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    ​​​​​​​​​​​​​​​​​​​​​​​​​​MasterSeal AWB 600 FL Block Filler

    A one-component, water-based block filler based on Silica Fortified RubberTM chemistry. 

    As we continue the integration with Sika Corporation, please use this Product Name Cross Reference Guide​ to look up the previous Master Builders Solutions product name and the new SikaWall product name. Please contact us​​ if you have any questions.​​​

    Product Highlights​

    • Low shrinkage; fills voids and pores
    • ​Water-based; nonflammable, low toxicity​


    ​MasterSeal® AWB 600 FL is designed to prepare rough, porous concrete / masonry substrates for subsequent application of MasterSeal® AWB fluid applied air/waterresistive barrier products. MasterSeal® AWB 600 FL is also designed to promote adhesion of MasterSeal® AWB 970 FIB self-adhesive membranes to rough CMU surfaces. It can be used to create tight, seamless expansion joints and to facilitate adhesion of through wall flashing systems.​


    27.2 kg per 19-liter pail
    (60 lbs per 5-gallon pail)​


    Light Weight CMU 175 ft2/pail
    Medium Weight CMU 200 ft2/pail
    Normal Weight CMU 250 ft2/pail
    Actual results may vary widely depending on substrate texture and porosity.​​