A polyurethane two-part, elastomeric, cold liquid applied membrane, waterproofing system. The system provides seamless leak protection to inverted roofs, flat roofs, podium decks, balconies, blue roofs and living/green roofs.

Features and benefits:

BBA Certified - 16-5311.
Inverted roofs.
Podium decks.
Balconies.
Blue roofs.
Extensive green roofs.
Intensive green roofs.
Biodiverse roofs.
Roof gardens.
Can be laid on a flat roof deck with zero falls.
Cold application removes risk of fire.
Seamless waterproofing.
High solids at 99.6% (by weight) provide an elastomeric, impervious, tough and seamless membrane, preventing moisture transmission.
Extremely low odour in wet state, curing to an inert system.
Durable and does not embrittle with age.
Performance equalling lifetime of building, when covered.
Recycled rubber crumb and other renewable elements contributes to sustainability.
Chemical resistant.
Flexible and crack resistant, including crack bridging at low temperatures.
High bond strength.
Resistant to dynamic stress.
NHBC Standards 2023.

All works shall be carried out in accordance with the requirements of BS 6229: 2018 Code of Practice for flat roofs with continuously supported coverings, and BS 8217: 2004 Reinforced bitumen membranes for roofing Code of Practice.

System components:

Cold Melt® Membrane — a two-part, liquid-applied polyurethane consisting of a resin component and a hardener.
Cold Melt® DPM Primer — a two-part primer for use in preparing concrete substrates and polymer-modified sand/cement screeds with a moisture content greater than 75% relative humidity, prior to application of the carrier membrane.
Pro-Prime® SA — a single component primer for use in preparing timber and concrete substrates and polymer-modified sand/cement screeds with a moisture content less than 75% relative humidity, prior to application of the carrier membrane.
Pro Vapour Control/Carrier Membrane SA — a 0.6 mm thick, self-adhesive carrier membrane for use over primed substrates prior to application of Cold Melt® Membrane.
Pro-Grit 0.7–1.2 mm — kiln-dried quartz sand broadcast into wet Cold Melt® DPM, to produce a mechanical key for sand/cement screeds and bedding mortars when used as an alkali protection layer.

Consult manufacturers literature for component specific technical information, and for details regarding preliminaries, structure and loadings, liability information, and further guidelines.

BBA - Proteus Cold Melt®