Ultra-Premium Polymer-Modified Thin Set Mortar 

 Bostik Reflex® Thin Set Mortar

Ultra-Premium Polymer-Modified Thin Set Mortar

Bostik Reflex® ultra-premium polymer-modified thin set mortar is for interior or exterior installations to set all types of porcelain, saltillo, ceramic, glass, granite, slate, marble, limestone, thin porcelain tiles, large porcelain panels and dimensional stone tiles. Reflex® has excellent mixing and application properties. 

Features 

• Excellent working characteristics 

• For interior and exterior use on vertical and horizontal surfaces 

• Interior/exterior floors, Interior/exterior walls, interior/exterior countertops 

• Substrates 

• Concrete

• Structurally-sound, exterior grade plywood (interior/dry use only) 

• Cementitious backer board

• Bostik Ultra-Set® Advanced

• Bostik Black-Top™

• Bostik GoldPlus™

• Existing, well-bonded vinyl/VCT or ceramic tile

• Cutback adhesive residue (dry only)

• Materials 

• Porcelain

• Saltillo

• Ceramic

• Glass

• Granite

• Slate

• Marble

• Limestone

• Thin porcelain tiles

• Large porcelain panels

• Dimensional stone tiles

Specifications 

• Mixing: Mix with water only. Using a slow speed mixer (<150 rpm), mix 5 to 6 quarts of clean, potable water to 50 lbs. of Bostik Reflex®. Mix to creamy consistency. Do not re-temper by adding more liquid. 

• Curing: Keep all foot traffic off the installation until tile is firmly set (approximately 12 hours). Set times vary based on temperature, humidity, porosity of substrate and tile size.

• Grouting: Depending on ambient, slab, and material temperatures, grouting can generally begin after 12 hours with most Bostik grouting systems. Allow 48 hours before grouting with any Bostik EzPoxy™ or any 100% solids epoxy grout. Allow 24-48 hours before grouting with Bostik pre-mixed grouts. Allow 7 to 10 days before grouting porcelain tile panel or thin porcelain tile installations.  

• Storage/Shelf Life: Store in a clean, dry area, off the ground on a pallet, not affected by freezing or hot temperatures. Shelf life is one year from the date of manufacturing in unopened bags.

• VOC: 0 g/L (as calculated per SCAQMD 1168) 

• Typical Physical Properties 

• Open Time at 70°F (21.1°C): 60-80 minutes 

• Initial Set at 70°F (21.1°C): 8-10 hours 

• Final Set at 70°F (21.1°C): 10-15 hours

• 28 Day Shear Strength: 

• Porcelain Tile: 576 psi 

• Glazed Wall Tile: 560 psi 

• Quarry Tile: 425 psi 

• Quarry to Wood: 300 psi 

• 28 Day Compressive Strength: 3600 psi