Product Data Sheet
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HYDRALASTIC 836 SL
Cold-Applied, Moisture Cured, Waterproofing Membrane
HYDRALASTIC 836 SL is a single-component, cold-applied, solvent-free, water-activated, waterproofing system. The product is designed for horizontal and vertical surfaces. It does not shrink, has a low volatile organic compound (VOC) content. It will not crack in extreme cold or flow due to softening at high temperatures.
HYDRALASTIC 836 SL is suitable for use on interior or exterior concrete surfaces, where protection from water intrusion is desired. The product can be used for both above-grade and below-grade applications. HYDRALASTIC 836 SL is excellent for horizontal and vertical applications, such as waterproofing plaza decks and elevated composite decks and also in between-slab (split-slab) applications.
- Fast curing at 75o F (23o C); no dust pick-up.
- Save time and labor; easy self-leveling application.
- Decreased blistering.
- May be applied to green concrete
- Fast cure; reduces labor.
- Cured with water addition in as little as two hours/Can be recoated same day for two-coat application.
- Will not harm EPS or Styrofoam materials.
- Does not freeze; will not be damaged due to freezing weather conditions.
- Cures to a tough, flexible membrane.
- Easy to mix; add up to one quart (0.95 L) water per five gal. (18.9 L)
5 Gal. (18.93 L) Pails.
Approximate coverage per gallon (3.78 L):
|26 ft.2 (2.4 m2)||60 mils (dry)|
|17.5 ft.2 (1.6 m2)||90 mils (dry)|
|13 ft.2 (1.2 m2)||120 mils (dry)|
When stored indoors in original, unopened containers at temperatures between 40° – 70° F (4° – 21° C), optimum performance and best use is obtained within one year of date of manufacture.
- ASTM C836
- Complies with all current federal, state, and local maximum allowable VOC requirements, including National EPA VOC Emission Standard for Architectural Coatings, Arizona Maricopa County, CARB, LADCO, OTC Phase I and II, SCAQMD, and Utah Department of Air Quality.
|PROPERTY||TYPICAL TEST VALUE||TEST METHOD|
|Solids Content by Weight, %:||96 ± 3||ASTM C2369|
|Initial Viscosity||2,000 ± 1000 cps|
|Viscosity after 20 mins mixed with potable water.||20,000 ± 1000 cps|
|Working Time with addition of potable water||20 minutes at 75° F (23.9° C) and 50% RH|
|Initial Cure with the addition of 1 quart of potable water to 5 gal. HYDRALASTIC 836 SL||2 Hours at 75° F (23.9° C) and 50% RH|
|Tensile Strength, psi:||350 ± 50 psi||ASTM D412|
|Elongation at Break, %:||500 ± 50 %||ASTM D412|
|Permeability, perm in.:||0.1||ASTM E96 BW|
|Shore 00 Hardness:||>76||ASTM D2240|
|Service Temperature, ° F (° C):||-40° – 200° (-40° – 70°)|
|Minimum Application Temperature, ° F (° C):||Above 30° (-1°)|
|VOC Content, g/L:||47||ASTM D2369|
New Concrete … For best results, all new concrete surfaces should be given a light trowel finish or screed to provide a flat, uniform surface. The surface should then be finished with a light broom profile. Wet curing is recommended. All membrane curing compounds must be mechanically removed. New concrete should be power washed or blown clean with oil-free compressed air before coating application to ensure removal any dirt build or contaminates that may interfere with bond of primer or HYDRALASTIC 836 SL.
Surface Preparation … HYDRALASTIC 836 SL is intended for concrete, metal, and wood surfaces. For existing concrete remedial work or new concrete lacking profile, lightly roughen or rough grind substrate. Concrete surfaces require a medium sandpaper finish equal to or greater than ICRI CSP #3. Surface preparation may be completed by shot blasting. Install a 100 – 200 ft.2 (9.30 – 18.58 m2) mockup of the system to be installed and approved for actual coverage rates and functionality before proceeding.
The concrete must be structural sound and free of all contaminates, including oil, grease, dust, laitance and other bond-breaking materials. Mechanically abrade the concrete surface by grinding, abrasive blasting, or shot blasting to ICRI Guideline No. 310.2R, CSP 3 – 5.
All surfaces must be thoroughly dry, not damp, and have no standing water to ensure proper performance of the HYDRALASTIC 836 SL system.
For metal surfaces, remove all oils or other contaminates on the surface prior to application of HYDRALASTIC 836 SL. Mechanically abrade and solvent wipe to remove any contaminates. Allow the solvent to evaporate completely prior to application of HYDRALASTIC 836 SL.
Joints, Cracks, and Flashing … Apply a stripe coat of HYDRALASTIC 836 SL over all cracks up to 1/16″ (1.58 mm) width. All cracks over 1/16″ (1.58 mm) width must be caulked.
Priming … For porous substrates and where air and/or moisture release may cause pinhole or blister problems to occur in the applied membrane, priming the substrate prior to application of HYDRALASTIC 836 SL is recommended. Discovery of these issues is generally revealed in the mockup. For priming recommendations and installation, refer to the Priming Installation guideline.
Decrease Blistering … This is a water-activated waterproofing compound, as such water is required for proper curing. The waterproofing membrane should be properly mixed with water to achieve optimal performance. Add up to one quart (0.95 L) of potable water per five gal. (18.9 L) pail of HYDRALASTIC 836 SL. It is required to add at least one pint (0.47 L) of potable water to increase cure and decrease the probability of blistering occurring. Also, applying HYDRALASTIC 836 SL in the cooling part of the day or not in direct sunlight will decrease probability of blistering due to outgassing from the concrete. Do not apply when the surface temperature of the substrate is greater than 110° F (43° C).
Mixing …. Mix ratio: 20 parts HYDRALASTIC 836 SL to one part water by volume. HYDRALASTIC 836 should be thoroughly mixed before adding water. Add up to one quart (0.95 L) of water to five gallons (18.9 L) of HYDRALASTIC 836 SL and mix thoroughly for three minutes using a mechanical mixer at slow speed to ensure a homogeneous material. Use a mixing blade designed for paints or coatings, not a mud or mortar mixer. Take care not to allow entrapment of air into the material.
Application Method … Make sure product is conditioned at 75° F (23.9° C) by storing product overnight or at least 12 hours prior to use for ease of application.
Apply evenly by trowel, squeegee, or roller. A flat-blade squeegee is suggested for best results. Notched rubber squeegees waste material and do not provide a uniform coat. Flat-blade squeegees provide a uniform mil thickness. HYDRALASTIC 836 SL can also be applied horizontally with a squeegee or roller. Cure time will vary depending on temperature and humidity. Attention to proper slope to drain is essential for proper waterproofing. HYDRALASTIC 836 SL has a work life of 20 minutes at 75° F (23.9° C) with the addition of potable water. Make sure all spreading and finishing of the product has been completed within this timeframe.
In critical waterproofing applications such as plaza decks, podiums, or other similar horizontal waterproofing applications, a 120-mil layer of HYDRALASTIC 836 SL embedded with REINFORCING FABRIC HCR from W. R. MEADOWS is recommended. For all horizontal installations, refer to High Build Reinforced System installation guidelines for proper installation guidelines. If there are no details available for your specific application, please contact a W. R. MEADOWS representative for recommendations.
If a second coat is necessary, apply as soon as first coat has set sufficiently to support subsequent coat. At 75° F (23.9° C) and 50% relative humidity, allow coating to cure a minimum of 2 – 4 hours before proceeding to subsequent coats, but no more than eight hours apart. As ambient, substrate, and material temperatures increase, an oily-like film may develop on the surface and act as a bond breaker. For next-day or second-coat applications, rub the tie-in area down [6″ – 8″ (152 – 203 mm wide)] with acetone, mineral spirits, or xylene. This removes the oil film. Do not use alcohol.
HYDRALASTIC 836 SL can be applied up to 15 mils in a single vertical application until the minimum 60 mils or project specified mil thickness requirement is achieved.
For next-day or second-coat applications, rub the tie-in area down [6″ – 8″ (152 – 203 mm wide)] with acetone, mineral spirits, or xylene. This removes the oil film. Do not use alcohol.
Protect the Membrane … Protect HYDRALASTIC 836 SL with MEL-DRAIN™ (type with the polymeric backing film) from W. R. MEADOWS or contact W. R. MEADOWS for additional protection course options. Application of protection should be done after material can be walked on without causing damage to the integrity of the membrane.
HYDRALASTIC 836 SL will not typically wash off if rain begins during or after application. Stop all work if rain begins and protect open or unused material from rainfall.
Cleanup … Uncured HYDRALASTIC 836 SL cleans up easily with acetone, mineral spirits, or xylene. Cured material is best removed by mechanical means.
Do not expose product to exterior UV for longer than 14 days. HYDRALASTIC 836 SL is not to be used as a liner in a water-containing structure and is not to be used as an exposed or wearing surface. For this purpose, use the GEMITE® line of products. HYDRALASTIC 836 SL is not compatible with asphalt, polymeric-based products, or asphaltic membranes. Do not use on surfaces that are later to be painted. It cannot withstand direct wear or abrasion. Containers that have been opened must be used as soon as possible. Do not dilute product with solvent under any circumstance. HYDRALASTIC 836 SL is not recommended for use over magnesite, gypsum, lightweight concrete, or where chained or studded tires may be used. Concrete must exhibit 3000 psi (20.7 MPa) minimum strength. Use denatured alcohol to remove all grime, oil, paint, frost, and other contamination from all working surfaces. Always install a mockup prior to full installations.
This data sheet provides a summary of the factors, precautions, limitations, and design theories that should be considered when designing a complete waterproofing and drainage system, but is not standalone or complete; project, environmental, and application specific requirements must be considered before drafting a guide specification, determining suitability, or application of material. Suitability of the HYDRALASTIC 836 SL is the sole responsibility of the licensed design professional or installing contractor.
Refer to safety data sheet for health and safety information. WARNING: This product contains isocyanates.
May help contribute to LEED credits:
- EAp2: Minimum Energy Performance
- EAc2: Optimize Energy Performance
- MRc9: Construction and Demolition Waste Management
- EQc2: Low-Emitting Materials [For Healthcare and Schools (exterior-applied products) ONLY]