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TECHNICAL DATA SHEET | Section 6.9
PC-440SF
Solvent Free, Elastomeric,
Aromatic Polyurethane Base Membrane

Product Description
PC-440SF is a single component, high solids, low odor, solvent Technical Data (Based on Draw Down Film)
free, environmentally safe, liquid applied, moisture-cured,
aromatic polyurethane elastomeric waterproofing base
membrane. Coverage Rate 1 gal/100 sqft
0.41 l/sqm
Features
Dry Film Thickness per 16 ± 2 mils
• Moisture Cured Coat 406 ± 50 microns
• Seamless Waterproofing Membrane
• Solvent Free
Hardness, ASTM D2240 50 ± 5 Shore A

Typical Uses Tear Resistance, Die C, 220 ± 25 pli
ASTM D624 38.5 ± 4.4 kN/m
• Concrete
• Masonry Surfaces Tensile Strength, 400 ± 100 psi
• Metal ASTM D412 2.7 ± 0.7 MPa
• Plywood
• Wood
Ultimate Elongation, 525 ± 75%
ASTM D412
Packaging
Specific Gravity 1.34 ± 0.1
5-Gallon 5 gallon (18.9 liters) pail
Total Solids by Weight, 99.99%
55-Gallon 55 gallon drum, net fill 50 ASTM D2369
gallons (189 liters)
Total Solids by Volume, 99.99%
Color ASTM D2697
Grey, Tan, or custom color.
Not a stock item. Minimum order of 250 gallons (945 liters) Viscosity at 75°F (24°C) 6500 ± 2000 cps
is required. See color chart for special provisions. Contact
Polycoat Products for more information. Volatile Organic
Surface Preparation Compounds, <0.08 lb/gal
Refer to General Guidelines for complete information. ASTM D-2369-81 <10 gm/liters
Mixing
Before application, mix PC-440SF using a mechanical mixer at
slow speed. Mix PC-440SF thoroughly until a homogeneous
mixture and color is attained. Use care not to allow the adhesion between coats, it is imperative that re-coating be
entrapment of air into the mixture. Do not mix in an up and done within 48 hours.
down motion.
Curing
Application At 75°F (24°C) and 50% relative humidity, allow coating to cure
For best results, use a squeegee or notched trowel. A phenolic 16 hours before proceeding to subsequent coats. Cure time
resin core roller may be used but extra care should be taken will vary depending on temperature and humidity. If more
not to trap air which may result in bubbles. than 48 hours passes between coats, re-prime the surface
Requires a continuous coating application to minimize lines with Polyprime U before proceeding.
and/or streaking. If accelerated curing is required, add one quart of PC-50 in a 5
It is recommended to apply an aggregate of washed, dry, gallon pail of PC-440SF and mix thoroughly. This accelerated
rounded sand, approximately 16 or 20 mesh (0.84-1.19 mm), PC-440SF will cure in 6-8 hours at 75°F (24°C) and 50% relative
6.5+ Moh’s minimum hardness at a rate of 20 lbs/100 sqft (1 humidity. If PC-50 Accelerator is used then re-coat should be
kg/sqm) or as required to achieve a slip-resistant finish, into done within 12 hours after cure. If re-coat window has passed,
the wet second coat, covering it completely. Broadcast sand then solvent wipe the surface with VOC compliant solvent and
®
until refusal and when the coating is dry, remove extra loose re-prime surface with Polyprime U.
sand, preferably by vacuum. PC-440SF is very sensitive to heat and moisture. Higher
Most applications require two coats. To achieve proper temperatures and/or high humidity will accelerate the cure

POLYCOAT PRODUCTS TEL 562.802.8834 | FAX 562.921.7363 Section 6.9
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