Bring the coating to finish grade.ĭampproofing of Exterior Surfaces Below Grade – Porous Surfaces: For dampproofing of porous surfaces such as concrete block, 3 alternate techniques are equally effective (base your selection upon local preference and the availability of equipment).Ī) Two Coat System: Apply a base coat of HE789 – FIB ASPHALT EMULSION DAMPPROOFING, cut 20% by volume with clean water, over entire prepared surface. Spread around all joints, grooves, and slots and into all chases, reveals, and soffits. Carry coating over exposed top and outside edge of footing.
#Fibered asphalt emulsion free
Fill in all crevices and grooves, making sure coating is continuous and free from breaks and pinholes. Apply each coat at 2 to 3 gallons per 100 square feet, allowing the first coat to dry before applying second coat. If applying by spray or for severe conditions, two coats are preferable. material hose from the pump gun is preferred for most applications.ĭampproofing of Exterior Surfaces Below Grade – Dense Surfaces: For dense concrete surfaces not subject to hydrostatic pressure, a single coat of Henry 789 – FIB ASPHALT EMULSION DAMPPROOFING, approximately 1/16″ in For spraying, use Graco 9:1 ratio pump, or equal, capable of delivering 3 – 5 gallons per minute, and a pole gun with 1/8″ – 1/4″ tip. For best results keep brush strokes in one direction and apply additional coats at a right angle to the former coat. Apply with a soft bristle brush or heavy duty spray equipment. A tighter bond will result if surface is damp when coating is applied. Made from selected asphalt, emulsified with bentonite clay, non-asbestos fibers, and water.
Above grade, Henry 789 provides a moisture barrier used for damppoofing the exterior walls in cavity wall construction. Henry 789 Fiber Asphalt Emulsion Damproofing is designed for damproofing the exterior side of below grade foundations and walls.
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