TECHNONICOL No. 21 (Technomast) roofing and waterproofing mastic — bitumen-rubber
Cold bitumen-rubber mastic for mastic roofs, roof repair and foundation waterproofing; elongation at least 500%, flexibility at −35 °C.

IC-125-2-SP combines two barriers: a PVC strip with asymmetric sealing ribs and a swelling polymer profile factory-fitted along the edges. The waterstop is designed for cold joints at the “foundation slab — wall” and “floor slab — wall” connections of foundations, buried, underground and hydraulic structures. It is fixed to the top layer of slab reinforcement along the axis of the future wall with fixings from the kit, overlaps are welded with hot air, and the swelling profile is kept from getting wet until concreting. Elongation at break is 300%, service temperatures are from −40 to +70 °C.
| Manufacturer | TECHNONICOL — OOO “Zavod Logicroof”, Ryazan |
|---|---|
| Type | waterstops and swelling profiles |
| Use | joints and junctions, foundations and basements, hydraulic structures and dams |
| Base | profiled strip of plasticised PVC (extrusion) with asymmetric sealing ribs and a swelling polymer profile factory-fitted along the edges |
| Packaging | coils of various lengths in polymer film; fixings included |
| Application method | cold joints at the “foundation slab — wall” and “floor slab — wall” connections of foundations, buried, underground and hydraulic structures; two-level protection (PVC strip + swelling profile); installed on the top layer of slab reinforcement along the axis of the future wall, with the short part towards the slab reinforcement; fixings from the kit on tie wire at 25–30 cm spacing; in walls — tie wire or a “star” spacer at the edge anchors; at corners — a smooth bend of approx. 100 mm; weld overlaps with hot air; do not let the swelling profile get wet before concreting; if the profile is damaged, the voids can be filled with TECHNONICOL swelling sealant |
| Key properties | Shore A hardness 80; tensile strength at break 10 MPa; elongation at break 300%; change in linear dimensions at 70 °C over 6 h 2.0%; flexibility on a bar R = 10 mm — no cracks at −10 °C; service temperature range −40…+70 °C |
| Layer thickness | profile dimensions: a = 125 mm, b = 30 mm, c = 25 mm, d = 70 mm |
| Shelf life | 24 months from the date of manufacture; store in a dry enclosed room on pallets, horizontally, without deforming loads, away from sunlight and moisture |
| Standards | STO 72746455-3.4.4-2015 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Cold bitumen-rubber mastic for mastic roofs, roof repair and foundation waterproofing; elongation at least 500%, flexibility at −35 °C.
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