Construction Supply Sourcing promoting dustless blasting. One of the products used in dustless sandblasting is a flash rust retarder called Hold Blast. Construction Supply Sourcing is distributing Hold* Blast by Chlor Rid International Inc. chlor-rid.com. Hold*Blast is a surface passivator that stops flash rusting. Hold Blast is an easy to use and economical product that stops flash rust-in and environmentally friendly and non-hazardous manner. Hold*Blast can be used in dry or wet sandblasting. The use of Hold*Blast will not interfere with coating adhesion. GlassBlast in small packages is also available at Construction Supply Sourcing.