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POURTHANE® SL
Self-Leveling Joint Sealant
DESCRIPTION
POURTHANE SL is a single-component, self-leveling, premium-grade polyurethane sealant with an accelerated curing capacity.
USES
POURTHANE SL is used to seal horizontal expansion joints in concrete and cementitious slabs, such as sidewalks, balconies, pavement, terraces, warehouses, factories, civil structures, plazas, and pitch pans.
FEATURES/BENEFITS
- One-component, no mixing.
- Self-leveling, pourable.
- Accelerated curing.
- Permanently elastic.
- High durability.
- Resists aging and weathering.
- Excellent adhesion.
- Convenient, easy-to-use packaging.
PACKAGING
29 Oz. (825 mL) Cartridges
5 Gal. (18.93 L) Pails
55 Gal. (208.20 L) Drums
SHELF LIFE
When stored indoors and in original, unopened containers at temperatures between 40 – 90° F (4 – 32° C), shelf life is a minimum of one year from date of manufacture.
SPECIFICATIONS
- ASTM C 920, Type S, Grade P, Class 25, Use T, NT, M, O, G, I
- Federal Specification TT-S-00230C, Type I, Class A
TECHNICAL DATA
| Appearance | Pasty |
| Color | Various |
| Viscosity @ 74° F (23° C) | Brookfield RVT / spindle 6 / 5 rpm : ca. 15,000 mPa.s |
| Density @ 68° F (20° C) | 1.14 ± 0.05 |
| Application Temperature | 41 – 95° F (5 – 35° C) |
| Skin Formation Time @ 74° F (23° C) and 50% HR | Ca. 50 min |
| Shore A Hardness (ASTM D 2240) 21 Day | 50 +/- 5 |
| Cure Time @ 74° F (23° C) and 50% HR | < 1/10″ (3 mm)/24 h |
| Temperature Resistance | -40 – 194° F (-40 – 90° C) |
| Resistance to Dilute Acids and Bases | Average |
| UV Resistance | Good |
| Water and Salt Spray Résistance | Excellent |
| Compatibility w/Paints | Water-Based: Yes Solvent-Based: Test beforehand |
| Modulus @ Break ASTM D412 | >0.6 MPA |
| Elongation @ Break ASTM D412 | >600% |
APPLICATION
Surface Preparation … Clean all surfaces. Joint walls must be sound, clean, dry, frost-free, and free of all oil and grease. Curing compound residues and any other foreign matter must be thoroughly removed. Install bond breaker tape or CERA-ROD™ or KOOL-ROD™ from W. R. MEADOWS to prevent bond at base of joint.
Priming … Priming is not usually necessary. Substrates only require priming if testing indicters a need or where sealant will be subjected to water immersion after cure.
Application Method … Condition material to 65˚ – 75˚ F (18˚ – 24˚ C) before using. Sealant should be installed when joint is at mid-range of anticipated movement. Pour sealant into joint slot in one direction and allow sealant to flow and level out as necessary. Tool as required; minimum tooling is necessary. Joint dimensions should allow for ¼” minimum and ½” maximum thickness for sealant. Proper design is 2:1 width-to-depth ratio. Always use bond breaker tape or closed cell backer rod for support on horizontal joints.
Cleanup … Application tools can be cleaned with toluene or xylene before curing. Afterwards, mechanical cleaning will be required.
PRECAUTIONS
Allow one-week cure at standard conditions when used in total water immersion applications. Maximum exposure level of chlorine is 5 ppm. Do not cure in presence of curing silicone sealants. Avoid contact with alcohol and other solvent cleaners during cure. Do not apply when moisture vapor transmission condition exists from the substrate.
LEED INFORMATION
May help contribute to LEED credits:
- IEQ Credit 4.1: Low Emitting Materials: Adhesives & Sealants
- MR Credit 2: Construction Waste Management
- MR Credit 5: Regional Materials
COVERAGE
This chart shows the approximate number of lineal feet that can be sealed per gallon. One gallon is approximately four cartridges.
This material last updated December 2012.
Find the W. R. MEADOWS location nearest you.