DuPont™ LiquidArmor™ LT Flashing and Sealant

Advanced Flashing Solution for Low-Temperature Commercial Applications

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DuPont™ LiquidArmor™ LT Flashing and Sealant

Advanced Flashing Solution for Low-Temperature Commercial Applications

<br><b>DuPont™ LiquidArmor™ LT Flashing and Sealant</b> is a durable, flexible, single-component silicone flashing alternative suitable for low-temperature applications, designed to provide commercial buildings with advanced moisture and air sealing protection. It forms tight and seamless barriers along the rough openings of windows and doors as well as insulation board joints. Compatible with DuPont™ Commercial Wall Systems and foam insulation products, LiquidArmor™ LT is formulated as a cold weather alternative to LiquidArmor™ QS, allowing application as low as -20 °F (-29 °C). <br><br> <b>LiquidArmor™ LT</b> features a long tooling time to facilitate workflow of prepping a whole window opening and is designed to have high abrasion resistance and durability during the window and door installation process. It seals gaps up to 6mm (1/4 in.) wide and offers a reliable replacement to peel and stick flashing tapes as well as liquid flashing products that require a mesh. <br><br> <b>LiquidArmor™ LT</b> is trowel-applied after either dispensing from a sausage gun or directly from a pail. It works on a wide range of surfaces without primer, including foam boards, steel studs, fiberglass-faced gypsum board and concrete masonry units. The moisture-cured, fluid flashing solution seals around screws and veneer anchors, resulting in a durable and resilient barrier suited to withstand jobsite variations. Once LiquidArmor™ LT is applied at board joints and penetrations, it forms part of a continuous air and moisture barrier per DuPont’s commercial wall systems.
 
 
 
 
 
 

Features & Benefits 

 
 
 
 
 
 

Specifications

 
 
 

Standard Sizes

Unit Unit Size Units per Case Cases per Pallet Units per Pallet
Pail 2 oz - - 60
Sausage 20 oz 16 48 768
 
 
 

Testing

<b>LiquidArmor™ LT Flashing and Sealant</b> exhibits physical properties as indicated in the tables below when tested as represented. Review all instructions and (Material) Safety Data Sheet ((M)SDS) before use. Please contact DuPont at 1-833-338-7668 when additional guidance is required for writing specifications that include this product.

TEST METHOD TEST TITLE PROPERTY RESULTS
STRENGTH
ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension Tensile Strength 1450 (210) kPa (psi)
ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension Elongation at Break 2.7
WATER
ASTM E96 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials Water Vapor Transmission Method B 180 (3.1) ng/Pa-s-m2
(perm) @ ~28 dry mils
ADHESION
ASTM D4541 Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers Pull Adhesion to Thermax™, Gypsum-Based Sheathing, Plywood, OSB, metals >110 (>16) kPa (psi)
GENERAL
ASTM C661 Standard Test Method for Indentation Hardness of Elastomeric-Type Sealants by Means of a Durometer Durometer Hardness, Shore A 40
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

FAQ

How large of a gap will DuPont™ LiquidArmor™ LT Flashing and Sealant bridge? What should be done where gaps exceed this limit?
DuPont™ LiquidArmor™ LT Flashing and Sealant can span gaps up to ¼ inch.For gaps exceeding ¼ inch, fill the gap with a backing material, and then apply LiquidArmor™ over the backing material.

The gap size and location will determine what backing material is most suitable. Popular choices that are compatible with LiquidArmor™ LT include: Great Stuff Pro™ Gaps & Cracks, Great Stuff Pro™ Window & Door and foam backer rod. If Great Stuff Pro™ Gaps & Cracksor Great Stuff Pro™ Window & Door is used, be sure it is fully cured before applying LiquidArmor™ LT.

LiquidArmor™ Flashing and Sealant products are designed to span non-moving joints (joints that move <15%). If more movement is needed, consider traditional expansion joint treatments or contact your local DuPont representative for suggestions.

What is the shelf life of DuPont™ LiquidArmor™ LT Flashing and Sealant?
LiquidArmor™ LT Flashing and Sealant, when stored in its original air tight container, has a shelf life of 12 months.
The DuPont™ LiquidArmor™ LT Flashing and Sealant product information sheet states thatLiquidArmor™ LT is 'rain resistant'. What does that mean? How long must LiquidArmor™ cure before it can resist rain?
LiquidArmor™ LT starts to develop a good quality skin typically 30-40 minutes after the product is applied. LiquidArmor™ LT exhibits rain resistance as early as 15 minutes after product application.
How thick should DuPont™ LiquidArmor™ LT Flashing and Sealant be applied? What will happen if it is applied thinner? Thicker?
It is recommended to apply LiquidArmor™ LT at 30 (+/-5) wet mills. LiquidArmor™ LT was designed and tested to perform optimally in this thickness range. A wet film thickness gauge, typically available at paint supply stores, can be used to verify product application thickness during installation.

As the application thickness increases, the product may take longer to completely dry. As the application thickness extends below the recommended minimum thickness, the air and water barrier performance of LiquidArmor™ LT may become compromised.

Ensure product application complies with local building codes.

How long does it take for DuPont™ LiquidArmor™ LT Flashing and Sealant to cure?
The drying time for LiquidArmor™ Flashing & Sealant products depends on humidity, temperature, sun exposure and wind direction.

LiquidArmor™ LT will typically be 'dry to touch' within 30-45 minutes.Cure time is related to conditions and at lower temperatures, the tack free time could extend to 60 minutes.LiquidArmor™ LT is rain resistant within 15 minutes.

It is recommended that building components, such as windows, that will be in contact with LiquidArmor™ Flashing and Sealant, are not to be installed until the LiquidArmor™ is 'dry to the touch'.

Does DuPont™ LiquidArmor™ LT Flashing and Sealant adhere equally to all substrates? For example, will LiquidArmor™ LT have the same adhesion to un-faced polystyrene foam as it does with faced polystyrene foam, OSB, and house wraps?
LiquidArmor™ LT adhere well to most common building materials.

LiquidArmor™ LT adheres well to CMU block, extruded polystyrene foam, polyisocyanurate foam, aluminum, steel, OSB, plywood, silicone caulk and Dens glass gold. LiquidArmor™ LT generally does not adhere well to polyolefin materials.

As with all adhesive type products, actual adhesion strength to various substrates will vary. LiquidArmor™ Flashing and Sealant products exhibit higher adhesion properties to CMU block, wood products and steel than they do to lower surface energy materials. It is reasonable practice to apply a small amount ofLiquidArmor™ Flashing and Sealant on any new substrates, allow it to cure and assess its adhesion using a field pull test method like ASTM D4541.

Can DuPont™ LiquidArmor™ QS Flashing and Sealant be used with DuPont™ LiquidArmor™ LT Flashing and Sealant?
LiquidArmor™ QS can come into contact with LiquidArmor™ LT once one of the materials has fully cured. LiquidArmor™ QS will not bond to LiquidArmor™ LT, but Fluid Applied WB+™ will bond to LiquidArmor™ QS.
Does DuPont™ LiquidArmor™ LT Flashing and Sealant product meet the 2021 and 2024 International Building Code (IBC)?
Yes. LiquidArmor™ Flashing and Sealant products do comply with the 2021 and 2024 International Building Code (IBC), flashing material requirements under the IBC center around moisture management. In addition, some fire testing is required for flashings used in exterior walls containing foam plastics.

First, the IBC requires that 'Flashings be installed in such a manner so as to prevent moisture from entering the wall or to redirect it to the exterior. 'The IBC does not directly call out performance metrics for the flashing, but it does call out under Section 1402.2 that ASTM E331 testing may be used to demonstrate an exterior wall envelope's ability to resist wind-driven rain. LiquidArmor™ LT has been tested per ASTM E331 at 6.24 psf (~49 mph wind*) in two commercial wall assemblies including penetrations and board joints flashed with LiquidArmor™. The first wall system tested was the DuPont™ Thermax™ Wall System (TWS) with LiquidArmor™ QS and LT; the wall system effectively prevented water penetration.

Second, while LiquidArmor™LT is NOT a foam plastic, Section 2603.5.5 in foam plastics section of the IBC does require that an entire wall assembly of an exterior wall in building Types I, II, III and IV pass NFPA285 if the exterior wall contains a foam plastic. LiquidArmor™ LT has been evaluated and approved for use in multiple exterior wall assemblies that contain foam plastic, including the Ultra Wall System and the Thermax™ Wall System. See your local DuPont sales representative for more details.

What is the coverage rate for DuPont™ LiquidArmor™ LT Flashing and Sealant?
The coverage rates for LiquidArmor™ LT vary with the thickness and the width applied as well as the building design. The house theoretical yield for a 2 gallon pail and 20 oz sausage, assuming a 30 wet mil application thickness.
 
 
 
 
 
 

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