Series 490
LavaCrete
Generic Type
Novolac Vinyl Ester Polymer Concrete
Common Usage
Series 490 is a durable polymer concrete which exhibits fast curing and minimal shrinkage. Ideal for the rehabilitation of severely eroded concrete or for the corrosion-proofing of new concrete where superior chemical resistance is required throughout the complete topping system. Series 490 has enhanced solvent and temperature resistance over standard vinyl ester materials. Series 490 is ideal for pump and pad rebuilds in areas of strong acid and caustic exposure. Use to cast sumps and trenches off-site for time and labor savings.
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Primers
Series 1407. Note: For services above 180°F (82°C), do not use a primer.
Finish
Flat (as poured). Note: A semi-gloss finish can be achieved by troweling the surface.
Recommended DFT
3/8" to 10" (1.0 to 25 cm) in a single pour.
Theoretical Coverage
Coverage rates based on Casting/Topping Application:
110 sq ft (10.2 m²) at 3/8" per large kit (LK)
83 sq ft (7.7 m²) at 1/2" per large kit (LK)
41 sq ft (3.8 m²) at 1" per large kit (LK)
See APPLICATION for additional coverage rates.
Curing Time
| Temperature | Light Traffic/To Handle | Return to Service | Maximum Chemical Resistance |
|---|---|---|---|
| 90°F (32°C) | 1-2 hours | 12-24 hours | 24 hours |
| 75°F (24°C) | 2-4 hours | 24 hours | 24 hours |
| 50°F (10°C) | 8-10 hours | 48 hours | 72 hours |
Curing times are based upon 3/8-inch of material, thicker castings and pours may result in longer set times. Note: Certain immersion service times may require additional cure time, contact Tnemec Technical Services for additional information.
Volatile Organic Compounds
0.63 lbs/gallon (76 grams/litre)
Volume Solids
100% (mixed). Series 490 contains a reactive monomer and some loss will occur during application and cure.
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