SikaTile®-350 Flex Set
SUPERIOR GRADE POLYMER MODIFIED THIN SET MORTAR
SikaTile®-350 Flex Set is a superior grade, polymer-modified, Portland cement, flexible, multi-purpose thin set mortar with exceptional features offering flexibility, higher bond strengths, extended adjustability and open times. It can be used for both interior and exterior installations of tile in most residential and commercial floor and wall applications. This mortar contains a high blend of dry polymers, resulting in excellent adhesion to the substrate and tile. SikaTile®-350 Flex Set, features innovative Dustless Technology producing approximately 80% less dust than ordinary thin sets and is designed to promote cleaner working conditions and reduce mess. It uses less water and is creamier and easy to spread.
- Ideal for Exterior Vertical Installations
- For Glass, Porcelain, Ceramic Tile and Natural Stone
- Adheres to Non-Absorptive Surface
- For interior and exterior floors and walls
- Dustless formula – provides approximately 80% less dust than ordinary mortars
- Cleaner working conditions by minimizing dust
- Creamier and easier to spread
- Uses less water for consistent hydration and quicker drying
- Longer working time
- No-Slake - No wait. Just mix, trowel, and install
- Mold and mildew resistant
Usage
SikaTile®-350 Flex Set provides flexible, high strength for flat, even installations and is suitable for bonding the following types of tile and stone:- Brick and thin brick
- Cement-based precast terrazzo
- Impervious porcelain and glass tile
- Natural stone tile
- Vitreous, semi-vitreous or non-vitreous tile:
- Ceramic, mosaic, quarry, cement body tile
- Brick Masonry
- Cement Backer Board1
- Cement Mortar Beds
- Cement Plaster
- Cement Terrazzo
- Ceramic Tile and Stone
- Concrete
- Concrete Masonry
- Exterior Grade Plywood2
- Gypsum Wallboard2
- SikaLevel®SikaTile® Membranes
- Approved SikaLastic® Under Tile Waterproofing
2 Interior Use Only.
Advantages
- Ideal for Exterior Vertical Installations
- For Glass, Porcelain, Ceramic Tile and Natural Stone
- Adheres to Non-Absorptive Surface
- For interior and exterior floors and walls
- Dustless formula – provides approximately 80% less dust than ordinary mortars
- Cleaner working conditions by minimizing dust
- Creamier and easier to spread
- Uses less water for consistent hydration and quicker drying
- Longer working time
- No-Slake - No wait. Just mix, trowel, and install
- Mold and mildew resistant
Packaging
50 lb. (22.68 kg.) bag
Color
Gray and White
Product Details
ENVIRONMENTAL INFORMATION
Sika® is committed to environmental responsibility in both products produced and in manufacturing practices. Use of this product can contribute towards LEED® v4.1 certification:
- Up to 2 points towards MR Credit 5, Regional Materials
- Up to 1 point towards IEQ Credit 4.1, Low-Emitting Materials – Adhesives & Sealants
APPROVALS / STANDARDS
American National Standards Institute (ANSI) — ANSI A108.5, A118.15E, 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 C2EP1
Chemical Base
Portland cement, selected aggregates, water retention additives, re-dispersible polymer
Shelf Life
15 months from date of production when stored in original, sealed package
Storage Conditions
Store in undamaged, original, sealed package, in dry conditions at 73⁰ F (23⁰ C)
Slant Shear Strength
4 Week Shear Bond Strength
| Property | Test Method | Requirement | Typical Results |
| Porcelain Tile | A118.15 Section 7.2.5 | > 400 psi | 400 - 450 |
| Quarry Tile to Plywood | A118.11 Section 4.1.2 | > 150 psi | 150 - 250 |
ISO 13007 Classification
| Classification Code | Classification Requirement | Results |
| C2 (cementitious, improved adhesion) | ≥ 145 psi (1 MPa) after standard aging. Heat aging, water immersion and freeze/thaw cycles | Pass |
| E (extended open time) | ≥ 72.5 psi (0.5 Mpa) after 30 minutes | Pass |
| P1 (normal adhesion to plywood) | ≥ 72.5 psi (0.5 Mpa) | Pass |
Application
Mixing Ratio
5 quarts (4.75 liters) of clean potable water per 50 lb. bag
Pot Life
60 - 90 minutes
Open Time
> 30 minutes - Passes ANSI A118.15 Section 5.3
Cure Time
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.
Coverage
MIXING
In a clean container, add approximately 5 quarts (4.75 liters) of clean potable water. Then add the contents of the 50 lb. (22.67 kg) SikaTile®-350 Flex 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®-350 Flex Set Mortar.
APPLICATION
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.
CLEANING OF TOOLS
Clean tools and tile with water before the material dries.
FAQ
Mortars are designed to perform in a in a wide range of environments and situations, and for a variety of tile types and sizes. Review product Technical Data Sheets or speak with Technical Services to find the right product solution.
Open time is important when installing large tile, gauged porcelain tile panels and slabs (GPTP/S) and membranes with a fleece to give proper transfer and coverage.
A118.4 is the minimum standard test that allows a mortar adhesive to bond to a porcelain tile. A118.11 is the minimum standard that allows for tile to be bonded directly over exterior-grade plywood in an interior application.
The word slake means to let rest with water. When mixing standard mortar or grout with water, manufacturers recommend letting the product rest before remixing to allow the polymers to wet out. This ensures that the product performs to spec. Our products with No-Slake technology are ready to apply after the initial mix.
No. Thinset is an adhesive, not a patching or leveling compound. Thinsets are
designed to be a certain thickness and when that thickness is greater than what the thinset can handle, shrinking will occur. Use a product that is designed for patching or leveling.