When estimating the quantity of joint sealer required, it is necessary to review the specification to find out what the engineer requires. Joints may be sealed by "full-bed" coverage or by a bead of caulk, whichever method is permissible. Obtaining the quantity of sealant required has many variables as thickness and width of the joint sealer applied may vary according to applicator's tendencies and workmanship. Use industry knowledge or own experience to apply a variance on material to be purchased. None of these tables have an overage factor applied to them. We suggest 25%.

FLAT BLOCK:
See Table S1: Sealant Estimating - Bead of Caulk - These charts represent the amount of linear feet of caulk/joint sealant per cartridge or per gallon. No butt ends of insulation is represented here.

See Table S2: Sealant Estimating - Full Joint (1/8") - This chart identifies the amount of joint sealer required to place a 'full-bed' coverage of joint sealer on one side and one end of the insulation block.

• Note: The coverage figure of 1/8" equals 13 SF/Gallon coverage rate. If the joint sealer is applied at 1/16" thick will equal 26 SF/Gallon coverage rate.

PIPE COVERING:
See Table S3: Joint Sealer Required - per Lineal ft Pipe Insulation in 2 ft Sections.
See Table S4: Joint Sealer Required - per Lineal ft Pipe Insulation in 3 ft Sections.
This will allow you to obtain the "full-bed" coverage of joint sealer required for either 2' and 3' length insulation sections as required. The coverage includes 1/8" thick on both longitudinal and butt joints per size. Multiply the amount of linear feet per size times the appropriate factor and divide by 13 SF to equal amount of gallons required.

CURVED SIDEWALL SEGMENTS:
Estimating sealant required for curved sidewall segments is additionally complicated because of the varying butt area as a function of pipe covering diameter plus figuring the amount of linear joints, or pieces around. 1) First you will have to obtain the number of pieces around (See Table A3 - Standard Curved Sidewall Segment Sizes.) 2) Then use the following calculations to obtain the amount of joint sealer per longitudinal joint.

     Longitudinal Joint Areas - Single Layer:

Where N = number of sections in the circumference. Then, you must calculate the amount of joint sealer required for each butt joint. This depends on the thickness and length of covering and is independent of the number of sections.

     Butt Joint Area - Single Layer of pipe covering or CSS:

Add both quantities together for total requirements:

Add longitudinal and butt joint area and divide by coverage rate of joint sealant (13 sq. ft./gallon for 1/8" film).

Related Links:

Adhesive Estimating Table A3 - Standard Curved Sidewall Segment Sizes.
Table S1: Sealant Estimating - Bead of Caulk
Table S2: Sealant Estimating - Full Joint
Table S3: Joint Sealer Required - per Lineal Ft Pipe Insulation in 2 ft Sections
Table S4: Joint Sealer Required - per Lineal Ft Pipe Insulation in 3 ft Sections
Sealant Estimating - Three Examples
C.A.S. Index - Several Related Tables

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