ALL PURPOSE LIQUID WATERPROOF DECK MEMBRANE COATING

$485.00
SKU:
LWPMEM
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Extra Heavy-Duty Liquid Waterproof Membrane

ArmorGarage has developed a versatile liquid waterproof membrane coating that can be applied to virtually any surface—indoors, outdoors, horizontal or vertical surfaces, above or below grade. This exceptional product solves everyday problems: leaky roof decks, leaking basement floors & walls, slippery and hot pool decks.

1300% Stretch Factor
5X Thicker Than Standard
10 PSI Leak-Stopping Power

Versatile Problem Solver

  • Leaky Roof Decks: Seals wood, concrete, or tiled surfaces
  • Pool & Pool Decks: Waterproofs and provides slip-resistant finish
  • Planters: Stops leaks in planter boxes and containers
  • Below-Grade Walls: Seals basement walls with up to 10 PSI leak-stopping power
  • On-Grade Floors: Prevents moisture from coming up through your slab, great for basements with high water levels.
  • Fish Ponds: Nontoxic formula safe for aquatic life

Waterproof just about any application with a decorative finish—available in 14 different colors. Eliminates the need for paint!

Exceptional Performance Characteristics

Amazing molecular cross-linking allows our coating to stretch by a factor of 1300%! 5X thicker than standard waterproof paints available at home improvement stores and 10X as durable.

  • Breathable Technology: Lets vapor through but not moisture—prevents mold, mildew, and delamination
  • Crack Sealing: Seals cracks in vertical or horizontal applications unlike standard paints
  • Universal Adhesion: Adheres to virtually any surface type that needs waterproofing
  • Low VOC: Almost no odor, safe for indoor use
  • Fast Drying: Dries in one hour per coat @ 72°F. Light traffic in 24 hours.
  • Full Cure: 2-5 days depending on conditions
  • UV Stable: Color-fast finish resists fading

Application Methods

Applied with brush, roller, or spray. Any airless sprayer with tip size 17-21 and PSI of 2500min-3300max can be used for spray application.

Minimum two coats required. Additional coats can be applied for added protection. Nonskid aggregate can be broadcast into wet base coat, then covered with second coat to reduce slippage.

Perfect Standalone Solution

Ideal for outdoor tiled, wood, or concrete substrates on roof decks above occupied areas. Functions as both waterproof membrane and finished surface with aesthetic color. For additional protection, apply Armor Shield Topcoat.

Waterproof membrane coating on roof deck with decorative finish

Waterproof Base Layer Application

Can also be used as a waterproof layer on roof decks or balconies that will have tiles, pavers, or wood flooring applied over it. Solves the persistent problem for homeowners and businesses requiring a finished floor over waterproof protection.

Super Durable with High Abrasion Rating: Handles deck chairs and tables, high foot traffic as a finished coating—or provides robust protection under pavers, tiles, and wood flooring.

Application Details

  • Coverage: Minimum two coats required
  • Dry Time: Touch-dry in ~1 hour at 70°F
  • Full Cure: 2-5 days depending on temperature and humidity
  • Color Options: 14 colors available
  • Lead Time: 5-7 business days for delivery
  • Lighter Colors: May require additional coats for opacity

For Textured Finish: See last photo in product gallery above.

For Extra Heavy-Duty Protection: Use 1 gallon of topcoat for every 2 gallons of membrane.

QUANTITY DISCOUNT ON 1500 SQ FT OR MORE

Request a Quote

Sample Pint Available: Call our office to order a sample for just the cost of shipping. 

5-Year Warranty!

Lighter colors may have bleed through from darker colors underneath. Order optional high pigmented topcoat to resolve this issue.

Membrane Coating Color Chart

Click chart to zoom in

🔍 Click to Zoom ArmorGarage Membrane Coating Color Chart

Colors shown are approximate — actual coating colors may vary slightly from screen display.

Minimum of two coats are required and you will get more coverage with the second coat. So on average you will get about 200 sf/gal over concrete and wood and 300 sf over nonporous surfaces such as tiles.

 

This product is designed to be applied in multiple thin coats, too thick a coat will cause product not to cure which is not covered under the warranty. Better to apply 3 or 4 coats than 2 coats that are too thick.

 

Waterproof Liquid Membrane Application Instructions

Complete step-by-step guide for applying Liquid Membrane on concrete, wood, masonry, decks, roofs, and below-grade surfaces.

STEP 1  —  Surface Preparation

All surfaces must be clean and dry before application. Proper preparation is the most important factor in coating performance and longevity.

Preparation by surface type

Wood: Clean with deck cleaner. Sand new wood to remove mill finish. Remove all loose or flaking coatings.

Concrete / Masonry: Use a concrete etching product to open pores and ensure proper adhesion.

Previously Coated: Can be applied over latex or epoxy coatings. Epoxy coatings must be sanded to roughen the surface.

Do not apply over petroleum-based coatings. All petroleum-based coatings must be completely removed before application.

Application temperature: 35–90°F. Do not apply outside this range.

STEP 2  —  Crack & Joint Repair

Repair method by crack size

Up to 1/8": No repair needed — coat directly over.

1/8" – 1/4" deep: Fill with foam backer rod or compacted sand, then coat over.

1/4" – 5/16" wide: Fill with Sikaflex 1A caulk (available at home improvement stores) to just below the surface. Allow to cure per manufacturer instructions.

Larger cracks (concrete): Use a quality concrete floor patch material.

Larger cracks (wood): Use paintable wood putty or Bondo.

After filling cracks: Apply a coat of Liquid Membrane over the repair and let dry 45–60 minutes. Apply a second coat. Add additional coats as needed until the repair is flush with the surrounding floor.

STEP 3  —  Applying the Liquid Membrane

Once the floor is fully prepped, apply Liquid Membrane with a 1/2" nap roller at the appropriate coverage rate:

Porous surfaces (bare concrete, raw wood): 125–150 sf/gal

Most typical surfaces: 200–250 sf/gal

Do not apply too thick. Thicker applications can prevent the product from curing properly. This product is designed to be applied in thin coats. It is always better to apply multiple thin coats than one thick coat.

Coats required by application type

Above grade (decks, balconies, patios): 2 coats minimum (3rd & 4th optional for thicker coverage). Full cure: 2–5 days.

Below grade & submerged (foundations, pools, planters): 3 coats minimum. Full cure: 7 days before backfilling or filling with water.

Between coats: Allow each coat to dry approximately 1 hour. The coating should be dry to the touch and not leave any fingerprints when pressed.

After final coat: Inspect for any pinholes, bubbles, or other defects. Repair by applying additional Liquid Membrane to affected areas.

STEP 4  —  Topcoat Application (Optional)

Allow the final membrane coat to fully cure before applying topcoat.

Coverage rate: 250 sf/gal in one coat

Purchase ratio: 1 gallon of topcoat for every 2 gallons of membrane

STEP 5  —  Deck & Structure Joints (Cant Strip Method)

Joints between a deck and a wall or structure require special treatment to ensure a proper waterproof seal. A simple 90-degree joint does not allow enough material to be applied for reliable protection.

How to install a cant strip:

1. Apply a generous amount of construction adhesive at the joint where the deck meets the structure.

2. Embed the cant strip (available at home improvement stores) into the adhesive.

3. Allow to cure overnight.

4. When coating the deck, apply the membrane over the cant strip and continue 4–6" up the wall of the structure.

Always use a cant strip when coating a deck, roof, or balcony. The angled joint provides far better material coverage and waterproofing than a standard 90-degree corner.

STEP 6  —  Spray Application (Alternative Method)

Liquid Membrane can also be applied using an airless sprayer for larger areas:

Sprayer pressure: 2,500–3,300 psi

Flow rate: 0.95–1.6 GPM capacity

Tip size: 0.521 or 0.631 reversible tip

Max hose length: 100 ft at 3/8" diameter

STEP 7  —  Cleanup

Clean tools and spills with soap and water. Clean up before the product dries for easiest removal.

★  Quick Reference Summary

Application temperature: 35–90°F

Roller type: 1/2" nap roller

Coverage (porous surfaces): 125–150 sf/gal

Coverage (typical surfaces): 200–250 sf/gal

Dry time between coats: ~1 hour (dry to touch, no fingerprint)

Coats — above grade: 2 minimum (up to 4)

Coats — below grade / submerged: 3 minimum

Full cure — above grade: 2–5 days

Full cure — below grade / submerged: 7 days

Topcoat coverage: 250 sf/gal (1 coat)

Topcoat ratio: 1 gal topcoat per 2 gal membrane

Cleanup: Soap and water

Questions about your project?

Our team can help you determine coverage, and application for your specific application.

Call Us

866-532-3979

Email Us

info@armorgarage.com

DOWNLOAD TDS

Related Products

Custom tab 1

Lighter colors may have bleed through from darker colors underneath. Order optional high pigmented topcoat to resolve this issue.

Membrane Coating Color Chart

Click chart to zoom in

🔍 Click to Zoom ArmorGarage Membrane Coating Color Chart

Colors shown are approximate — actual coating colors may vary slightly from screen display.

Membrane Coating Color Chart

Click chart to zoom in

🔍 Click to Zoom ArmorGarage Membrane Coating Color Chart

Colors shown are approximate — actual coating colors may vary slightly from screen display.

Custom tab 2

Minimum of two coats are required and you will get more coverage with the second coat. So on average you will get about 200 sf/gal over concrete and wood and 300 sf over nonporous surfaces such as tiles.

 

This product is designed to be applied in multiple thin coats, too thick a coat will cause product not to cure which is not covered under the warranty. Better to apply 3 or 4 coats than 2 coats that are too thick.

 

Custom tab 3

Waterproof Liquid Membrane Application Instructions

Complete step-by-step guide for applying Liquid Membrane on concrete, wood, masonry, decks, roofs, and below-grade surfaces.

STEP 1  —  Surface Preparation

All surfaces must be clean and dry before application. Proper preparation is the most important factor in coating performance and longevity.

Preparation by surface type

Wood: Clean with deck cleaner. Sand new wood to remove mill finish. Remove all loose or flaking coatings.

Concrete / Masonry: Use a concrete etching product to open pores and ensure proper adhesion.

Previously Coated: Can be applied over latex or epoxy coatings. Epoxy coatings must be sanded to roughen the surface.

Do not apply over petroleum-based coatings. All petroleum-based coatings must be completely removed before application.

Application temperature: 35–90°F. Do not apply outside this range.

STEP 2  —  Crack & Joint Repair

Repair method by crack size

Up to 1/8": No repair needed — coat directly over.

1/8" – 1/4" deep: Fill with foam backer rod or compacted sand, then coat over.

1/4" – 5/16" wide: Fill with Sikaflex 1A caulk (available at home improvement stores) to just below the surface. Allow to cure per manufacturer instructions.

Larger cracks (concrete): Use a quality concrete floor patch material.

Larger cracks (wood): Use paintable wood putty or Bondo.

After filling cracks: Apply a coat of Liquid Membrane over the repair and let dry 45–60 minutes. Apply a second coat. Add additional coats as needed until the repair is flush with the surrounding floor.

STEP 3  —  Applying the Liquid Membrane

Once the floor is fully prepped, apply Liquid Membrane with a 1/2" nap roller at the appropriate coverage rate:

Porous surfaces (bare concrete, raw wood): 125–150 sf/gal

Most typical surfaces: 200–250 sf/gal

Do not apply too thick. Thicker applications can prevent the product from curing properly. This product is designed to be applied in thin coats. It is always better to apply multiple thin coats than one thick coat.

Coats required by application type

Above grade (decks, balconies, patios): 2 coats minimum (3rd & 4th optional for thicker coverage). Full cure: 2–5 days.

Below grade & submerged (foundations, pools, planters): 3 coats minimum. Full cure: 7 days before backfilling or filling with water.

Between coats: Allow each coat to dry approximately 1 hour. The coating should be dry to the touch and not leave any fingerprints when pressed.

After final coat: Inspect for any pinholes, bubbles, or other defects. Repair by applying additional Liquid Membrane to affected areas.

STEP 4  —  Topcoat Application (Optional)

Allow the final membrane coat to fully cure before applying topcoat.

Coverage rate: 250 sf/gal in one coat

Purchase ratio: 1 gallon of topcoat for every 2 gallons of membrane

STEP 5  —  Deck & Structure Joints (Cant Strip Method)

Joints between a deck and a wall or structure require special treatment to ensure a proper waterproof seal. A simple 90-degree joint does not allow enough material to be applied for reliable protection.

How to install a cant strip:

1. Apply a generous amount of construction adhesive at the joint where the deck meets the structure.

2. Embed the cant strip (available at home improvement stores) into the adhesive.

3. Allow to cure overnight.

4. When coating the deck, apply the membrane over the cant strip and continue 4–6" up the wall of the structure.

Always use a cant strip when coating a deck, roof, or balcony. The angled joint provides far better material coverage and waterproofing than a standard 90-degree corner.

STEP 6  —  Spray Application (Alternative Method)

Liquid Membrane can also be applied using an airless sprayer for larger areas:

Sprayer pressure: 2,500–3,300 psi

Flow rate: 0.95–1.6 GPM capacity

Tip size: 0.521 or 0.631 reversible tip

Max hose length: 100 ft at 3/8" diameter

STEP 7  —  Cleanup

Clean tools and spills with soap and water. Clean up before the product dries for easiest removal.

★  Quick Reference Summary

Application temperature: 35–90°F

Roller type: 1/2" nap roller

Coverage (porous surfaces): 125–150 sf/gal

Coverage (typical surfaces): 200–250 sf/gal

Dry time between coats: ~1 hour (dry to touch, no fingerprint)

Coats — above grade: 2 minimum (up to 4)

Coats — below grade / submerged: 3 minimum

Full cure — above grade: 2–5 days

Full cure — below grade / submerged: 7 days

Topcoat coverage: 250 sf/gal (1 coat)

Topcoat ratio: 1 gal topcoat per 2 gal membrane

Cleanup: Soap and water

Questions about your project?

Our team can help you determine coverage, and application for your specific application.

Call Us

866-532-3979

Email Us

info@armorgarage.com

DOWNLOAD TDS

Custom tab 4

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