Dry-Set Cement Mortar
MULTISET 917 is the economical polymer modified dry-set mortar designed for the bonding of all types of tiles.
It may be used for either walls or floors for both interior and exterior applications where a liquid latex modified mortar is recommended. MULTISET 917 is a blend of Portland cement, sand and special dry latex additives that significantly improve bond strength and freeze-thaw stability – performance characteristics typically available only through the addition of liquid latex additives to dry-set mortar.
MULTISET 917 is used as a bond coat for setting high lug, absorptive, semi-vitreous and vitreous ceramic tiles for service in residential and commercial use. It is used in a mortar bed from 3/32″ to 3/16″ (2.4 to 4.8 mm) after the tiles have been properly embedded. MULTISET 917 has excellent water and impact resistance, is water cleanable, non-flammable, good for exterior work and requires no soaking of tiles.
MULTISET 917 mortar is not affected by prolonged contact with water, but does not form a waterproof barrier.
MULTISET 917 provides a permanent installation with higher bond strength and lower material and labor costs than conventional Portland cement mortar beds.
AREAS OF USE
Suitable backings, when properly prepared, include plumb and true masonry, concrete, cementitious backer units, cured Portland cement mortar beds, brick, ceramic tile and marble. For interior dry areas only, it may be used over gypsum board (on vertical surfaces only).
When bonding glass tile or large format porcelain tile (13″ x 13″ or larger) use Porcelain Stone & Tile 948 with ThinSet 911 Portland cement mortar. MULTISET 917 must not be applied directly over wood, resilient or sheet good flooring, vinyl floor tile (VCT or VAT), asphalt sheeting, vinyl covered wall board, Masonite®, cement asbestos board, metal, glass, plastic, luan plywood or gypsum mortar beds. Improperly cured or wet plywood, particle board or strip wood surfaces are not considered suitable substrates.
When used to install tile in an area that will be continually wet (e.g. swimming pools, gang showers, etc.) it is recommended that the complete installation shall be cured a minimum of 14 days and allowed to thoroughly dry before exposure to water.
Apply in a temperature range of 40°F to 90°F (4°C to 32°C). Do not allow mortar to freeze for the first 72 hours.
Some green or red marbles may warp when installed with setting materials containing water, causing loss of bond and/or damage to the finish. These marbles must be set with COLORSET EPOXY 931.
MULTISET 917 is designed for thin-set applications and is not recommended for use as a medium-bed mortar.
Use Full Contact 907 medium-bed latex Portland cement mortar.
MULTISET 917 is not recommended for use over ProRed 963.
Conforms to requirements for dry-set mortars found in ANSI A118.1, ANSI A118.4, ANSI A108.5 and CTI64-1.
Color – White or Gray.
Texture – Powder, consisting of Portland cement, graded sand, organic and inorganic chemicals.
50 lb. (22.7 kg) bags.
All surfaces on which tiles are to be set must be dry, structurally sound and not subject to temperatures below 40°F (4°C) or above 100°F (38°C) during installation. Detailed installation procedures may be found in the TCA Handbook and ANSI A108.5.
Surfaces must be dry and free of all grease, oil, dirt, dust, curing compounds, sealers, coatings, efflorescence, old adhesive residues, gypsum based underpayments and any other foreign matter.
Cleaning may be accomplished via mechanical sanding, scraping or chipping. Surfaces may be cleaned with muriatic acid if thoroughly flushed and neutralized. (Use proper precautions.) Smooth, steel troweled concrete surfaces must be roughened to ensure a good bond. It is advisable to dampen dry porous concrete before installing ceramic tile with MULTISET mortar. Do not leave puddles or standing water on surfaces.
Surfaces such as strip wood and old plaster or painted surfaces that provide bonding problems should be covered with a 3/8″ to 3/4″ (9.5 to 19 mm) reinforced mortar bed for walls and a 11⁄4″ (32 mm) reinforced mortar bed for floors. After a minimum of 20 hours, the dry-set mortar may be applied to the mortar bed.
CERAMIC TILE SUBSTRATES
It is absolutely essential that the existing tile be well bonded. The surface must be prepared in accordance with the requirements for cementitious surfaces. It is also necessary to abrade the surface to assure proper bonding.
Expansion joints shall be installed in accordance with local building codes. See EJ171 in TCA Handbook for detailed specifications. Expansion joints, control joints and cold joints shall never be bridged with setting material.
MULTISET 917 dry powder should be added to clean, potable water only at the rate of approximately 11⁄2 gallons (5.7 L) per 50 lb. (22.7 kg) bag. Mix thoroughly until smooth and let mortar slake for 15 minutes, then remix. If a mechanical mixer is used, it must be mixed at a low RPM (300 or less) so as not to entrap air in the mortar.
Do not add water or additional powder after slaking period.
The proper mortar consistency is such that when applied with a notch trowel to the substrate, the ridges formed in the mortar will not flow or slump.
Do not use mortar after initial set in bucket. During use, remix mortar occasionally.
Spread mortar with flat side of trowel to key into substrate; then, apply additional mortar to a depth sufficient to be notch with a suitable trowel that will leave only enough mortar to give 100% contact with back of tile and a subsequent mortar bed of 3/32″ to 3/16″ (2.4 to 5 mm).
With high lug tiles, “back buttering” may be required to ensure 100% coverage to back of tiles. During the setting of tile, it is advisable to occasionally remove a tile to be sure mortar has not skinned over and sufficient transfer is being made. It is also required that tiles be embedded to obtain good transfer of mortar to tile and for proper alignment.
Do not adjust tiles in mortar after they have been set past 20 minutes.
NOTE: As a practical test, it is recommended that 3 or more separate 12″ square (.3 m2) areas of tile be bonded to the properly prepared surface with the actual tile and bonding material that will be used on
the finished installation. These should be allowed to cure for 3 to 7 days and then removed with a hammer and chisel. At this point, one can determine if adequate bond has been obtained or if a problem exists.
Water is all that is needed to remove uncured mortar.
CURING AND GROUTING
A minimum cure is obtained in 12-24 hours, depending on ambient temperatures.
Grouting can be done before the mortar takes its final set if caution is used not to break the plastic mortar bond to the tile. Normal grouting should be done 48 hours later.
The recommendations, suggestions, statements and technical data are based on the best knowledge available to C-Cure and are given for informational purposes ONLY and without any responsibility for their use.
C-Cure MAKES NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE WITH RESPECT TO THE PRODUCT SOLD HEREIN except that the quality
of the ingredients shall be in accordance with C-Cure specifications. It is expressly understood and agreed that the buyer’s sole and exclusive remedy shall be replacement of defective products and under no circumstances shall C-Cure be liable for incidental or consequential damages.
C-Cure neither assumes nor authorizes any others to assume for it any liability with respect to furnishing of the product.
Handling and use of the product are beyond the control of C-Cure, therefore, no warranty is made, expressed or implied, as to the results obtained from the use of the product or against any claims for infringement of patents resulting from the use of the product.
This writing constitutes a complete and exclusive statement of the understanding between C-Cure and buyer.
There were no oral agreements or warranties, expressed or implied, collateral to or affecting the furnishing of the product. This understanding shall not be modified except in writing by an officer of C-Cure.
MULTISET 917 TECHNICAL DATA
|* A. Open Time @ 70°F (21°C)||
|* B. Adjustability @ 70°F (21°C)||
12 – 15 Minutes
|* C. Bucket Life @ 70°F (21°C)||
|D. Compressive Strength
>3200 psi (225 kg/cm2)
|* E. Shear Bond ANSI A118.1
Non-Vitreous Tile ———————–7 Days
|>300 psi (21 kg/cm2)
>300 psi (21 kg/cm2)
|>375 psi (26 kg/cm2)
>475 psi (33 kg/cm2)
|Vitreous (Paver) Tile ——————–7 Days
|>100 psi (7 kg/cm2)
>150 psi (11 kg/cm2)
|>175 psi (12 kg/cm2)
>275 psi (19 kg/cm2)
|*F. Safety – CAUTION: May cause eye, skin or lung injury.
Contains free silica. Prolonged exposure to dust may cause delayed lung disease (silicosis). Eliminate exposure to dust.
Use NIOSH approved mask for Silica dust. Contains Portland cement. If any cement or cement mixtures get into eye, flush immediately and repeatedly with water, and consult a physician promptly.
Freshly mixed cement, mortar, concrete or grout may cause skin injury.
Avoid contact with skin where possible and wash exposed skin areas promptly with water.
|G. Storage Life – One year if kept dry in sealed bag.|
|KEEP OUT OF REACH OF CHILDREN|
*These values reflect the results of practical testing methods closely associated with applications in the field.
Members of National Tile Contractors Association,
Materials & Methods Standards Association, Ceramic Tile Distributors Association.
NOTICE: The information in this bulletin is presented in good faith, but no warranty, express or implied, is given nor is freedom from any patent. In as much as any assistance furnished by C-Cure with reference to the safe use and disposal of its products is provided without charge, C-Cure assumes no obligation or liability therefore, except to the extent that any such assistance shall be given in good faith.
Grouts and Caulking Links
Misc Setting Material Links
C-Cure MultiSet 917 – C-Cure Thinset 911 – C-Cure Thinset 910 – C-Cure Pro Full Contact 907 – Pro-Set Thinset – PermaBond FastSet 904 – PermaBond Ultra Mastic 1002 – Dry-Set Mortars Coverage – Non Shrink Grout