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Sika Sikasil 728 RCS Limestone 40oz Unit
Sikasil-728 RCS is a two-component self-leveling rapid-cure silicone in a Limestone 40 oz unit for horizontal highway and parking-deck joints. It opens to traffic in one hour and holds +100% / -50% movement.
- Open to traffic in one hour at 77 F
- ASTM C920 Class 100/50 with +100% / -50% movement
- Self-leveling ultra low modulus for horizontal joints
$76.91
Sikasil-728 RCS
Sikasil-728 RCS is a two-component, self-leveling, rapid-cure, ultra low modulus, neutral-cure silicone for horizontal highway and parking-deck joints that exceeds ASTM C920 Type M, Grade P, Class 100/50. This Limestone 40 oz unit (two 20 oz sausages, part 418017) skins in approximately 10 minutes, is tack-free in approximately 25 minutes at 77 F, and opens to traffic in one hour. Shore A lands at 4 to 6 with +100% / -50% movement and jet-fuel resistance.
Key Features
- Two-component self-leveling rapid-cure ultra low modulus silicone
- Exceeds ASTM C920 Type M, Grade P, Class 100/50
- Approximately 90% cure in 1 hour; open to traffic in one hour
- Skin time approximately 10 minutes; tack-free approximately 25 minutes at 77 F
- Shore A 4 to 6 with +100% / -50% movement capability
- Resists jet fuel and road salts on runway and highway joints
Applications
- Works on horizontal highway and bridge joints
- Parking decks, plaza decks, stadiums, and driveways
- Works on saw-cut joints for new and remedial pavement
- Airport runways and tarmacs needing rapid reopen
Technical Specifications
| Property | Value |
|---|---|
| Manufacturer | Sika |
| Product | Sikasil-728 RCS |
| Part no. | 418017 |
| Unit | 40 oz unit (two 20 oz sausages) |
| Color | Limestone |
| Chemistry | Two-part self-leveling neutral-cure silicone |
| Movement | +100% / -50% (ASTM C-719) |
| Shore A | 4 to 6 (7 days) |
| Tensile / elongation | Approximately 70 psi / >1,000% |
| Skin / tack-free | Approximately 10 min / 25 min at 77 F |
| Traffic open | 1 hour at 77 F |
Product documents: Sikasil-728 RCS Product Data Sheet (PDF)
Frequently Asked Questions
What traffic reopen time does Sikasil-728 RCS allow?
Approximately 90% cure in 1 hour at 77 F and 50% R.H., with open-to-traffic in one hour on the sheet.
What movement capability does Sikasil-728 RCS hold?
+100% extension / -50% compression under ASTM C-719, matching Class 100/50.
What joints suit Sikasil-728 RCS on the slab?
Horizontal expansion joints, highway and bridge joints, saw-cut joints, parking and plaza decks, airports, stadiums, and driveways.
What skin and tack-free times should crews plan for with Sikasil-728 RCS?
Skin time is approximately 10 minutes and tack-free time is approximately 25 minutes at 77 F and 50% R.H.
What hardness does cured Sikasil-728 RCS reach?
Shore A 4 to 6 after 7 days (Shore OO approximately 50), an ultra low modulus for extreme dynamic movement.
What size is the Sikasil-728 RCS unit on this page?
This page is the Limestone 40 oz unit (two 20 oz sausages), part 418017.
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