Q - We are very interested in using your "Blue Barrier" liquid applied flashing on multiple concrete homes we have coming out of the ground. We are trying to receive confirmation that a three step masonry stucco system will adhere to your product. Do you have any data that can speak to this question?

A -   Poly Wall has the following two (2) application options are approved for stucco veneers:  

1) Use conventional wire lath (reinforcing mesh) with the stucco veneer.  Mechanically fasten the lath through the cured Poly Wall Blue Barrier fluid-applied air barrier membrane, whether the 2300 Liquid Wrap or the 2400 Flash “N Wrap, and the substrate sheathing beneath.  This will allow the reinforcing mesh to be self-supported.  Maintain the air- and water-tight seal, thereby the air barrier performance, by applying and tooling a minimum 30 mils of Blue Barrier 2200 Joint Filler over each mesh fastener head penetrating through the cured Blue Barrier fluid-applied air barrier membrane.  With the lath installed and self-supported, the stucco basecoat (and finish coat) must be completed within (12) months of the Blue Barrier fluid-applied air barrier membrane application.

2) Broadcast silica sand into the wet Blue Barrier fluid-applied air barrier membrane, whether the 2300 Liquid Wrap or the 2400 Flash ‘N Wrap membrane, to the point of refusal to accept any more silica sand.  Once the Blue Barrier fluid-applied membrane is cured, apply Lambert Corporation’s 932 Link, a water-based bonding agent, onto the Blue Barrier membrane.  Also, add the 932 Link into the stucco basecoat using a 1:3 mixing ratio. Allow the stucco basecoat to cure a minimum two (2) days before applying the stucco finish coat.

Q - I’m using your Poly Wall® WindowSeal® on a few Multi-family projects, they're kicking us back on submittals using a NP1 caulking. Apparently it’s too corrosive for this product. Do you have any recommendations on sealant and caulking that will be safe on the asphalt base?

A - Poly Wall® has the following suggestions for selecting sealants and caulks compatible with Poly Wall’s asphalt-based flashing and tape products:

Polyurethane Sealant and Caulking: Two-part polyurethanes are acceptable to be used under the WindowSeal® asphalt flashing tape, as long as they are fully cured according to manufacturer’s recommendations and specification. Single-component urethanes are generally moisture cure; and, when covered by an asphalt flashing tape, will not cure. Both single- and two-part polyurethanes can be used on top of the WindowSeal® tape without affecting the integrity of the flashing tape.

Polysulfide Sealant and Caulking: They are not compatible with WindowSeal®; even the residue can cause severe damage to the integrity of the WindowSeal® asphalt component.

Butyl Sealants: Are acceptable as long as they are fully cured according to the manufacturer’s specifications and recommendations. All solvent must be evaporated completely.  Butyl sealants can be used on top of the membrane.

Silicone Sealants and Caulking: Silicone can be used on top of the WindowSeal® flashing without affecting the integrity of the tape; however, a pull test is suggested to ensure adhesion to the WindowSeal® polyethylene film. Silicone under the flashing tape may only allow moderate adhesion for WindowSeal®. A test patch is recommended prior to the WindowSeal® installation over silicone.

Q - How fast can your 2300 Liquid Wrap be spray applied?

A - You should budget an application rate of 375-750 S/F per hour and lean toward the upper end of that range if you have an experienced and skilled applicator at the end of the line.

Q - I have a rain collection tank I built with SCIP (Structural Concrete Insulated Panels). I can provide pictures of how it was constructed. The interior is a concrete slab with sprayed on shotcrete on the SCIPs. Can the Poly Wall caulk and sprayed on product act as a water proof liner?

A - If the intention is to reuse the collected water to drink or for irrigating crops/plants, then the answer would have to be no.  Under these uses, you would need to find a fluid-applied waterproofing product that is safe for 'potable water.'  The chemicals in our solvent-based waterproofing membrane, called Home Stretch Liquid, negate the use for storing/saving water.

Refer to our Home Stretch Liquid product literature for more information on the chemical composition: http://poly-wall.com/wp-content/uploads/2016/04/PIS-Home-Stretch-Fluid_081816.pdf