Stone Mason^® Multi-Purpose Mortar is a polymer-modified, dry latex/Portland cement compound formulated for the installation of ceramic tiles, glazed floor tiles, wall tiles, pavers, quarry tiles and slate.

Suitable Substrates

• Masonry, concrete, exterior-grade plywood, gypsum board, cement backer board, concrete block, brick, ceramic tile and cured Portland cement beds

Coverage

• Walls and mosaics: 18.1kg (40 lb) covers 7.4m² (80 sq ft)
• Floor tiles, pavers, quarry tiles and slate: 18.1kg (40 lb) covers 4.8m² (52 sq ft)
• Large pavers and modular pavers: 18.1kg (40 lb) covers 3.7m² (40 sq ft)

Surface Preparation

Remove all dirt, dust and loose debris from the surface area where the tile will be installed. Dampen porous areas with clean water, but do not saturate.

Mixing

Use clean cool water, clean pail and power mixer. Mix dry powder into water. If using power mixer, do not exceed 150 rpm. A 40 lb (18.1 kg) amount requires approximately 4.5 qt (4.5 L) of water. Mix to a lump free, trowelable consistency. Allow mixture to set for 5 minutes, and then remix prior to using. Approximate usable time is 1 hour (inside mixing container). Proper mortar consistency: ridges formed in the mortar will not flow or slump. During use, remix mortar occasionally.

DO NOT USE ADDITIVES.

Application

• Spread a thin coat of mortar about 1/8” (3 mm) thick over a small area of the surface to be tiled, about 3–4 sq. ft. (0.3 to 0.4 m²). Use the flat side of the trowel.
• Immediately follow with a heavier coat and comb using the notched side of the trowel at a 45° angle, approximately 1/4” (60 mm) thick for walls and countertops and 3/8” (90 mm) thick for floors.
• Place tile into mortar within 10 minutes of combing.
• Tap the tiles into place with a rubber mallet or hammer and soft wood block.
• Check alignment, spacing and level.
• Wait 24 hours prior to grouting walls and countertops and 48 hours before grouting floors.

Temperature

Apply to surfaces that are frost-free and will stay above 50° F (10° C) for 72 hours. For exterior use, do not apply if rain is expected in the next 24 hours.

Coverage

• Walls and Mosaics: 80 sq. ft / 40 lb (7.4 m2 / 18.1 kg)
• Floor Tiles, Pavers, Quarry Tiles & Slate: 52 sq. ft / 40 lb (4.8 m2 / 18.1 kg)
• Large Pavers and Modular Pavers: 40 sq. ft / 40 lb (3.7 m2 / 18.1 kg)

Tips

• Do not use over hardboard, gypsum plaster, particleboard, cellulous & dry wallboard, painted or treated surfaces.
• Use over plywood ONLY on residential floors or countertops. Joist spacing not to exceed 16” (41 cm).
• Surface must be dimensionally stable and free of cracks, waxy or oily films, and curing compounds
• Do not disturb set tiles.
• Shelf life: one year if package not opened.
• Store in a dry location.
• Do not use mortar after initial set in pail.

Caution

Corrosive. May cause eye injury. If product gets into eyes flush repeatedly with water and seek medical attention. Avoid skin contact. If contact occurs, wash with water. Protective eyewear and gloves are recommended.

KEEP OUT OF REACH OF CHILDREN

The consumer shall satisfy themselves of the suitability of this product for the intended purpose. Weather, applicator's skill and surface conditions are beyond manufacturer's control. We, therefore, limit our liability to replacement of defective material only, within one year of proof of purchase.