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Adeka KM-String KM4MM 165' Case
Adeka Ultraseal KM-String KM4MM is a 4 mm hydrophilic rubber string for sheet-pile interlocks, CIPP, and cracks where a small-diameter fill is the right size.
- About 3/16 in for smaller interlocks and gaps
- Stretch and insert into the gap
- Can stop flowing water in an interlock
$362.95
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Adeka Ultraseal KM-String KM4MM Hydrophilic Waterstop
Adeka Ultraseal KM-String KM4MM is a hydrophilic vulcanized rubber string about 4 mm (3/16 in) for sheet-pile interlocks, cracks, CIPP, and irregular gaps. It swells about 3 times by volume, can be stretched and inserted, and can stop flowing water in an interlock. The 4 mm diameter is the small-gap choice in this family. A 6 mm string is available as the Adeka KM-String KM6MM.
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Key Features
- Sheet-pile interlocks on a small gap
- CIPP liner work where a string can be pulled in
- Cracks and irregular gaps that a strip cannot follow
- Stretch about 40% to get the string into the gap
- Can stop flowing water in an interlock
- About 3 times volume swell to fill the void
Applications
- Sheet-pile interlock leaks
- CIPP and liner work
- Crack filling
- Irregular gaps smaller than the 6 mm string
Technical Specifications
| Property | Value |
|---|---|
| Size | 4 mm (about 3/16 in) |
| Packaging | 165 ft per case |
| Volume change | 170% (about 3 times) |
| Linear expansion | About 1.45 |
| Hardness | A33 (representative) |
| Tensile strength | 6 MPa (representative) |
| Elongation | 800% (representative) |
| Vulcanization | Yes |
| Specific gravity | 1.18 (representative) |
| Hydrophilic agent | Urethane polymer |
Product documents: Adeka Ultraseal KM-String Technical Product Data Sheet (PDF)
Frequently Asked Questions
When should I use Adeka Ultraseal KM-String KM4MM instead of KM6MM?
KM4MM is the 4 mm (about 3/16 in) string for smaller interlocks and gaps. Adeka Ultraseal KM-String KM6MM is the 6 mm (about 1/4 in) string when the gap is larger. The OCM sheet sizes the string at about 1.2 times the gap width, so diameter follows the gap, not a preference.
Can Adeka Ultraseal KM-String KM4MM stop flowing water in a sheet-pile interlock?
Yes. The OCM sheet says KM-String can be stretched into a sheet-pile interlock even with flowing water present. Rubber resilience holds KM4MM until swell takes over.
Is Adeka Ultraseal KM-String KM4MM used for CIPP liner work?
Yes. CIPP is a listed use for KM-String on the OCM product page, along with sheet pile and cracks. The 4 mm diameter is the small-gap choice in that family.
How much does Adeka Ultraseal KM-String KM4MM expand by volume?
About 3 times by volume. That is a volume coefficient, not a 3 times diameter change. Linear expansion is about 1.45 on the KM compound sheet.
When is a string a better fit than Adeka Ultraseal P-201 in an interlock?
Use KM-String KM4MM when the interlock is a formed gap that can take a stretched 4 mm string. Use P-201 when the surface is rough, damp, or uneven and a paste bead will seat better than a string.
Will Adeka Ultraseal KM-String KM4MM work in a crack as well as an interlock?
Yes. Cracks and existing joints of various sizes are listed uses. Pick KM4MM when the opening is in the 4 mm range; a wider crack belongs on KM6MM.
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