Moistseal® is a polyvinyl chloride sheet available in a 20 mil. thickness. It will show no cracking or flaking when bent through 180 degrees over a 1/32″ mandrel and then bent at the same point over the same size mandrel in the opposite direction through 360 degrees. The material conforms to A.S.T.M. Standards D-822 for at least 400 hours. Strict quality control assures full weight and uniform thickness. (Recommended for concealed applications only. Note: We do not recommend the use of Moistseal as a long-term thru-wall flashing. Moistseal® is a waterproofing membrane.)
NOTE: ADVANCED BUILDING PRODUCTS, INC. DOES NOT ENDORSE THE USE OF PVC AS A THRU–WALL FLASHING.
Applications:
Foundation Dampproofing:
Install material using the greatest width obtainable and lengths not to exceed 20′. The material shall be applied vertically from the top down and be laid in a full trowel coat of any compatible contact cement using a notched trowel with a cement build–up of not less than 1/16″, which is equivalent to approximately 100 square feet to the gallon. Lap membrane 6″ at all joints. The surface of the membrane shall be rolled in with a rubber hand roller forcing all air out causing cement to protrude around all seams, eliminating all air entrapment. If wrinkles appear and are not gone in 24 hours, rerolling will become necessary. Dampproofing material shall be applied from exterior finish grade down to bottom of foundation wall and tied in with waterproofing at footing. All conduits passing through wall should be sealed with membrane and a compatible contact cement. Prior to back–filling and after 48 hours has elapsed and dampproofing has been inspected and approved, protect the membrane from damage by applying hard–board sheets or 1″ polystyrene boards the full height of the wall, spotting sheets with compatible contact cement to prevent movement during back–filling operation.
Slab Dampproofing:
Install material using the greatest width obtainable and lengths not to exceed 20′. The material shall be laid in a full trowel coat of compatible contact cement, using a notched trowel with a cement build–up of not less than 1/16″, which is equivalent to approximately 100 square feet to the gallon. Joints shall be butt–ended. Apply pressure using 50–100 lb. sectional roller forcing cement to protrude at all joints. Apply a compatible contact cement with the same notched trowel over each joint and cover joints with a minimum of 6″ wide strips of Moistseal again, apply pressure forcing the cement to protrude at all edges. Turn up material at sides and around all columns and vertical protrusions as required.
Dampproofing Under Slab:
On grout surfaces or tamped earth and prior to pouring slab, lay on substrate the widest width and lengths obtainable lapping a minimum of 6″ on sides and 10″ on ends. Seal laps with a full trowel coat of compatible contact cement and apply pressure until a bead of cement appears at edges. Turn up on conduits, columns or any vertical protrusions a minimum of 4″. Where two vapor barriers meet, cement thoroughly to make a watertight joint. Protect membrane after installation against damage by other trades prior to pouring.
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