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Prime Resins Prime Flex 985 1:1 Cartridge
Prime Flex 985 5.0 is a two-component, high-density structural polyurethane foam in a 1:1 Quick Mix cartridge for filling voids and undersealing concrete slabs. The closed-cell foam bonds with soil and concrete and reaches 85% of strength in 20 minutes.
- Closed-cell foam bonds with soil and concrete under slabs
- Cream in 60 seconds at 73 F, tack-free in 3 minutes
- Underseals slabs, pipes, manholes, and roadways
$54.12
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Prime Flex 985 5.0
Prime Flex 985 5.0 is a two-component, high-density structural polyurethane foam in a 1:1 Quick Mix cartridge for filling voids and undersealing concrete slabs. The closed-cell foam bonds with soil and concrete and is hydro-insensitive. Cream time is 60 seconds at 73 F, tack-free is 3 minutes, and 85% of strength is in 20 minutes. Typical work includes slabs, pipes, manholes, and roadways.
Key Features
- Two-component structural polyurethane foam is used to fill voids
- Closed-cell foam bonds with soil and concrete
- Cream time is 60 seconds at 73 F
- Tack-free time is 3 minutes, and 85% of strength is in 20 minutes
- Hydro-insensitive foam is used around wet soils and slabs
Applications
- Undersealing and stabilizing concrete slabs
- Voids behind pipes, walls, and manholes
- Roadway void fill where a high-density foam is specified
Technical Specifications
| Property | Value |
|---|---|
| Chemistry | Two-component structural PU foam |
| Cartridge | 1:1 Quick Mix, 300 ml x 300 ml |
| Ratio | A:B 1:1 by volume |
| Viscosity | 800 to 1,000 cP at 73 F |
| Solids | 100% |
| Density | 5 lb/cu ft |
| Expansion | 12x |
| Compressive | 100 psi, ASTM D1621 |
| Cream / tack-free | 60 sec / 3 min at 73 F |
| Shelf life | 12 months unopened |
Product documents: Prime Flex 985 5.0 Data Sheet (PDF)
Frequently Asked Questions
What voids is Prime Flex 985 5.0 used on?
Voids under and around concrete slabs, pipes, manholes, and roadways. The two-component high-density foam underseals slabs and fills space behind pipes and walls. It is hydro-insensitive and bonds with soil and concrete.
What cartridge is Prime Flex 985 5.0 on this page?
A 1:1 Quick Mix cartridge, 300 ml x 300 ml. Ratio is A:B 1:1 by volume. The datasheet ships these cartridges in a case of 10; this page is the cartridge.
What set times does Prime Flex 985 5.0 have?
Cream time is 60 seconds at 73 F. Tack-free time is 3 minutes. 85% of full strength is in 20 minutes. Cold slows the reaction and raises viscosity. Precondition to 70 F to 80 F.
What strength does Prime Flex 985 5.0 reach?
Compressive strength is 100 psi by ASTM D1621. Density is 5 lb per cubic foot. Expansion is 12x with no shrinkage by ASTM D1042 / D756. Solids are 100%.
What viscosity does Prime Flex 985 5.0 have?
800 to 1,000 centipoise at 73 F. That is a moderate viscosity for structural void fill, not a super-low leak grout. pH below 3 or above 10 may hurt foam properties.
What shelf life does Prime Flex 985 5.0 have?
12 months from manufacture in unopened containers stored dry between 40 F and 80 F. Protect the cartridge from moisture.
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