Internal Manhole Sealing

Manhole Rehabilitation And Adjustment Ring Sealing Specialty

The most cost effective trench-less solution to prevent inflow and infiltration in the most difficult joint sections and upper adjustment ring areas of manholes. No confined space entry necessary!

SIMPLE 1-2-3 INSTALLATION METHOD

1. Prime with Permaflex

2. Apply LRB-TAV Mixture Reinforcement to Profile All Cracks & Joints

3. Apply Top Coat of Permaflex

This three-step process assures that every crack, hole, joint and crevice is permanently sealed. Experience has proven that a simple single application of something is usually not worth the effort it takes to apply it. By using the SANI-TRED three-step process you are triple protected and assured that all joint imperfections are filled and sealed the first time for the last time!

SANI-TRED products have passed over 10 years of field testing and research in underground water vessels such as manholes, basements, deep cisterns, waste water treatment tanks, elevator pits and swimming pools. This field testing and research is coupled with a rigorous independent testing regimen designed by "The American Society of Testing and Materials, or (ASTM). These independent tests have proven that a SANI-TRED product manhole installations exceeds the minimum requirements for negative pressure retention in US manholes by almost ten times!

• Negative Hydrostatic Vacuum ASTM C-1244 RESULTS 5 min. @ 12 in.
• Negative Hydrostatic Air Pressure Rev. ASTM C-1244 RESULTS 5 min. @ 10 lbs.

Constant hydrostatic pressure from the side walls, along with heavy vehicle traffic pounding will never detach SANI-TRED products. They will not peel, blister, chip, delaminate, or detach from concrete, cast iron, concrete block, mortar, in the constant presence of negative hydro-static water pressure on  the coating's  "raw edge"

How & Why SANI-TRED Works Inside

SANI-TRED products maintain permanent flexibility and never harden or become brittle, they only become stronger with age. SANI-TRED Permaflex, (liquid rubber primer and top coating), deep penetrates into the pores of the coated substrate and produces tiny "solid rubber sealing plugs". These "tiny plugs" or "capillary filled sealing tentacles" in each and every pore or crack in the substrate surface holds back and retains ground water pressure before it has a chance to reach the SANI-TRED coating surface to "push it off" it in mass as with all other types of coatings. These penetrated sealing  tentacles work like tiny, high pressure, hydraulic, o-rings! The tentacles seals, anchors and locks the coating membrane surface to the substrate such as concrete, block, or mortar joints, the areas of greatest porosity in a foundation wall.

The photos below show a concrete patio block that was laid horizontally and coated on one side with SANI-TRED PermaFlex. The PermaFlex was reduced with Xylene (solvent) to allow quicker and deeper penetration. Once this coat was completely saturated, more was applied, and repeated. The PermaFlex was tinted red to allow better visual detection of the SANI-TREDs’ microscopic penetration process of Flexible Penetration Technology®. The block was then broken in half to show its internal cross section. Notice the penetration of the red PermaFlex throughout the entire block.

Permaflex "deep penetration,  o-ring fingers" seen here  penetrating  about 1-1/2"

Understanding the Relationship of Pressure and Coating Surface Area

The more the tiny, Permaflex flexible, rubber tentacles are compressed by ground water pressure the greater the seal! It's a mechanical fact that the smaller the diameter of a tube, pipe, hose etc, the greater the pressure force it may retain.

Example: a specific length of seamless copper tubing 1/8" in diameter with a wall thickness of .065" is rated to handle up to 3,675 pounds per square inch of pressure, (psi). On the other hand, the exact same length of copper tubing with a much larger diameter of  2"  with the exact same .065" wall thickness is rated to handle only 299 (psi) explained by the formula illustrated below. courtesy: "American Society of Mechanical Engineers" Code for Pressure Piping (ASME B31):

• WHERE: P = allowable pressure, psi
• S = maximum allowable stress in tension, psi
• tmin = wall thickness (minimum), in.
• Dmax = outside diameter, in.
• C = a constant

 This example may help you to understand the waterproofing "over kill" significance and strength of SANI-TRED products. This should also help to illustrate why it is necessary to reinforce large cracks, holes, and joints  with our "adhesive rubber caulk" known as LRB and TAV mixture to work with the pressure retention abilities of the Permaflex primer which handles the small or microscopic levels of sealing and adhesive bonding to the substrate. NEVER USE CEMENT BASED PATCHING MATERIALS! The SANI-TRED basement waterproofing system relies upon the application of LRB and TAV mixture to reinforce Permaflex  in large holes, cracks, joints and other such larger potential and visible leaking areas allowing Permaflex to handle the tiny microscopic potential leaking areas. 

SANI-TRED Permaflex obviously cannot penetrate  materials such as native stone, fired brick, ceramic tile, steel, cast iron or other non-porous materials but does produce an excellent adhesive bond to these common building materials. This is especially true when these types of non-porous building materials are incorporated in a concrete or mortar jointed foundation wall such as iron pipe through a poured concrete wall or a stone foundation. The use of  SANI-TRED Permaflex primer with LRB and TAV mixture effectively seals these normally difficult to waterproof areas.

Longevity and SANI-TRED Manhole Rehabilitation

Polyurethane molecules or artificial rubber are among the most complex molecules known to man. This is what allows the flexible nature of the material and provides it's remarkable durability.  Since the early invention of the automobile there has been an effort effort to find a good way to dispose of old tires. Old worn-out  tires have been directly buried in the earth for over 100 years, unearthed, only to discover that they were in as good condition as when originally buried! 

By these observations scientists have determined that the best possible environment to keep and maintain rubber products, both natural or artificial, is to keep them in a damp environment in the absence of UV exposure. Under these conditions it has been determined that natural or  artificial rubber will last virtually forever without breakdown or deterioration. These are virtually the same conditions found inside a manhole. This is only one of the many reasons we can so confidently make the statement "permanently waterproof manholes" and you can have confidence in that statement for your manhole rehabilitation projects.

The oldest SANI-TRED installation, an outdoor commercial floor surface, is nearly 18 years old in a heavy foot traffic, UV exposure,  environment with no signs of breakdown or substantial wear.

Ideal Products is under contract not to supply SANI-TRED products to manhole sealing customers in the United States and Canada. Similar opportunities are available in other territories and countries world wide.