Flashing and waterproofing membrane
A laminate tape that has a bottom layer of aggressive adhesive formulated to have sufficient adhesion to construction materials to as low as 20 degrees F. The adhesive is applied in a layer of about 2 to 5 mils. A second layer that is about 10 to 60 mils thick is made of rubberized asphalt, which provides self-sealing capabilities. In one embodiment, the first layer has strips of adhesive and sections of rubberized asphalt. The third layer is a film, which can be a thin, contiguous polymer, fabric or particulate. The laminate can be used where a strong adhesive is needed that will adhere to construction materials at or near 20 degrees Fahrenheit, while still retaining self-sealing characteristics.
1. A structural sealing laminate comprising:
(a) an adhesive layer having a first side, an opposite second side and a thickness of between about 0.001 and about 0.01 inches;
(b) a bituminous rubberized asphalt layer having a thickness of between about 0.01 and about 0.06 inches, the asphalt layer having a first side secured to the first side of the adhesive layer, the asphalt layer having a second side opposite the first side, wherein the adhesive layer has a different chemical composition than the bituminous rubberized asphalt layer, resulting in adhesive characteristics that are superior to the bituminous rubberized asphalt layer at temperatures less than about 50 degrees F.; and
(c) a film layer having a first side and a second, opposite side secured to the second side of the asphalt layer;
wherein the adhesive layer comprises at least a first strip of adhesive and a second, separate strip of adhesive, the asphalt layer comprises an exposed portion interposed between the first and second adhesive strips, and the exposed asphalt layer portion has a face that is coplanar with the second side of the adhesive layer's first and second strips and forms a planar surface with the second side of the adhesive layer's first and second strips.
2. The structural sealing laminate in accordance with claim 1 , further comprising a release liner releasably secured to the second side of the adhesive layer.
3. The structural sealing laminate in accordance with claim 1 , wherein the adhesive layer has a thickness between about 0.002 and about 0.005 inches.
4. The structural sealing laminate in accordance with claim 3 , wherein the adhesive layer has a thickness between about 0.002 and about 0.003 inches.
5. The structural sealing laminate in accordance with claim 4 , wherein the bituminous rubberized asphalt layer has a thickness between about 0.02 and about 0.04 inches.
6. The structural sealing laminate in accordance with claim 5 , wherein the film layer further comprises a metalized polymer layer.
7. The structural sealing laminate in accordance with claim 6 , wherein the adhesive layer further comprises an adhesive having an adhesion of at least about 1.5 lbs/inch for all temperatures between about 20 degrees F. and about 110 degrees F., when tested in a 180 degree peel test with oriented strand board (OSB).
8. In combination with a flange on a window frame and an adjacent wall edge, a laminate strip disposed in an overlying and sealing relationship with a seam defined by an edge of the flange and the adjacent wall edge, the laminate strip comprising:
(a) an adhesive layer having at least a first strip of adhesive and a second, separate strip of adhesive, the adhesive layer including a first side, an opposite second side and a thickness of between about 0.001 and about 0.01 inches, wherein the second side is adhered to the flange and the adjacent wall edge;
(b) a bituminous rubberized asphalt layer having a thickness of between about 0.02 and about 0.06 inches, the asphalt layer having a first side secured to the first side of the adhesive layer, the asphalt layer having a second side opposite the first side and an exposed portion interposed between the first and second adhesive strips, wherein the exposed asphalt layer portion has a face that is coplanar with the second side of the adhesive layer's first and second strips and is adhered to the flange and the adjacent wall edge, and wherein the adhesive layer has a different chemical composition than the bituminous rubberized asphalt layer, resulting in adhesive characteristics that are superior to the bituminous rubberized asphalt layer at temperatures less than about 50 degrees F.; and
(c) a film layer having a first side and a second, opposite side secured to the second side of the asphalt layer, wherein the second side faces toward the flange and the adjacent wall edge.
9. The combination in accordance with claim 8 , further comprising a fastener penetrating the laminate strip and the flange, thereby forming a passage through the laminate strip, and embedded in the adjacent wall edge, wherein the bituminous rubberized asphalt layer forms a seal around the fastener at the passage to substantially prevent contaminants from passing entirely through the passage.