Product Data Sheet
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Self-Leveling Joint Sealant
POURTHANE SL is an elastomeric, one-component, self-leveling, non-bubbling, premium-grade polyurethane sealant specifically developed to be used as a multi-purpose horizontal joint sealant. The product is a moisture cure sealant with excellent adhesive properties and resistance to aging and weathering.
POURTHANE SL is used to seal horizontal joints in concrete, such as sidewalks, balconies, pavement, terraces, warehouses, factories, civil structures, plazas, and runways. POURTHANE SL may also be used as a pitch pan sealant.
- One-component, no mixing.
- Non-bubbling formula can be applied in green or damp concrete.
- Movement capacity of +/-25%.
- Accelerated curing.
- Highly resistant to fuels, including jet fuel.
- Resistant to incidental exposure to ethanol.
- Permanently elastic.
- High durability.
- Resists aging and weathering.
- Excellent adhesion.
- Convenient, easy-to-use packaging.
- Low VOC content.
29 Oz. (825 mL) Cartridges (12/Carton)
5 Gal. (18.93 L) Pails
55 Gal. (208.20 L) Drums
Limestone, Gray, Desert Tan
This chart shows the approximate number of lineal feet that can be sealed per gallon. One gallon is approximately four cartridges.
|Joint Depth||Joint Width|
|5/8″ (15.9 mm)||3/4″ (19.1 mm)||7/8″ (22.2 mm)||1″
When estimating, figure 5 cartridges/gal. (2 cartridges/1.5 L).
Cubic inches/gal. – 231 (1000 cm3)
Cubic inches/cartridge – 50 (825 cm3)
For triangular cross-section joints:
1/4″ (6.35 mm) each side – 616 linear ft./gal. (49.6 m/L)
1/2″ (12.7 mm) each side – 154 linear ft./gal. (12.4 m/L)
3/4″ (19.1 mm) each side – 68 linear ft./gal. (5.5 m/L)
When stored indoors and in original, unopened containers at temperatures between 40° – 95° F (4° – 35° C), shelf life is one year from date of manufacture, except for pails and drums, which have a shelf life of six months.
- ASTM C 920-11, Type S, Grade P, Class 25, Use T1, T2, NT, M, G, A, I, O.
- Conforms to BS 5212 for determination of resistance to heat, aging, and fuel immersion.
- Federal Specification TTS-00230C, Type 1, Class A
- Approval/Standards Conform to 1S0 11600 F 25 HM
- USDA compliant for use in areas that handle meat and poultry
|Property||Typical Value||Test Method|
|Tensile strength, psi (MPa)||180
|Tear Strength, pli (kN/m)||33 lb./in.
|Shore A Hardness||30±5||ASTM C661|
|Movement Capability||±25||ASTM C719|
|Weathering Resistance||Excellent||ASTM C793|
|Stain and Color Change||Pass||ASTM C510|
|Application Temperature||41° – 104° F
(5° – 40° C)
|Service Range||-40° to 180° F
(-40° to 82.2° C)
|Rheological Properties||Pass||ASTM C639|
|Peel on Aluminum-Dry||25 c.f.||ASTM C794|
|Peel on Glass-Dry||26 c.f.||ASTM C794|
|24 c.f.||ASTM C794|
|Paint Compatibility||Water-Based: Compatible|
|Solvent-Based: Check Compatibility|
|VOC Content||47 g/L|
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 KOOL-ROD™ from W. R. MEADOWS to prevent bond at base of joint. When applying to green concrete, wait 24 hours after forms have been removed. Concrete can be damp during application, but do not apply when standing water is in or near joints.
Priming … Priming is not usually necessary. Substrates only require priming if testing indicates a need or where sealant will be subjected to water immersion after cure. If priming is required, use REZI-WELD™ LV from W. R. MEADOWS.
Application Method … Condition material to 65˚ – 75˚ F (18.3˚ – 23.9˚ C) before using. Sealant should be installed when joint is at mid-range of anticipated movement. Gun sealant into joint opening 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” (6.35 mm) minimum and ½” (12.7 mm) maximum thickness for sealant. Proper design is 2:1 width-to-depth ratio. Always use bond breaker tape or KOOL-ROD™ from W. R. MEADOWS for support on horizontal joints
Cleanup … Application tools can be cleaned with toluene or xylene before curing. Afterwards, mechanical cleaning will be required.
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. POURTHANE SL is not resistant to ethanol in fully submerged or continual soaked conditions. Maximum depth of POURTHANE SL should be ½” (12.7 mm). Do not use caulks, sand, or incompressibles as a bottom in a joint. Do not install when rain is expected before the product develops a substantial skin. Storing at elevated temperatures will reduce shelf life.