House Wrap

In the building and construction industry, confidence is key. You work hard to build the best structures possible, knowing your reputation is on the line. That’s why weatherization is so important.

What happens without proper building weatherization?
• Moisture seeps into the building structure.
• Wood and other materials can rot.
• Mold can form.
• If left untreated, structures can fail.

Kimberly-Clark BLOCK-IT* House Wrap helps you maintain a dry building structure for years to come thanks to our patented technology that actually channels liquid away from the wall assembly to the ground.

You get it all with BLOCK-IT* House Wrap:
• Easy to handle and install
• A tough liquid barrier to prevent water penetration
• Breathable barrier technology that lets vapor escape
• 10-Year Limited Warranty
• Premium protection at affordable pricing

Product Specifications
• 180 days UV-stabilized
• Meets requirements of ASTM E2273 Drainage Test 2
• Meets requirements of ICC-ES AC38 Water Resistive Barrier 2
• Meets requirements of ASTM E2178 Air Permeance of Building Materials 2
• Meets requirements of ASTM 84 Class A Flame Spread Index and smoke developed index 3
10-Year Limited Warranty 2
• Made in the USA

Tips for using BLOCK-IT* House Wrap:
• Store BLOCK-IT* in a clean, dry, covered area until installation.
• Use a sharp razor knife to cut BLOCK-IT*.
• Use a good quality C920 Class 25 caulk and/or flashing tape with acrylic or butyl adhesive for sealing windows, doors or penetrations.
• Roll all seam and flashing tapes after installation with a J-roller to ensure proper bonding.
• Limit UV exposure to 6 months.
• Use a release layer (building paper) when installing a product that could bond to BLOCK-IT® such as stucco.

Download BLOCK-IT* House Wrap Installation Guide.

Take the protection of your structure to the next level. Use BLOCK-IT* House Wrap with BLOCK-IT* Tapes.

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Download our sales brochure


  • 1The surface pattern on Kimberly-Clark BLOCK-IT* House Wrap can help with anti-slip, but the surface may still become slippery in some conditions and caution should be taken when using ladders or walking upon.
  • 2You must follow Kimberly-Clark BLOCK-IT* House Wrap Installation Instructions and requirements to ensure proper water barrier performance of Kimberly-Clark BLOCK-IT* House Wrap and maintain the warranty.
  • 3Kimberly-Clark BLOCK-IT* House Wrap is combustible and should not be placed near an open flame or sources of ignition.Contact on either surface with chemicals including coatings, cleaning agents or otherwise can affect the performance of Kimberly-Clark BLOCK-IT* House Wrap.


Give Your Building a Complete Weatherization Envelope using

BLOCK-IT* Seam Tape
Use BLOCK-IT* Seam Tape with BLOCK-IT* House Wrap to create the complete weatherization envelope for your construction projects.

• Aggressive acrylic adhesive bonding strength
• Aggressive adhesive designed to work with the drainage capabilities of our BLOCK-IT* House Wrap
• 3.0 mil thickness delivering one of the strongest house wrap tapes in the market
• Easy-tear technology
• 1.89” x 164’ / 12 rolls per case
• 2.83” x 164’ / 8 rolls per case

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BLOCK-IT* Flashing Tape
BLOCK-IT* Flashing Tape contains poyolefin fabric with a butyl adhesive.

• Seamless protection against moisture during construction and after siding is installed
• Prohibits water infiltration, air conditioning and heat loss around door and window openings
• Long-term adhesion to a variety of surfaces including OSB and other standard building substrates
• Exceptional nail sealability
• Aggressive butyl adhesive
• Meets AAMA711-07 strength requirements
• 4” x 75’ / 12 rolls per case
• 6” x 75’ / 6 rolls per case

BLOCK-IT* Flex Flashing Tape
BLOCK-IT* Flex Flashing Tape with butyl adhesive is ideal for exterior flashing construction applications.

• Conforms to angled and contoured surfaces
• Seamless protection against moisture infiltration
• Long-term adhesion to a variety of surfaces including OSB, anodized aluminum, vinyl,plywood and concrete
• Exceptional nail sealability
• Meets requirements of AAMA 711-13
• 6” x 75’ / 4 rolls per case
• 9” x 75’ / 2 rolls per case

Roll all seam and flashing tapes after installation with a J-roller to ensure proper bonding.

Keep your buildings dry for years to come. Use BLOCK-IT* Tapes with BLOCK-IT* House Wrap.

Floor Underlayment

• Recommended for all staple and nail down installation of solid and engineered wood floors, laminate, or click-together vinyl
• Use over concrete and wood sub floors
• Noise dampening within the room and floors below
• Tough, breathable moisture barrier
• Air circulation feature to dry any trapped moisture
• Helps prevent musty odors in the floor assembly
• Easy installation
• Made in the USA
• Coverage 100 sq. ft. / 36 in. x 33.34 ft. / 0.914 m x 10.16 m

Download BLOCK-IT* Floor Underlayment Installation Guide.

Download BLOCK-IT* Floor Underlayment Technical Data..

GREENGUARD Gold Certification

What does this mean?

• GREENGUARD Certification ensures that a product has met some of the world’s most rigorous and comprehensive standards for low emissions of volatile organic compounds (VOCs) into indoor air.
• The GREENGUARD Gold standard includes health based criteria for additional chemicals and also requires lower total VOC emissions levels to ensure that products are acceptable for use in environments such as schools and healthcare facilities. In addition to limiting emissions of more than 360 VOCs and total chemical emissions, GREENGUARD Gold Certified products must also comply with requirements of the State of California’s Department of Public Health “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers, Version 1.1 (2010)” (also known as California Section 01350)
• Products with GREENGUARD Gold Certification can contribute to LEED credits for low-emitting materials.

Why is this so important?

• GREENGUARD Certification is recognized and referenced in numerous building programs, standards and specifications around the world. Products with GREENGUARD Certification or GREENGUARD Gold Certification can contribute to the achievement of points in established green building rating systems, satisfy code or ordinance criteria and meet indoor air quality specific RFP requirements.
• GREENGUARD Certification helps provide assurance that products are low-emitting, and contribute to healthier interiors.

To learn more about our GREENGUARD Certification, visit or download our Certification Information PDF.

Media, Events, Videos & Awards

2017/2018 BLOCK-IT* - BLOCK and Tackle Sweepstakes
Congratulations to our winner Marc Hartmann of Renaissance Homes in Lake Oswego, OR. Marc’s Preferred Dealer Location is Lakeside Lumber in Tualatin, OR.

Check out our BLOCK-IT* House Wrap video to see why this new product is a must for builders and contractors.

Check out our BLOCK-IT* House Wrap drainage demo video to see how our product gives you over 98% water drainage efficiency.

Click here to see BLOCK-IT* House Wrap in the Tiny Town event at NAHB’s International Builders' Show® (IBS) 2016

Click here to see BLOCK-IT* Trade Publication Ads

Click here to see BLOCK-IT* House Wrap Article Reprint

Bronze Innovation Award          NGHtv

Our Guarantee

Kimberly-Clark BLOCK-IT* House Wrap comes with a 10-Year Limited Product Only Warranty.

10-Year Limited Product Only Warranty:
Kimberly-Clark Global Sales, LLC warrants to the original registered owner of the structure at the time of installation (the “Owner”) for a period of ten (10) years from the date of purchase, that the Kimberly-Clark BLOCK-IT* House Wrap (the “Product”) will meet the strength performance properties pursuant to ASTM D5034 and water hold out performance properties pursuant to ASTM D779 upon proper installation and in strict accordance with the Product Installation Guidelines and applicable building codes and accepted industry standards for the structure type. Kimberly-Clark’s liability under this Limited Warranty is limited to providing replacement house wrap product.

Additional Limited Warranty Terms:
Kimberly-Clark provides this warranty only to the Owner of a structure that is located within the United States and is less than five (5) stories in height upon the terms and conditions set forth herein. This warranty is not transferrable and is only applicable to the Owner, and such installation occurred on or after March 31st, 2014. Replacement of the Product does not extend the warranty, and terms will always begin from the date of purchase of the Product to which this Limited Warranty applies.As referenced herein, the “Product Installation Guidelines” and the strength performance properties and water hold out performance properties are available at and in effect on the date of purchase of the Product.

10-Year Limited Warranty DOES NOT COVER DAMAGE caused by or resulting from any (but not limited to) of the following:

  • Negligence, gross negligence or willful misconduct of the builder, general contractor or installer or any third party including the Owner.
  • Improper maintenance, improper installation, mishandling, product modification, damage, vandalism or acts or God.
  • Installation of Product on any structure that is five (5) stories or greater.
  • Any structure outside of the United States.
  • Any foreign objects or agents that are used in installation that are outside of the Product Installation Guidelines or that are incompatible with the Product.
  • Defects in the structure or any of its components.
  • UV exposure of the Product that exceeds the published Specifications.
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How To Make A Claim:
All claims and service under this Limited Warranty must be made in writing to Kimberly-Clark Global Sales, LLC, 1400 Holcomb Bridge Road, Roswell, GA 30076 Attention: Kimberly-Clark BLOCK-IT* House Wrap Technical Lead. All claims must be submitted within sixty (60) days after the initial discovery and must include proof of purchase and of proper installation per the complete Product Installation Guidelines. Kimberly-Clark must be provided complete access to inspect the structure specified in the claim, recover samples, take pictures and complete any other investigation necessary to determine if the claim was due to a failure of the Product. Failure to follow these procedures in reporting a claim will void this Limited Warranty.

10-Year Limited Warranty Exclusion of Damages:
The sole liability of Kimberly-Clark under this warranty is limited only to the replacement of the defective Product caused solely by the failure of the Product to meet the strength performance properties pursuant to ASTM D5034 and water hold out performance properties pursuant to ASTM D779. Kimberly-Clark shall not be liable in tort or any contract or otherwise for any direct, incidental or consequential, exemplary, punitive or any other damages of any kind in connection with or relating to the Product including but not limited to property damage, loss of profits, loss of use or any breach of any express or implied warranty, lost revenue, personal injury or death.

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About Kimberly-Clark

Kimberly-Clark leads the world in essentials for a better life:
• Billions of people around the world choose our products to make a positive difference in their lives.
• Our leading brands are sold in more than 175 countries.
• Nearly one-quarter of the world’s population purchase our products every day.
• 140+ years in business.

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You can trust Kimberly-Clark to provide the solutions you need. Our expertise in nonwoven, breathable materials is unmatched:
• We invented five major consumer product categories.
• We have an extensive patent estate covering a broad range of processes and materials.
• We help keep babies’ bottoms dry and healthy.
• We protect workers and help them stay safe, healthy and productive at work.
• We partner with branded and contract manufacturers to provide high-quality materials for the manufacturer of filtration media, protective fabrics, and wiping substrates.

Now, Kimberly-Clark is leveraging our nonwovens expertise with a new line of building materials, designed to keep moisture out but let vapor escape. Our BLOCK-IT* product line is made in the USA with patented technologies.

We know the quality of the structure you build depends on the quality of the weatherization products you choose. With BLOCK-IT* products, you can have confidence in the weatherization of your structure.

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