Featured Best Sellers

Here we feature our most popular installation supplies, for Installers, Professional Contractors and DIY’ers.

You require building materials you can depend on and know will allow you to complete a project
in full confidence. Sealants that are easy to use, easy to clean and
will give your installations the long lasting seal you and your customer depend on.

You need affordable prices that will allow your projects to be more cost
effective.

MK Building Materials has “Your best
prices for cases of Sealants, Insulation Foam, Vinyl Flat Trim, Coil Rolls and
Mouldings.

We Offer items by the Case,
Multi-Cases, Pallets and ½ Pallets.

Ask us about our tiered volume discounts when you know you’ll need many cases.

Call Us Now For a Quote: 714-822-1875 or 714-660-6062

BOSS ® 125 MULTI-SEAL

14 Colors

A Hybrid multi-purpose, one part sealant, formulated with USP™ Technology to form a highly durable, flexible seal. This unique sealant offers outstanding primerless adhesion to most common building materials including vinyl, aluminum, steel, concrete, wood, glass and asphalt shingles.

9.5 oz. Cartridge & 20oz Sausage

Windows, Doors, Gutters, Metal, Flashing, Wood,

Masonry, Joints.

All weather plastic cartridge ·
Applies the same in all seasons ·
Bonds to wet, damp surfaces ·
VOC Compliant ·
Bonds to Kynar 500*
Paintable in under an hour.
Test small area for compatibility before painting, Translucent not paintable.

Link to short Boss125 Rain Simulator video:

BOSS ® GUN FOAM CLEANER

Specially developed to clean the PU foam applicator guns.
A Correct cleaning of the gun and the proper use of the product will ensure an optimal function and prevent blockage of the applicator gun.
Suited for cleaning of the valve and spray nozzle of PU foam canisters and removing uncured PU foam.

12 oz. Gun Can

Soudal® DOOR & WINDOW FOAM

Formulated with CFC free propellant. A one component, self expanding, ready to use polyurethane foam, with a plastic adaptor head for use with a foam applicator gun which contains propellants which are completely harmless to the ozone layer.

AAMA 812-04 Approved
24 oz Can Gun Foam

GENIUS GUN PATENT NO. 1010639

Filling of cavities
Creation of a soundproof screen
Installing of window and door frames
Sealing of all openings in roof construction
Mounting and sealing of window and door frames
Connecting of insulation materials and roof construction
Application of a soundproofing layer on motors
Improving thermal isolation in cooling systems

OSI H2U

Clear & White

When it comes to sealing seams and cracks around windows, doors and siding, H2U’s advanced formula delivers better adhesion, flexibility and durability than most sealants in its class. Formulated for flexibility, it provides 25% joint movement -- making it ideal for new construction that will likely experience settling. Made of a UV and water-resistant formula, H2U will not crack or yellow. It is dust- and dirt-resistant, cleans up easily with soap and water and paintable when fully cured. Ideal for both indoor and outdoor use.

10 oz. Cartridge

Windows, Doors, Siding & Trim Sealant.

GreenGuard Certified
Perfect for interior window seals
Dust & dirt resistant
Available in clear or white
Easy water clean up

BOSS® 385 Silicone

Clear & White

Plumbers 100% RTV Professional Grade

Maximum Performance Silicone

The Gold Standard

A premium Tub & Tile Plumbers 100% RTV silicone is a one-part, fungicidal, silicone rubber sealant, designed to seal nonporous surfaces around ceramic tile, showers, tubs, sinks and plumbing fixtures where conditions of high humidity and temperature extremes exist.

9.5 oz. cartridge

This product is mildew resistant for

use in moist or humid locations such

as bathrooms and lavatories.

Mildew resistant, non-yellowing silicone
Waterproof and remains Permanently flexible.
Use around the toilet base, showers, sinds, bathtubs and tiles.
Excellent for gluing ceramic and
porcelain tiles and tub surrounds to the wall.
Cures to a tough, rubbery solid at room temp.
Excellent resistance to weather, temperature extremes, and caustic environments
Plumbing Fixtures
Painted Areas
Flexible, mold-resistant seal
Excellent adhesion to glass.
Remains Flexible
VOC Compliant
Resists Moisture/ Staining/Spotting.
Resists Humidity & Temp Extremes.

BOSS® 363 SEALANT

White & Clear

Acrylic Latex With Silicone.

Designed for both interior and exterior use. Forms a tough, flexible, resilient bond to all building material surfaces. It has excellent resistance to water, weathering and moisture vapor. Cures to produce a flexible seal that is non-yellowing.

9.5 oz. cartridge

"Painters Caulking." Wood, Masonry, Concrete,Brick

Drywall, Metal, Glass.

Sealing around window and door frames
Sealing around baseboards
Sealing around trim
Sealing anywhere a weathertight seal is desired
Sealing corner joints
Sealing where siding meets trim

BOSS® 185 Multi-Seal

Outstanding Bond Strength

White

A one component, high performance adhesive/sealant formulated with USP™ technology. Provides excellent durability, maximum adhesive strength and is VOC compliant in 50 states. It is color stable and UV resistant (non-yellowing) and contains no isocyanates solvents halogens or acids. It is a moisture curing sealant that remains flexible, even at low temperatures with quick grab strength and excellent adhesion to various substrates such as aluminum, steel, glass, wood, brick concrete, mirrors and many plastics. It is also paintable with most latex paints.

9.5 oz. Cartridge

Fast Cure
Quick Grab
Formulated with USP™ Technology
VOC Compliant
UV resistant and color stable
Paintable with most latex paints
Can be applied on wet surfaces
Great For:
** Aluminum, Steel, Glass, Wood, Brick Concrete, Mirrors, Many Plastics.

BOSS® 399 Silicone

Water Proof SEAL

Clear & White

A one part, neutral curing, medium modulus sealant formulated for window and door glazing market. It offers a primerless adhesion to vinyl, wood, aluminum and Kynar 500®

10.1 oz. Cartridge

100% Glazing - Professional Grade
Formulated for the WIndow & Door Glazing Market
VOC Compliant in all 50 States
Low Odor
Excellent backbedding Sealant
Medium Modulus
Primerless Adhesion
Bonds to Kynar 500®

BOSS® 850 Colors

Trans White

Color Matching Silicone for Surfaces

9.5 oz. Cartridge

Mildew Resistant
Excellent Adhesion
Remains Flexible
Will Not Shrink
Adheres To Many Nonporous Surfaces
Excellent for sealing and waterproofing shower-tub enclosures, tubs, sinks and around urinals
Ceramic Tile Grouting
Seals Cultured Marble or Natural Stone and Granite Seams
Excellent for Sealing Back Splashes in Bathrooms or Kitchens
Great for adhering cultured marble panels to sheet rock
Meets FDA/USDA requirements for use in establishments operating under Federal Meat and Poultry Inspection Program.

Great for:

Cultured Marble, Glass, Countertops, Natural

Stone, Granite, Porcelain, Painted Surfaces,

Plumbing Fixtures,

Soudal/BOSS® Family

Multiple Applications

Polyurethane/Silicone for a Variety of Applications

Cartridge & Sausages available.

BOSS Pro Family of Sealants for All your Building Material Needs.

Fire Stop Sealant and Gun Foam
Elastomeric Sealant 100% Flexible.
Building and Construction Joints
Kitchens & Bathrooms
Windows and Doors. Inside & Out.
Windows & Door Gun Foam
Foam & Gun Foam Cleaner
Tube, Shower and Tile.
Gutters, Roofing.
Mirrors and Glass
Countertops, Stone, Concrete, Marble, Porcelain sealants.
Polyurethanes
Silicones
Wood, Baseboards, Windows & Door casing
Plumbing Fixtures
Polyurethane's
Silicone's
Perfect long lasting sealants for virtually all your building and remodeling needs.