SECTION 03 37 00

MEMBRANE FORMING CURING COMPOUND

Specifier notes: The purpose of this Specification is to assist the specifier in developing a specification for the use of a curing compound or a multi-function curing and sealing compound. Generally, curing compounds are included as a part of the materials in section 03 30 00. This specification can be used as a stand-alone specification or integrated into the more encompassing Section 03 30 00, Cast in place Concrete.

L&M CURE R is a water-borne, dissipating resin curing system to be used in general conditions and where compatibility with subsequent toppings must be assured. DRESS & SEAL is multi-function acrylic curing and sealing material, available in low or high solid contents, solvent carried or water-borne formulations. LUMISEAL PLUS is a non-yellowing acrylic curing and sealing that conforms to ASTM C1315 Class A and is recommended for exposed aggregate, stained and stamped concrete. LUMISEAL is also available in both high and low solids, and solvent carried and water-borne formulas.

All products comply with current national VOC regulations, but some state and local regulations are more restrictive regarding curing and sealing compounds and should be referred to.

PART 1 - GENERAL

1.01 SUMMARY

A. This Section includes membrane forming curing compounds for new construction.

1.02 RELATED SECTIONS

A. 02 55 00 - Concrete Paving
B. 03 30 00 - Cast-in-Place Concrete
C. 03 60 00 - Non-Shrink Grout

1.03 REFERENCES

A. American Society for Testing Materials
1. ASTM C 309 Standard Specification for Membrane Forming Curing Compounds
2. ASTM C 1315 Standard Specification for Liquid Membrane-Forming Compounds, having Special Properties for Curing and Sealing Concrete

PART 2 - PRODUCTS

2.01 MANUFACTURERS

A. Laticrete International, Inc.; 1 LATICRETE Park North, Bethany, CT 06524
Toll Free Technical Assistance Line: 800-362-3331; website, www.lmcc.com

2.02 MATERIALS

A. Dissipating resin-based, membrane forming curing compound. Material will Degrade when exposed to ultraviolet light and abrasion, but care must be taken to completely remove the film mechanically prior to application of subsequent toppings or coatings. Complies with all local and state air quality regulations. Complies with ASTM C309, Type 1.
A1. L&M CURE R
B. Acrylic cure-sealer-dustproofer. First coat as a curing compound; second coat to be used as sealer coat. Shall comply with local VOC requirements and ASTM C1315 Type 1, Class B (minimal yellowing).
B1. DRESS & SEAL
[Specifier note: Use DRESS & SEAL WB (ASTM C 309) or DRESS & SEAL WB 30(ASTM C 1315) when air quality regulations require a water-based, low odor material]
C. Non-yellowing acrylic cure-sealer-dustproofer. Conforms to ASTM C1315 Type 1, Class A. (Non-yellowing). Second coat to be used as sealer coat.
C1. LUMISEAL PLUS
[Specifier note: Use LUMISEAL WB (ASTM C 309) or LUMISEAL WB PLUS (ASTM C 1315) when air quality regulations require a water- based, low odor material.]
D. Exterior Concrete pavement curing: White pigmented, membrane forming curing compound. Complies with all local and state air quality regulations and with ASTM C 309, Type 2
D1. L&M CURE W2

PART 3 - EXECUTION

3.1 APPLICATION

A. Apply specified membrane forming curing compound to concrete after final finishing operations and concrete surface glaze has disappeared.
B. Concrete shall be protected from premature or excessive drying temperature extremes and damage immediately following finishing. Minimal moisture loss at relatively constant temperature shall be maintained.
C. Curing shall be maintained for a minimum of seven (7) days or until seventy (70) percent of the specified concrete strength has been obtained.
D. During curing period, concrete shall be protected from damage by equipment, temperature change, stored materials, jobsite activities, rain, and running water.

Specifier Note: In areas where a subsequent topping is scheduled, such as SEAL HARD, we recommend wet curing the concrete or covering the concrete with waterproof paper or fabric. It is acceptable under certain conditions to apply a membrane, resin based cure such as L&M CURE R only at a higher application rate of 400-450 square feet per gallon (10-12.5 square meters per liter) to minimize removal costs, but care must be taken to insure complete removal of the curing compound. Contact the L&M Technical department for details.

3.2 FIELD QUALITY CONTROL

A. Examine the curing compound work to determine if the concrete is suitably protected by the material.

END OF SECTION - 03 37 00