Call us at 414-375-8101

WeatherBloc 21st building solutions Made in the USA

Weather-Bloc Systems is a Manufacturer of Advanced Energy Saving and Sealing Products.

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Flashing Tapes

Best variety of flashing tapes

Flashing Tape

Flashing tape for window and doors
All of our flashing tapes are 100% air and moisture barriers that are self-adhered peel and stick products.
Window and door flashing tape
WeatherMax is designed to adhere is super wet conditions, even under water. Avoid weather delays and save money using Weather-Max with Mirco-Grab™ adhesive technology.

Wet OSB, No problem - Max Sticks!

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Best flashing tape on the market
Xtreme Weather Flashing Tape is our best air and moisture barrier for around windows and doors.
Alaskan Grade
Micro-Grab™ Adhesive allows it to stick in super cold Weather (-30ºF) and even in wet condition, even underwater.

Find out why contractors everywhere are switching to this incredible tape.

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Stucco or EIFS Crack tape for joints or flashing
Insulation joint have a tendency to crack and open allowing moisture to ruin a EIFS or Stucco system. Commercial Crack Control has been engineered to be an anti-fracture tape that moves independently with each substrate.


Tape Expands and Contracts with substrate.

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Residential tape for Stucco or EIFS Crack tape for joints or flashing
This residential product is perfect for sealing joints on EIFs and Stucco. Works with EPS and XPS to form a water and moisture barrier at the joint.

Surface has superior bonding capacity.

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Creat tape for OSB joints
Seam Sheathing Tape is design to aid in reducing moisture and air infiltration at the seams. This product will adhere to OSB even in wet or freezing weather conditions and really is a fur flashing tape.

Waterproof Tape for Seams

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Best SIP or SIPs tape on the market for joints sticks to OSB
SIPs Seam Tape has been designed to withstand heavy building movement and provide a air and moisture barrier. Sips Seam Tape has superior strength and will not tear even under the most severe building movement.

Sticks to even Wet OSB

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Through wall or thru wall flashing tape
No Droll, Thru-Wall Flashing protects the wall structure behind brickwork from mold, mildew and decay due to water infiltration.

Masonry Flashing that lasts!

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Tape for house wrap
Seam Rap Tape is a peel and stick house wrap tape that block both moisture and air infiltration at the joint or rips.
House Wrap Tape That Bonds!
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Joint Tape for FRP or fiberglass reinforced panel
This peel and stick tape allows for joint movement but will not split or tear. Coat it with matching paint and the system is complete.
Makes the joint waterproof.
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HVAC Tape
Weather Bloc's DuctTite™ HVAC Foil Flashing Tape uses Micro-Grab technology, which insures our adhesive adheres to the ducts.

Performs even better outside!

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Seal your box sill
Max-Shield Perimeter Sill Flash stops air/ moisture infiltration and protect structural framing at the foundation/ wall assembly. This Peel & Stick tape offers super strength and easy application.

Can reduce Utility Costs by 15%

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Protect the top of your insulation with flexible Z channel
Z Flex is a Flexible Z Channel Tape that creates a waterproof detail where two different plains need to transition. Comes in roll form for easy transport and installation.

Seal Off the Top of Your Foundation Insulation!

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Window & Door Products

Seal your windows and door

Window and Door Products

Seal your window and doors
Our window and door products are designed to help save energy, seal out air/moisture and provide a protection barrier.
Best Window pan no caulk
Wrapid Pan collects the water in a pan and safely guides it out of the window system without damaging the window sill or structural framing.




Extends the life of the window structure!

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Product to use at bottom of windw for water flow
This amazing Window Moisture Management System acts like a one way valve at the bottom of the window flange… allows moisture to flow out, but blocks it from getting back in.



Extend window life and protect the substructure!

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Best Pan System for doors cheapest
Wrapid Pan Door collects the water in a pan and safely guides it out of the window system without damaging the structural framing. It also blocks air and moisture from blowing under the Threshold.




Every Patio Door should have Wrapid Pan

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Seal your door from water leaks
ThresTite is a permanent gasket seal designed to eliminate air and moisture from entering slab-on-grade door thresholds. This peal and stick product has the ability to compress and re-adjust for a permanent perfect fit during construction and when the building settles or moves.

Best Protection available

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Best way to add a flange to any door or window
Whether it is a Patio Door or an Entrance Door lacking a flange makes it nearly impossible to keep moisture out long-term. With this clever product, you can Add-a-Flange to any door and keep it Waterproof.

Helps create a permanent Seal!

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Protect you window frames from rust or corrosion
Window Guard™ is a protective gasket seal designed to separate window or door frames from incompatible materials. Window Guard helps prevent damage to any claded window or door from corrosion and decolorizing from Stucco, Mortar, Cement and Acid based chemicals.

Protect Your Window Frame

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Protect your door from Ross or corrosion
Frame Guard is a protective gasket seal designed to separate door frames from incompatible materials. Frame Guard helps prevent damage to any claded window or door from corrosion and decolorizing from Stucco, Mortar, Cement and Acid based chemicals.

Protect Your Frames From Masonry Damage!

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Flexible counter flashing for doors window or roofs
Counter Flash Guard™ is self-adhering adjustable counter flashing. Composed of hi-density ridged polyethylene polymers, each flashing sheet can be quickly installed due to a series of live, hinges that can conformed to almost any size or shape window and/or door profile.

No Metal Break Needed

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Affordable Flashing Tape
WeatherMax is designed to adhere is super wet conditions, even under water. Avoid weather delays and save money using Weather-Max with Mirco-Grab™ adhesive technology.

Wet OSB, No problem - Max Sticks!

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Window and door tape
Xtreme Weather Flashing Tape is our best air and moisture barrier for around windows and doors.
Alaskan Grade
Micro-Grab™ Adhesive allows it to stick in super cold Weather (-30ºF) and even in wet condition, even underwater.

Find out why contractors everywhere are switching to this incredible tape.

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Best Caulk affordable
ElastoPreme™ is an acrylic urethane elastomeric sealant with 800% elongation. Using advanced sealant technology, ElastoPreme was specially formulated to accommodate extreme substrate movement and shrinkage over long periods of time in construction applications.

800% Elongation

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Best way to seal your brick mold
No Flange on your Brick Moulding - NO Problem. Put away the caulk gun. Brick Mould Seal creates a permanent seal from air and moisture infiltration saving money on utilities and replacement.

Seal Your Brick Mould Permanently!

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Sill Sealers & Weatherstripping

best gasket sealer for windows door

Sill Selaers & Gasket Products

Best Sill Seal
We have designed our sealers and gasket to "Last a Lifetime." All of these products offer superior energy savings and help keep air and moisture out.
Protecto Wrap better than
No other product maximizes a buildings Energy Efficiency more Cost Effectively than Triple Seal Energy Sill Seal. Combining the gasket seal of ENERGY SILL SEAL and the air & moisture barrier protection of MAX-SHIELD, gives you the ultimate protection from air & moisture infiltration that can deplete your building of over 35% of its energy efficiency

Reduce Utility Cost Up To 35%!

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Best Sill Seal
If the gap between the foundation and mud sill/floor deck isn't properly sealed, owners can spend up to 35% more for heating and cooling. Openings in this area are recognized as the number one leading cause for air and moisture infiltration.

Best Sill Sealer on the Market!

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Best Plate seal for sealing wood framing
Caulking this area only allows for moisture to get trap under the plate. Using Energy Plate Seal give a Full SEAL under the entire plate. This innovative gasket system can be used on the second or third floor as well as the first.


Stops Moisture Entering under the Plate!

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Best way to seal slabs with gasket to stop leaks
Uneven concrete slabs create are hard surface to lock out air and moisture at the plate line. Energy Slab Sealer fills in the gaps and stay permanently sealed. Stay Protected!


This Joints Stays Sealed Due to Rebounding Foam!

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Best way to seal plate line and box sill
Max-Shield Perimeter Sill Flash stops air/ moisture infiltration and protect structural framing at the foundation/ wall assembly. This Peel & Stick tape offers super strength and easy application.

Can reduce Utility Costs by 15%

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Protect your window frams from rust or corrosion
Window Guard helps prevent damage to any claded window or door from corrosion and decolorizing from Stucco, Mortar, Cement and Acid based chemicals.

Stop Frame Damage

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Best way to seal door
ThresTite is a permanent gasket seal designed to eliminate air and moisture from entering slab-on-grade door thresholds. This peal and stick product has the ability to compress and re-adjust for a permanent perfect fit during construction and when the building settles or moves.

Best Protection For Under Thresholds!

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Protect your window
Window Guard™ is a protective gasket seal designed to separate window or door frames from incompatible materials. Window Guard helps prevent damage to any claded window or door from corrosion and decolorizing from Stucco, Mortar, Cement and Acid based chemicals.

Protect Your Window Frame

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Energy heals or energy trusses can benefit from this product
Truss-tite is a gasket that is designed as a thermal break for roof trusses. This product creates a thermal break that reduces the flow of energy between the top plate and the roof truss or other truss intersections.

Reduce the Truss Thermal Flow!

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Seal your door brick mould or mold
No Flange on your Brick Moulding - NO Problem. Put away the caulk gun. Brick Mould Seal creates a permanent seal from air and moisture infiltration saving money on utilities and replacement.






Seal Your Brick Mould Permanently!

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Stop corrosion or rust to your steel studs or metal studs
Condensation or any moisture can rust metal studs at the plate line. Stop Rust, Use Metal Stud Protector.

Structure Protect for Pennies.

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Masonry & Concrete

Concrete and masonry products

Masonry & Concrete Products

Best products for concrete Masonary and foundations
These ingenious products help protect, extend life and lower operating cost for concrete and masonry components.
Best way to seal your box sill or sole plate
No other product maximizes a buildings Energy Efficiency more Cost Effectively than Triple Seal Energy Sill Seal. Combining the gasket seal of ENERGY SILL SEAL and the air & moisture barrier protection of MAX-SHIELD, gives you the ultimate protection from air & moisture infiltration that can deplete your building of over 35% of its energy efficiency

Reduce Utility Cost Up To 35%!

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Flexible wall flashing
No Droll, Thru-Wall Flashing protects the wall structure behind brickwork from mold, mildew and decay due to water infiltration.

Stops Moisture Penetration!

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Concrete expansion joint
XpanX Concrete Joint Filler helps prevent concrete from joint cracking and walls and structures from shifting when concrete expands.

Helps Provided a Flexible Seal!

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Footing water stop
WaterStop Transition Boot helps seal off moisture migration through the foundation wall and footing assembly.

Stop Moisture at the Footing Line!

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Best caulk for sealing joint in concrete, wood cement fiber and others
JointLoc™ uses an advanced formula of superior polymer technology. This industrial strength sealant provides superior adhesion even in wet and freezing conditions.

Awesome for Joints

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Decking & Roofing Products

Roofing Products that last

Decking & Roofing Products

Perfect For Parapet Walls

Patio and deck products that stop rot
These cutting-edge protection products extend structural service life and provide long-term assurance.
Reflective paint for roofs
Solar Shield™ Elastomeric Roof Coating is a specially formulated reflective elastomeric roof coating that reflects 93% of infrared rays of the sun and is designed for category 5 weather conditions.

Reduce Roof Temperatures

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Great metal roof caulk that adheres to kynar
MetalLoc™ Sealant uses advanced polymer technology to provide superior adhesion for metal roofing systems.

Excellant Bond to Kynar

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Seals and protect joint on metal duct work
DuctTite™ Metalized Duct Tape is an easy to install duct tape that seals metal joints.

Reduces Energy Loss

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Caulk that elgonates with the roof uto 600%
RoofLoc™ Sealent is specially formulated for final detailing and sealing of any roof penetrations in commercial roof applications. It is an acrylic urethane elastomeric sealant that offers superior adhesion, elasticity and exceptional durability.

700% Elongation

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GripTite roof ice and water protection for eaves and edges
GripTite™ Ice and Water Seal is an anti-skid cross laminated re-enforced roofing membrane. GripTite provides an additional layer of waterproofing protection to vulnerable roof areas.

Perfect For Parapet Walls

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Seals bricks and other masonry products including parapet walls
DriMax™ is a special formulated clear water base sealer designed to offer long-term waterproofing protection. DRIMAX is a silicone/silane transparent waterproofing sealer and provides superior protection from wind driven rain on almost all porous masonry surfaces.

Perfect For Parapet Walls

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Waterproof your deck ledger or ledger board with this flashing tape
Deck Ledger Flashing is a self-adhering counter flashing for the deck ledger board. This flashing tape waterproofs the transition between the house and the deck.

Waterproofs the Deck Ledger

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Protect your joist from moisture, decay and rot
Joist Protector™ is a joist and pier cap system designed to protect and lengthen the life of your deck. Made from a recycled polyethylene material that provides a waterproof membrane.

Prevents Deck Rot

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Deck Trim
DurX™ Deck Trim is made from a waterproof, UV resistant composite sheeting. This product is extremely durable and corrosion, rot resistant yet extremely lightweight

Cut to Fit

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Seal your deck with the best sealer
WateRepel™ is a special formulated clear water base sealer designed to offer long-term waterproofing protection. WateRepel is a silicone/silane transparent waterproofing sealer and provides superior protection from wind driven rain on almost all porous masonry surfaces.

Clear, Fast Drying

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Caulks & Sealants

Best Caulk and Sealants

Caulks & Sealants

Flexible Caulk and sealants
Our high performance sealants are designed to withstand extreme substrate shrinkage and movement.
Best caulk for sealing joint in concrete, wood cement fiber and others
JointLoc™ uses an advanced formula of superior polymer technology. This industrial strength sealant provides superior adhesion even in wet and freezing conditions.

Awesome for Joints

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Caulk that elgonates with the roof uto 600%
RoofLoc™ Sealent is specially formulated for final detailing and sealing of any roof penetrations in commercial roof applications. It is an acrylic urethane elastomeric sealant that offers superior adhesion, elasticity and exceptional durability.

700% Elongation

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Great metal roof caulk that adheres to kynar
MetalLoc™ Sealant uses advanced polymer technology to provide superior adhesion for metal roofing systems.

Excellant Bond to Kynar

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Professional Grade Caulks and Sealants
This Pro Formula™ Sealant passes the contractor test for reliability in a door and window caulk. As structures move and settle, ElastoPreme is designed to stay flexible and remain waterproof.

800% Elongation

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Waterproofing Products

Waterproof wood concrete metal canvas

Waterproofing Products

Seal concrete or seal wood deck
Our Foundation products cover a wide range of innovations that can help save time and future utility cost for the building owner.
Stop the dusting by sealing your concrete
Prime and Seal your concrete and extend the life. Stop the chalking that can damage concrete.

Lock Down the Quality

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Seal Your Deck
From Canvas to Concrete, WateRepel can seal almost anything. This green product maybe the best waterproofer on the market.

Waterproof almost anything.

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Sela Brick or Stone
Seals and protects masonry from water infiltration.

Great for Parapet Walls!

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Best way to seal concrete deep penetration
Compared to most lithium densifiers that only penetrate into the concrete 2" to 3", LITHIFIER™ permeates up to 7" deep. LITHIFIER is the safest and most cost effective way to prevent a damp, musty and an unhealthy basement environment.

Protect your Concrete from Moisture Damage

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Specialty Products

Cutting Edge Building Products

Specialty Products

Best New Products
This collection of varied products offers innovative solutions with a wide array of features and benefits.
Protect your wood floors from foot traffic
Scuf-Tuf™ Wood Floor Protection is a special formulated film designed to bond to surfaces without the use of adhesive so no residue is left embedded in the floor.

Great Protection from Foot Traffic

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Energy seperator for wood or metal trusses
Truss-tite is a gasket that is designed as a thermal break for roof trusses. This product creates a thermal break that reduces the flow of energy between the top plate and the roof truss or other truss intersections.

Reduce the Truss Thermal Flow!

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Protect your carpeting even in your car truck
Kling-Tite™ Super Surface Protection is a special formulated film that has the ability to cling to most surfaces securely without the use of adhesive.

Adhesive Free!

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New Products

Best new Construction Products
watch for new products

Cutting Edge Liquid Flashing
“superior in every way”

Flex Flashing Tape
“the one to beat”

Contruction or building products that are new

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Made in USA
WEATHER-BLOC Systems has spent the last 20 years developing new products to improve upon the quality and efficiency of products that have been offered to the construction industry that do not offer any long-term protection or maximize a buildings efficiency. Because of this, home owners spend billions of dollars each year in premature costly repairs and increased utility cost for the life of the structure.
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8536R W. National Ave.
West Allis, WI 53227
414-375-8101