#1 Alternative to Deck-O-Seal

Save Hundreds &
Do It Yourself

Don’t waste money on a service industry guy to replace your mastic,
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What's  Pool Seal™

Pool Seal™ sets a new standard for swimming pool mastic or expansion joint sealant. Finally an alternative to, Deck-o-Seal®

A 2 part poly activated compound, which forms a lasting seal, repairable , natural looking (with our exclusive topping) seal between your pool coping stone and deck.

An absolute value over the industry’s product of choice, Pool Seal™ last’s for years,  solve your pool deck coping sealant problems easily and economically with Pool-Seal.

Created exclusively for the pool owner in mind to “Protect Your Pool Today & Protecting Your Cash from the Industry Forever” .


To offer the Do It Yourself minded homeowner an inexpensive way to repair the pool mastic around their pool. The stuff that’s between the coping stone and your deck, it has a lot of names pool caulk, pool grout, pool mastic and so on. The industry widely chooses to use Deck-o-Seal mainly because the single major swimming pool wholesaler SCP only carries Deck-o-Seal in their inventory. Deck-o-Seal also is very difficult to work with it has a fast pot time. Which means it sets up very fast and the hotter it is the faster it sets up. Generally speaking, you NEVER use 100% of the 96oz you purchased. With that being said it’s NOT the only game in town


Polyurethane – Based Joint Sealant

POOL-SEAL SL5 a two-part, elastomeric, polyurethane-based joint sealant designed for concrete and stone expansion joints. POOL-SEAL SL5 is used for caulking and sealing joints subject to concrete movement to provide a firm, flexible, weather-tight seal. Ideal for sealing joints around swimming pools, and is applicable for both interior and exterior use.

  • Provides permanent and uniform watertight seal.
  • Topping Stones included to provide attractive look and will not allow discoloration of seal from the sun.
  • Prevents uncontrolled cracking by allowing expansion and contraction during temperature changes.
  • Stays flexible … won’t become brittle or crack due to ultraviolet exposure.
  • Not affected by pool chemicals.
  • Retains joint soundness in service once it’s cured and can be stretched or compressed up to 50% without tearing away from edge (if installed ½ inch deep)


Polyurethane -Based Joint Sealant


Pool-Seal SL7 is a single component (NO MIXING REQUIRED), self-leveling, premium-grade polyurethane sealant with an accelerated curing capacity.

  • 1-component, NO MIXING REQUIRED
  • Self-leveling, pourable
  • Accelerated curing
  • Extremely elastic & High durability
  • Resists aging and weathering
  • Excellent adhesion
  • Convenient, easy-to-use packaging
  • Not affected by pool chemicals.


Meet A Few Of Our Happy Customers:

Got this instead of deck o seal.  Glad I did. It was easy and works as published so far. Looks great.

Jim R.

Burleson, TX

Pancakes! As easy as making pancakes! I have a 20 year old pool and the mastic around the coping has shrunk and separated from the concrete. I called the pool company to get an estimate of repair and what kind of product they used. To save a lot of money I searched the internet and tried Deck-O-Seal. I followed the instructions and the product never set and I had to remove it (what a hassle), the company blamed it on the batch being expired. I got full refund and then ordered Pool Seal. I spoke with Robert first explaining my prior dilemma. He assured me this would not happen. I received my Pool Seal and it was as easy as making pancakes, just mix and pour, then sprinkle and I was done. Sets up within 8 hours, Awesome product!

Mike V.

Riverside, CA

This material is awesome!  The kit could not be more user friendly to use with step by step easy instructions.  The stones I ordered were even delivered in a easy application bottle so I would not make a mess.  End product looks great and functions really well.  I had a thin spot and easily repaired it with the extra material I had.  I highly recommend this product to anyone.  My pool builder and cleaner are very impressed with the product too!

Steven S.

Carlsbad, CA


If you want to hire a professional to seal your pool, we can also come to you.

Pool-Mastic serves the Dallas area.

Contact for a quote.

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Save Money and Do It Yourself