External Manhole Frame/Chimney Seal
MarMac SurSeal provides a permanent, flexible, watertight seal between manhole castings and concrete cones. It combines the advantages of a mechanical seal with the added assurance of a pliable gasket. Its ease of installation & low cost makes SurSeal one of the best options available.
SurSeal is easy to install and designed for simple readjustment when/if grades are required. No special tools, primers, or torches are required for installation. The same tool used to tighten pipe to manhole connectors and flexible couplings is used to tighten the top and bottom bands of SurSeal.
SurSealʼs top band compresses the pliable rubber gasket component, uniformly filling the annular space, forming a gasket seal to the top,
bottom, and outside edges of the frame’s base flange. The band’s “C” shape mechanically locks the seal on the manhole casting. The flat bottom band compresses the pliable gasket component against the top of the concrete cone, instantly filling any minor voids or irregularities.
Features & Benefits
- Permanent & flexible
- Easy to install; no special tools, primers, or torches required
- High performance
- Low cost
MarMac SurSeal should be stored in a dry, cool place.
|Service Temperature Range||-40 °F||250 °F|
|Application Temperature||20 °F||120 °F|
|Specific Gravity||1.16||ASTM D1475|
|Solids Content||75 %||ASTM C681|
|Sag or Flow||0.05″||ASTM D2202|
|Press-Flow Viscosity||55 sec||ASTM D2452|
|Flash Point||48 °F||ASTM D56|
|VOC Content||330 g/L||ASTM D3960|
|Shear Strength||25 psi||ASTM D1002|
|Tensile Strength||25 psi||ASTM D638|
|Elongation||140 %||ASTM D638|
|Shore A Hardness||8-12||ASTM C661|
|Shore 00 Hardness||50-55||ASTM C661|
|Resistance to 5% (nitric, sulfuric, & hydrocloric acid)||Excellent- No effect after 30 day immersion||ASTM D545|
Provide a minimum 3/8″ space between the frame and the top adjusting ring, or cone, with two rows of 3/4″ x 3/4″ preformed butyl rubber rope.
To insure a proper seal, clean the edge of the manhole casting and the vertical portion of the cone with a wire brush and remove any resulting residue from the surface. Sealing areas need to be reasonably smooth and free from gross imperfections (some imperfections may require the use of butyl rubber caulk as a means to create a smooth sealable surface). Pull the SurSeal rubber collar over the manhole frame/chimney. Align the top edge of the collar 1″ above the manhole casting flange and position the bottom preformed gasket so that it is centered a minimum of 1-1/2″ below the top of the concrete cone section. Fold both top and bottom edges of the collar back and remove the release paper from the bottom preformed gasket. Flip/ turn the bottom edge back into position.
TOP: Install the extruded gasket (“C” profile) by pulling it over the manhole frame. Press/seal the gasket 360° onto the edge of the flange making sure no twists are encountered. Unfold the collar to cover the gasket. Center the C-contoured compression band around the edge of the frame’s base flange with the gear nut facing to the right. Tighten securely with a 5/16″ socket drive.
BOTTOM: Center the flat band around the preformed gasket and tighten with a 5/16″ socket drive. Tighten the band sufficiently to achieve ~50% compression of the sealant (Do not over tighten).
Diameter: 34”, 36”, & 38”
Height: 11”, 16”, & 20”