VoidSpan Pozzolanic Hydraulic Lime Grouts and Binders contain a blended hydraulic binder and sand, with less than 2% chemical admixtures by weight.

Our formulations contain lime, pozzolan and, in our PHLc products, a very small amount of cement. By combining the forgiving properties of lime with the more rapid, airless cure of a hydraulic binder, we have created more breathable, “softer” materials that are compatible with historic masonry structures, while meeting the logistical demands of today.

Our careful, quantity-controlled blending of lime and pozzolan in just the right proportion allows for complete reaction of the lime, without the residuals that can bleed out of the masonry and cause streaking in non-hydraulic lime applications.

VoidSpan Pozzolanic Hydraulic Lime Grouts and Binders contain no significant chlorides or corrosive materials. The ultra-low 0.06% shrinkage is achieved without the use of chemical shrinkage compensators, which can sometimes cause damage when in contact with embedded metal elements.

VoidSpan PHLc comes in 50-lb. bags or in recyclable 5-gallon plastic pails, each to be mixed with one gallon of water. It also comes in 3,000lb “Super-sacks”.

VoidSpan PHLc70 comes in 1 and 5 gallon containers to be mixed with 1 part water for 5 to 5.5 parts PHLc70 by volume.

Our grouts are very flowable products that can be placed by gravity feeding, pumping and cylinder injection. They can travel relatively long distances in properly prepared and contained cavities and narrow cracks.