Saw on my Google alerts that WR Grace has applied for a new patent on a waterproofing membrane they claim to have invented.

PatentDocs has the application listed on their site. You can read it by clicking here.

Abstract:

Disclosed is a waterproofing membrane that performs well at both high and low temperatures. The waterproofing membrane comprises a carrier support layer and an adhesive layer, wherein the adhesive layer comprises a pressure sensitive bitumen composition comprising bitumen (asphalt), synthetic rubber, high density polyethylene, ground vulcanized crumb rubber and, optionally, a plasticizer. The waterproofing membrane also may optionally include a removable release sheet on the adhesive layer.

Description:

FIELD OF THE INVENTION

[0001]The present invention relates to an adhesive waterproofing membrane that is adhered to a building or construction substrate to prevent water infiltration. In particular, it relates to a waterproofing membrane that performs well at both high and low temperatures.