it is agreeable. Two applications will be required.

3) Test for neutral pH of 6-8. Use litmus paper provided or surface of in-situ pH meters.

4) Test for moisture with a moisture meter. The substrate needs to be thoroughly dry. Excess moisture will prevent full penetration. Moisture meters can be rented at most rental stores. Do not apply this product on new concrete unless it has dried out thoroughly for a minimum of 60 days. If the concrete is old and there has been no visible moisture issues, then the product should saturate easily. If you are cleaning it, be sure to use as little water as possible and mop up excess quickly to reduce moisture.

REQUIREMENTS: CLEAN, DRY, POROUS, NEUTRAL pH 6-8

Clean means free of dirt, oil, wax, graffiti and previous sealers and finishes. Clean surface well with mild concrete cleaner, rinse, mop up excess and let dry for 2 days or grind off mechanically.

If a simple cleaning does not work, do not acid etch as most acids are too strong (too toxic) and will interact with the pigments in the GBS Colored Sealer. Our GBS Industrial Cleaner will dissolve most sealers, paint, graffiti and adhesives. Please call our office for more details.

If the surface shows signs of efflorescence, rust, or red clay stains, we recommend our GBS 4-in-1 Cleaner. If there is mold, mildew or algae, we recommend our GBS Mold, Mildew and Algae Cleaner. Please call our office for more details.

Dry means no visible signs of moisture on the surface as well as underneath the surface. You may have to wait 1-2 days after cleaning (with any cleaner) or a month after a wet/damp rainy season to be sure the substrate is thoroughly dry.

Porous means that it will absorb water easily. Test by dipping fingers into a glass of water and spritzing on surface. If it soaks in and darkens the surface within 5 minutes you are good to go.

Beware of power-troweled surfaces that are extra smooth as they are too dense to absorb water easily. If your test water sits there for more than 5 minutes then you need to open the pores by cleaning, grinding or using our GBS Micro-Etch solution (non-toxic mild acid).

Neutral pH of 5-9 Freshly poured concrete is naturally caustic (high pH) which will attack any sealant, dye or coating. If pH is above 9, you can either wait until the pH lowers (which could be months) or you can use our GBS pH Reducer. This mild acid reduces the pH quickly and without toxicity. It can be sprayed or rolled and then rinsed and dried. Test pH again.

APPLICATION INSTRUCTIONS

Apply with two people--one to spray and one to back roll any excess.

Use a low pressure garden type sprayer (Hudson type or any 1-2 gallon sprayer available everywhere) and spray surface at no more than 20 psi. Shake sprayer every 10-15 minutes to keep pigments from settling to the bottom of the container.

Saturate well. Spray in small areas 4’ x 4’ and then repeat 2-4 times until the substrate is saturated. For smaller rooms, roll with ¼” mohair roller. Do not let dry in between applications. How do you know when it’s saturated? When it begins to puddle on the floor or run on a wall. At that point, use a ⅜” nap roller to spread out any excess. Remember: this is a penetrating sealer, not a topical sealer. The color is underneath the surface, not on top. Any liquid that remains on the surface will discolor and eventually peel off.

Translucent look. The appearance of this product appear like a semi-transparent stain and it will look thin and splotchy. This is normal. This is not like an opaque paint. If you want a darker look, use a sea sponge to fill in the lighter areas only after the sealer has dried a minimum of 5 hours.

Coverage: One gallon yields an average of 200 SF in two coats

Allow to Dry: Depending on weather conditions (cold damp weather will take longer to dry), light foot traffic is permitted after 5 hours. For heavy traffic allow 3 days.


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