Prometheus Developments

A remarkable water based flexible sealant system based on MIPS technology

PD51 is a gunnable paste that dries to a flexible intumescent fire retardant rubber.

PD51 is the final result of an evaluation programme to use wet MIPS dispersion to produce an intumescent sealant.

The formulation is simply:

• MIPS 80% dispersion
• Synthomer Revacryl 387

China clay may be added up to 20% to reduce cost and increase stiffness. Pigments etc. may be added at will.

On internal testing as a seal to 25mm calcium silicate board:

• the product sealed a 10mm gap
• it gave a lower back face temperature than the board when it failed at delta 160°C
• the sealant was still flexible on the cold face when cool

PD51 may also be used as a halogen free carpet backing.