Izhora MBR-G-90 insulating mastic — hot-applied bitumen-rubber mastic

Izhora MBR-G-90 mastic is a one-component bitumen-rubber compound that is heated to +160…+180 °C before application in kettles with indirect heating. It is used to protect underground and above-ground gas and oil pipelines and petroleum product tanks from soil corrosion, electrocorrosion and stray currents, when laying tram rails, and for waterproofing building structures. The material complies with GOST 15836-79, softens at 100 °C, adheres to metal with a strength of 2 MPa and is suitable for all climatic zones. It is applied at air temperatures from −10 °C, with no precipitation.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”
Type	mastics and liquid membranes
Use	foundations and basements, tanks and pools
Base	one-component hot-applied bitumen-rubber mastic (bitumen, plasticisers, filler)
Colour	black
Packaging	24 kg cardboard drums with polyethylene film
Application method	clean metal of rust, dirt and dust by sandblasting or mechanically, concrete — of dust and weakened concrete, dedust and dry; degrease; prime by brush or sprayer (Brit bitumen primer recommended); heat to +160…+180 °C in automatic kettles with indirect heating, temperature control and agitation (direct heating and overheating are prohibited), time from heating to pouring not more than 3 h; apply in a coat of at least 2 mm by brush or by pouring and spreading with a rubber squeegee; reinforce while hot if necessary
Application temperature	air not lower than −10 °C, no precipitation; working temperature of the mastic +160…+180 °C
Curing	no mechanical impact on the coat until it has cooled completely
Key properties	softening point (ring and ball) 100 °C; needle penetration at +25 °C 20 (0.1 mm); ductility at +25 °C 3.7 cm; elasticity at +25 °C 80 %; bond strength to concrete 0.5 MPa, to metal 2 MPa (+20 °C); flexibility on a Ø50 mm rod at −15±1 °C — no cracks; water absorption over 24 h 0.2 %; Fraass breaking point −17 °C; chemical resistance (3 % NaCl, 3 % NaOH, 25 % H2SO4) — resistant; impact strength of the coating 4 J (−30…+40 °C); cathodic disbondment area 5 cm² (+20 °C), 10 cm² (+40 °C); transition resistance in 3 % NaCl 1·10^8 Ohm·m²; density 1.05 kg/dm3; all climatic zones
Layer thickness	at least 2 mm
Consumption	2.1 kg/m² for a 2 mm coat
Shelf life	24 months from the date of manufacture
Standards	TU 5775-002-11149403-97; compliance with GOST 15836-79

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.