Ultraplat bentonite cord — swelling profile for construction joints
Self-expanding bentonite-rubber profile for construction joints and service penetrations; swelling of at least 400% in 24 h.

This plaster mix with a penetrating effect is designed not only for concrete but also for brick and rubble masonry and natural stone. It protects foundations, basements, tanks and pools while levelling the substrate and filling joints, cracks and seams; the mix is applied by hand with a spatula, trowel or float. The hardened layer has watertightness of at least W16, compressive strength of at least 30 MPa and adhesion to concrete of at least 1.5 MPa, with a service temperature from −60 to +130 °C.
| Manufacturer | Kalmatron — OOO “Kalmatron-SPb”, Saint Petersburg |
|---|---|
| Type | coating waterproofing |
| Use | foundations and basements, tanks and pools |
| Base | fine-grained dry mix: Portland cement, graded sand, a complex of patented chemically active reagents (plaster mix with a penetrating effect); aggregate size max 0.63 mm |
| Colour | grey (free-flowing grey powder) |
| Packaging | 25 kg paper bags |
| Application method | onto concrete, brick and rubble masonry, natural stone; clean the substrate down to sound material and moisten to full saturation (3–5 passes, at least 5 l/m²); water 160–190 ml per 1 kg (4.0–4.75 l per 25 kg); mixing 3–5 min, pause, re-mixing; applied by hand with a wide spatula, trowel or float in a continuous layer, carefully filling joints, cracks and seams; layers over 10 mm — over plaster mesh |
| Application temperature | not below +5 °C (ambient air and structure) |
| Curing | after setting (0.5–2.0 h) moisten; during the first 3 days every 2–4 h, do not allow drying out |
| Key properties | watertightness at least W16 (GOST 12730.5-84); frost resistance at least F1 200 (GOST 58277); compressive strength at least 30 MPa; adhesion to concrete at least 1.5 MPa (GOST 58277); workability retention at least 30 min; service temperature -60…+130 °C |
| Layer thickness | 5–20 mm; over 10 mm — over plaster mesh |
| Consumption | 1.7 kg/m² at a thickness of 1 mm |
| Shelf life | 12 months in undamaged original packaging; covered dry room, humidity max 70%, not below +5 °C |
| Standards | GOST 31357-2007; TU 5745-009-54282519-2008 amend. 4; declaration ROSS RU D-RU.RA01.V.20113/19 dated 07.02.2019, valid until 06.02.2029 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Self-expanding bentonite-rubber profile for construction joints and service penetrations; swelling of at least 400% in 24 h.
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