Q - I have an underground structure of ICF walls setting on concrete foundation with a concrete roof. How do you recommend I waterproof it with your products? Would I need to prime all surfaces? Would peel and stick work on horizontal surfaces?  

A - How do you recommend I waterproof it with your products?  ICF wall construction will need to be waterproofed using the Poly Wall ‘Home Stretch Membrane for ICF’ sheet waterproofing system.  Do not use the ‘Home Stretch Liquid’ waterproofing system because it will attack / eat the ICF wall substrate!!

Would I need to prime all surfaces?  Yes, the Poly Wall ‘Shur-Tac Liquid Adhesive’ is the primer accessory product safe for the ‘Home Stretch Membrane for ICF’ sheet waterproofing system. Prime all surfaces and membrane laps to ensure a proper adhesive bond to the ICF substrate surface.  Do not use the ‘Polybond Clear Liquid Adhesive’ primer accessory product, which is reserved only for concrete substrate wall surfaces.  A level of caution here, as the Polybond Clear Liquid Adhesive primer will attack/eat the ICF wall substrate!!

Would peel and stick work on horizontal surfaces? No, do not apply Poly Wall sheet or fluid-applied waterproofing systems onto horizontal (floor) surfaces.  They are designed for vertical (wall) applications only, and are not recommended for horizontal (floor) surfaces.

Q - What is the coverage rate on EPS Board for ShurTac adhesive?  

A -  The Shur-Tac Liquid Adhesive is a water-based, low VOC primer specifically designed for use over ICF walls and Expanded Polystyrene (EPS) Foam insulation board.  The established substrate for this adhesive is poured concrete as part of our Home Stretch Membrane ICF waterproofing system.  The given coverage rate on poured concrete is 250 – 350 SF / Gal. 

The EPS board will offer a different texture and porosity, so the coverage rate for the Poly Wall Shur-Tac Liquid Adhesive will be greater than over poured concrete substrates. The coverage rate range for EPS is 250 - 350 SF / Gal, with a maximum rate of 500 SF / Gal.  Specific testing for coverage is recommended. 

Q - In the installation instructions for Home Stretch Liquid Waterproofing, you state coverage should be about 27sf/gallon.  But I also know I will need to put on 2 coats.  So is the 27sf/gallon for the 1st coat?  Or is it saying 27sf/gallon coverage AFTER the second coat?  

A -  Home Stretch Liquid can be applied in (2) coats.  To answer your question, the TOTAL coverage once the full 60 wet mils is applied shall be 27 sf / gal.  It shall be 27 SF / gal when you are all finished, regardless of how many coats are applied to achieve 60 wet mils. 

Please be sure to allow the installed product to cure between each coat.  Since each coat has less product than the full application, the minimum 24 hour cure time shall be shortened by approx. half for each 30 wet mil coating, or by approx. a third for each 20 wet mil coating.  These are approximate numbers for cure time given lighter coats.  Your local temperature and humidity will impact the cure time.

Here is the math for dividing the application into multiple coats:

1604 SF / Gal / wet mil is the constant, for the amount of square footage coverage if applying liquid to a single mil thick.

Full installation (1) coat:  1604 / 60 wet mils = 27 SF / Gal
Half installation (2) coats:  1604 / 30 wet mils = 53 SF / Gal
Third installation (3) coats:  1604 / 20 wet mils = 80 SF / Gal

Therefore, if you wish to apply the product in (2) coats, the recommended coverage is 53 SF / Gal (30 wet mils) per coat. 

Q - I failed to properly seal a 5 gallon pail of Blue Barrier 2400 Flash 'N Wrap, and the product formed a cured hardened film over the top layer, is it OK to dilute the underneath uncured product in order to make use it?

A -   The product should always be tightly secured when not in use. However, a nitrogen-rich spray, like what's available in keyboard cleaner, will need to be sprayed in the pail prior to sealing the pail with the plastic film that's supplied in the Blue Barrier 2400's original product packaging, then re-cover the pail securely with the lid. The combination and sequence of these steps will maintain the product in the pail over time. This procedure must be repeated every time the unused product is re-sealed.

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