Long Pot Life Underwater Epoxy Grout System. Five Star® Pile Jacket Epoxy Grout LPL is a high-performance epoxy system designed for underwater grouting and pile encapsulation where a longer pot life system is required. Five Star® Pile Jacket Epoxy Grout LPL is a low viscosity epoxy which is mixed with graded sand aggregate to encapsulate concrete, timber, or steel pilings. It may be pumped or poured in place.