BOSTIK PRODUCT SPECIFICATIONS MARCH 2009
Bostik, Inc., 211 Boston Street, Middleton, Massachusetts 01949
TEL: 888-592-8558; FAX: 978-750-7212; WEBSITE: www.bostik-us.com
SECTION 09305.31
ACRYLIC LATEX ADMIXTURE
***** This product guide specification can be used to specify Hydroment 425 Multi-Purpose Acrylic Latex Admixture, a high solids, acrylic emulsion designed to improve the performance of grouts and thin-set mortars. Hydroment 425 Multi-Purpose Acrylic Latex Admixture may also be used to prepare a bond coat, and to improve durability and moisture resistance of mortar beds. Refer to Bostik product literature for recommended admixture uses and application instructions.
Since Hydroment 425 Multi-Purpose Acrylic Latex Admixture is not used alone but in conjunction with other tile setting materials such as mortars and sand and cement grouts, it is unlikely that a separate specification would be prepared for this admixture. Instead the description and requirements stated in this guide would be incorporated into a broader scope section such as SECTION 09300 - TILE. The various paragraphs will need to be inserted in the appropriate locations in either Part 1, 2, or 3 of that section. This guide can also be combined with other guides to develop SECTION 09305 - TILE SETTING MATERIALS AND ACCESSORIES. *****
PART 1 - GENERAL
1.1 SUMMARY
A. Section includes: Acrylic latex admixture [to be added to [thin-set mortar] [grout] to improve performance characteristics.] [to be used to prepare bond coats and mortar beds.]
1.2 REFERENCES
A. ANSI A108.1A- Ceramic Tile installed in a wet set method with Portland Cement Mortar
B. ANSI A118.4 - Latex Portland Cement Mortar.
C. ANSI A118.6-1992 - Standard Cement Grouts for Tile Installation.
D. ANSI A118.7 - Polymer Modified Cement Grouts for Tile Installation.
E. ANSI A118.11 - (Exterior Glue Plywood) Latex-Portland Cement Mortar.
1.3 SUBMITTALS
A. Provide in accordance with Section 01330 - Submittal Procedures: Product data and installation instructions.
B. Sustainable Design Submittals:
1. Low-Emitting Materials: Certify volatile organic compound (VOC) content.
1.4 PRODUCT HANDLING
A. Ensure that admixture does not freeze during delivery, storage, and application.
______
ACRYLIC LATEX ADMIXTURE 09305.31 - 3
BOSTIK PRODUCT SPECIFICATIONS MARCH 2009
Bostik, Inc., 211 Boston Street, Middleton, Massachusetts 01949
TEL: 888-592-8558; FAX: 978-750-7212; WEBSITE: www.bostik-us.com
PARTS 2 - PRODUCTS
2.1 ACCEPTABLE MANUFACTURERS
A. Bostik , Inc., 211 Boston Street, Middleton, Massachusetts 01949; 800-523-6530; www.bostik-us.com.
B. Manufacturers of equivalent products submitted and approved in accordance with Section 01630 - Product Substitution Procedures.
2.2 PRODUCTS
A. Acrylic latex admixture:
1. Type: Multi-purpose, acrylic latex that can be used to prepare bond coats and mortar beds and can be added to thin-set mortars and cement grouts to improve performance characteristics; Hydroment 425 Multi-Purpose Acrylic Latex Admixture as manufactured by Bostik , Inc.
***** Include the following paragraphs if Hydroment 425 Multi-Purpose Acrylic Latex Admixture is used to enhance the physical properties of Hydroment Tile-Mate thin-set mortars. *****
2. When admixture is added to Hydroment Tile-Mate thin-set Portland cement mortar, enhanced properties shall be not less than:
a. Open time at 70 degrees F: 90 minutes minimum.
b. Adjustability time: 30 minutes.
c. 7 days shear strength:
1) Ceramic mosaic tile: 400 PSI.
2) Glazed wall tile: 400 PSI.
3) Quarry tile to wood: Exceeds 350 PSI wood failure.
d. Portland cement thin-set mortars enhanced with admixture shall exceed requirements of ANSI A118.4 and ANSI A118.11.
***** Hydroment Tile-Mate with Hydroment 425 Multi-Purpose Acrylic Latex Admixture can withstand substrate deflections of L/360 except for setting natural stone tile where deflections may be limited to L/720. Contact Bostik, Inc for stone tile setting recommendations. *****
e. Substrate deflection capabilities:
1) Natural stone tile: L/720 maximum.
2) Other tile: L/360 maximum.
3. Maximum volatile organic compound (VOC) content: [65] [__] grams per liter.
***** Include the following paragraphs if Hydroment 425 Multi-Purpose Acrylic Latex Admixture is used to enhance the physical properties of Hydroment Ceramic Tile Grout and Hydroment Dry Tile Grout ceramic tile grouts. *****
3. When admixture is added to Hydroment Portland cement ceramic tile grouts enhanced properties shall be not less than:
a. 7 days compressive strength: 4,000 PSI.
b. Initial set at 70 degrees F: 60 minutes.
c. Water absorption at 50 percent humidity: 3 percent.
d. Water absorption from immersion: 4 percent.
e. Portland cement ceramic tile grouts enhanced with admixture shall exceed requirements of ANSI A118.6-1992 and ANSI A118.7.
______
ACRYLIC LATEX ADMIXTURE 09305.31 - 3
BOSTIK PRODUCT SPECIFICATIONS MARCH 2009
Bostik, Inc., 211 Boston Street, Middleton, Massachusetts 01949
TEL: 888-592-8558; FAX: 978-750-7212; WEBSITE: www.bostik-us.com
PART 3 - EXECUTION
3.1 APPLICATION
***** Hydroment 425 Multi-Purpose Acrylic Latex Admixture has multiple uses as mortar and grout admixture and to prepare a bond coats and mortar beds. However, this admixture should not be used with latex and polymer modified mortars such as Hydroment Single Flex, Hydroment PM, and Hydroment ReFlex. Contact Bostik or refer to product literature for determining appropriate applications and limitations. *****
A. Mix and use acrylic latex admixture in accordance with manufacturer's recommendations and installation instructions.
***** If acrylic latex admixture is used to enhance mortar beds, thin-set mortars, or grouts, edit the following paragraph to reflect the specific application. Refer to Bostik product literature for recommended proportions of admixture. *****
B. Mixing: Mix [_____] quarts of acrylic latex admixture to [50 pounds] [_____] of [thin-set mortar] [mortar bed mix] [Portland cement grout] with slow speed mixer at 150 RPM maximum. Allow mixture to stand 15 minutes and re-mix. Do not re-temper by adding more liquid.
***** If acrylic latex admixture is used to prepare a bond or skim coat, edit the following paragraph to reflect the specific application. Refer to Bostik product literature for recommended proportions of admixture. *****
C. Bond coat: Mix [_____] quarts of acrylic latex admixture to [50 pounds] [_____] of Portland cement to prepare bond coat with slow speed mixer at 150 RPM maximum or in a mortar box. Do not re-temper by adding more liquid.
END OF SECTION
______
ACRYLIC LATEX ADMIXTURE 09305.31 - 3