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Astra Glaze®


ASTRA-GLAZE-SW+® glazed units are pre-faced architectural concrete masonry blocks that have a thermoset glazing compound permanently molded to one or more faces. This glazing compound is cured and heat- treated in gas-fired tunnel kilns — thus becoming an integral part of the unit. The glazed facings are molded in individual molds, ensuring dimensional uniformity of the glazed facing regardless of minor variations in the block.

Glazed concrete blocks manufactured in Pennsylvania are lightweight units conforming to ASTM C90. Glazed concrete units manufactured in Arizona are medium weight units conforming to ASTM C90. The glazed surface features a satin-gloss finish and externally heat-polymerized cast-on facing confirming to ASTM C744. All units contain Trenwyth-approved integral water-repellent CMU admixture at the time of manufacture to resist mold and moisture.


One-Step Installation: ASTRA-GLAZE-SW+ units provide finished load-bearing or non-load-bearing walls in a single trade, one-step operation. You save time and money.

Maintenance Free Impervious Finish: The most advanced graffiti-resistant glazed concrete masonry units on the market are now virtually maintenance-free. Special manufacturing processes are used to provide a permanent, impervious ASTRA-GLAZE-SW+ satin glazed finish with exceptional resistance to staining, abrasion, impact and chemicals.

Easy-to-Clean: Special proprietary formulations create an impervious, sanitary and chemical-resistant facing. USDA-approved ASTRA-GLAZE-SW+ glazed masonry units are virtually impenetrable by graffiti, spray paint, permanent markers, grease and crayon. Graffiti and dirt wipe clean easily, making ASTRA-GLAZE-SW+ glazed masonry units the perfect choice for your institutional, commercial or industrial project.

Mold and Moisture Resistant: Manufactured with an integral water repellent admixture, ASTRA-GLAZE-SW+ units are ideal for high moisture or sanitary environments.

Low Life-Cycle Costs: The ASTRA-GLAZE-SW+ satin finish will last the lifetime of your building and eliminates the need to repaint or refinish.

Weather Resistant: Using the most up-to-date technology, ASTRA-GLAZE-SW+ units provide outstanding colorfastness. Plus, built-in ductility reduces the possibility of cracking and crazing in adverse conditions. That’s what the “SW” stands for in ASTRA-GLAZE-SW+! ASTRA-GLAZE-SW+ withstands severe weather!

Design Flexibility: ASTRA-GLAZE-SW+ units offer you freedom of expression in design through a wide variety of colors, shapes and scoring patterns. Trenwyth even produces rounded corners and edges for ADA compliance!

Custom Color Matching: Trenwyth is very proud of our ASTRA-GLAZE-SW+ Custom Color Matching capabilities. We can match almost any color to meet your design needs.

Recycled Content: All ASTRA-GLAZE-SW+ units contain significant pre-consumer recycled content that may earn LEED® Rating Points for your building. Call Trenwyth today for more information 1-800-233-1924.

Fire Protection: Depending on the thickness and internal configuration of the block, ASTRA-GLAZE-SW+ offers up to a 4-hour fire rating.

Sound Absorbing: ASTRA-GLAZE-SW+ is also available in ACOUSTA-WAL sound-absorbing units. Together ASTRA-GLAZE-SW+ and ACOUSTA-WAL are your indoor/outdoor solution to sound absorption and control.

Applications: Interior and exterior