SikaTile®-305 Pro Set

Environmental Consideration

Sika® is committed to environmental responsibility in both products produced and in manufacturing practices. Complete the LEED Product Data Request Form at SikaTile.com for detailed information based on project location. Use of this product can contribute toward LEED® v4.1 certification:

• Up to 2 points toward MR Credit 5, Regional Materials
• Up to 1 point towards IEQ Credit 4.1, Low-Emitting Materials – Adhesives & Sealants

American National Standards Institute (ANSI) — ANSI A108.5, A118.4E and A118.11 of the American National Standards for the Installation of Ceramic Tile ASTM International (ASTM)

• ASTM C109 Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2” or 50mm Cube Specimens)

• Resilient Floor Covering Institute - (RFCI) Recommended Work Practices for Removal of Resilient Floor Coverings
• Tile Council of North America (TCNA) - TCNA Handbook for Ceramic Tile Installation, TCNA EJ171 Movement Joint Guidelines
• ISO 13007-2 C1P1

Portland cement, selected aggregates, water retention additives, re-dispersible polymer

15 months from date of production when stored in original, sealed package

Store in undamaged, original, sealed package, in dry conditions at 73⁰ F (23⁰ C)

4 Week Shear Bond Strength

~3 hours

30 minutes - Passes ANSI A118.4 Section 5.3

All surfaces must be between 40ºF (4ºC) to 90ºF (32ºC) and structurally sound (deflection not to exceed L⁄360 for ceramic and porcelain tiles and L/720 for natural stone), dry, clean, and free from oil, grease, wax, paint, old adhesives, sealers, and curing compounds. Any contaminants that inhibit proper bond must be removed. Substrate preparation should be completed following ANSI A108 AN-2 “General Requirements for Sub-surfaces.” All substrates should be plumb and true; surface deviation should not exceed 1⁄4" in 10’ or 1/8” in 10’ for large format tiles. Patching, leveling or areas requiring a mortar bed should be prepared using Sika® underlayments. Movement (expansion) joints should be provided to comply with TCNA method EJ171. Concrete must be free of any negative hydrostatic pressure and/or excessive moisture.

SUBSTRATES:

Concrete Substrates: All concrete substrates should be cured a mini­mum of 28 days and accept water penetration. Test by sprinkling water on various areas of the substrate. If water penetrates, then a good bond can be achieved; if water beads, surface contaminants are present, and loss of adhesion may occur. Contaminants should be mechanically removed before installation. Concrete must be free of efflorescence and not subject to hydrostatic pressure. Smooth steel troweled floors should be roughed up using mechanical chipping, scraping, or shot blasting. Porous dry concrete, and porous backer board must be “SSD” (Surface Saturated with water but, dry to the touch) prior to the application of SikaTile®-305 Pro Set mortar.

Lightweight Cement and Gypsum Surfaces:

Lightweight or gypsum-based underlayment’s must obtain a minimum 2000 psi (13.8 MPa) compressive strength. The underlayment must be sufficiently dry and properly cured to the manufacturer’s specifications for permanent, non-moisture permeable coverings. Surfaces to be tiled must be structurally sound and subject to deflection not to exceed current industry standards. All lightweight cement or gypsum surfaces should be primed with a properly applied sealer or a primer coat of SikaTile®-100 Moisture Guard, consisting of 1 part 100 Moisture Guard diluted with 4 parts clean, cool water. Mix in a clean bucket at low speed to obtain a lump free solution. The primer can be brushed, rolled, or sprayed to achieve an even coat. Apply the primer coat to the floor at a rate of 300 ft2/gal (7.5 M2/L). Drying time depends on site conditions but is normally less than 1 hour. Extremely porous surfaces may require 2 coats. At this point, SikaTile®-100 Moisture Guard can be applied to the primed lightweight or gypsum-based surface. Refer to the individual product data sheet or packaging directions for application instructions.

Plywood Substrates:

Plywood floors, including those under resilient flooring, must be structurally sound and must meet all ANSI A108.01 Part 3.4 requirements. Maximum allowable deflection: L/360 tile L/720 stone. See TCNA F150-21 tile installations, TCNA F141-21 and F250-21 for stone.

Cement Backer Board:

Refer to TCNA F144-21 tile installations, TCNA F250-21 stone installations and follow cement board manufacturer’s instructions.

In a clean container, add approximately 5.5 quarts (5.2 liters) of clean potable water. Then add the contents of the 50 lb. (22.67 kg) SikaTile®-305 Pro Set mortar. Mix thoroughly by hand or with a slow speed mixer to a smooth, thick, trowelable consistency. Mortar consistency shall be such that when applied with the recommended notched trowel to the substrate, the ridges formed in the mortar do not flow or slump. During use, stir mortar mix occasionally. Do not add additional water. Do not add latex liquid additives to SikaTile®-305 Pro Set.

Read all installation instructions before installation. Choose a notched trowel with sufficient depth to achieve more than 80% mortar contact to both the tile and substrate for all interior applications, and more than 95% for exterior, commercial floor and wet applications. It may be necessary to back-butter the tile to meet these requirements. With pressure, apply a coat of mortar by using the flat side of the trowel to key the mortar into the substrate. With the notched side of the trowel, apply additional mortar by combing it in a single direction parallel to the shortest dimension of the tile. Spread only as much mortar as can be tiled before the product skins over. Open time can vary with jobsite conditions. Set tiles firmly into the wet mortar and push the tiles back and forth in a direction perpendicular to trowel lines to collapse the mortar ridges and to help achieve maximum coverage.

MOVEMENT JOINTS:

All expansion, control, construction, cold, saw-cut, isolation, contraction, and seismic joints in the structure should continue through the tilework, including such joints at vertical surfaces, as specified per TCNA Method EJ171 or TTMAC Specification Guide 09 30 00, Detail 301MJ. Do not cover movement joints with mortar.

Product Curing time is affected by ambient and surface temperatures and humidity. Use the following as a guideline. Allow 24-48 hours before grouting and light traffic, and 7 days before heavy or vehicular traffic. As necessary, use plywood or other load distributing protection when moving heavy equipment across tiled assembly.

Clean tools and tile with water before the material dries.