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Understanding Sealer Coatings

There are several different ways to seal the sandblasted surface on glass. On the majority of sandblasted glass produced by Milestone Mfg., a proprietary polymer coating (part no. 7325) is applied directly after the sandblasting process. This sealer coating is recommended for all interior glass applications installed in a dry environment. For exterior installations, or moisture prone environments, Milestone Mfg. Recommends the application of our renewable water repellent exterior sealer coating (part no.XXXX). Both of these products are environmentally friendly and have been approved for application.

Milestone Mfg.'s interior sealer has a smooth, uniform, soft satin appearance that is almost undetectable, enhancing the sandblast finish. This sealer coating aids in the resistance of contamination to the sandblasted surface and makes the surface easier to clean than raw sandblasted glass. Though this sealer coating aids in protecting the sandblasted surface, it too can be susceptible to damage by abrasion, staining, or chemical degradation. Proper cleaning practices are imperative and must continually be disseminated throughout all maintenance personnel. Re-sandblasting and re-seal coating the glass is the only way to repair damage to the sealer coating.

Milestone Mfg.'s renewable water repellent sealer has a slightly different look than the interior sealer. This sealer also aids in the resistance of contamination to the sandblasted surface and makes the surface easier to clean. The sealed surface virtually repels anything from sticking to it. Buffing with a clean dry cloth can often clean the sealed surface. Unlike the interior sealer, this sealer can be reapplied bringing the sandblasted surface back to a pristine condition. This sealer is not recommended on butt-glazed applications, as the tape used in this glazing technique will not stick to the sealed surface. It is possible to apply this sealer to the glass after glazing. Milestone Mfg. will share its knowledge of the appropriate application techniques if desired. Milestone, however, cannot be held liable for the appearance of the sandblasted glass when seal coated by others.

Both types of sealer coatings require specific drying times. These drying times can fluctuate with temperature and humidity. The interior sealer is always allowed to dry for a minimum of twelve hours before handling. The renewable sealer can dry within two hours.

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