HeatShield Clean & Etch cleans and etches all clay flue liner interiors for improved adhesion. This product is a must for flue tiles with a glazing compound that was applied at the time the flue tile was manufactured. Flue tiles manufactured in this manner have a shiny finish, similar to pottery, ceramic tile, terra cotta sewer or water pipe.
Clean & Etch cleans residual dust and soot (not glazed creosote – for this, use PCR) and chemically roughens the surface to improve the mechanical and chemical bond of HeatShield Cerfractory Flue Sealant to all clay flue liner systems. Clean & Etch is a hydrofluoric acid generator, which generates an acid etching material upon contact with clay flue liners (or any silica-containing surface) in as little as 15 seconds. It requires no neutralization or rinsing. Once Clean & Etch has dried, flue tiles are ready for coating.
WARNING: This product can expose you to chemicals including ethylene glycol, which is known to the State of California to cause birth defects and other reproductive harm. For more information, go to www.P65Warnings.ca.gov.