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Spartite Mast Chocks



Spartite™ is the modern answer to the ancient problem of mast support and sealing at the partners. Spartite is a pre-measured two part polymer poured into the cavity between the mast and the partners while the mast is in the boat.

Each kit comes with complete instructions to build a simple mold out of even the most complex partners or mast collar. Spartite makes a one piece perfect fitting mast chock that replaces archaic wedges.

Part No. Description (Click for more information) Price Buy Now
spaRTS Spartite Small Kit $149.75 Add to cart
spaRTL Spartite Large Kit $224.56 Add to cart

To estimate the quantity of SPARTITE needed, measure the square inch, or square centimeter, area of the mast section and subtract that number from the square inch, or square centimeter, area of the partner opening. Multiply this number by the desired depth, which must be at least 2".  If you purchase too little, a further amount can always be mixed and added later.

Small Kit 51 cu. in.
Large Kit 102 cu. in.
Technical Specifications Spartite 2000
Mix Ratio by weight or volume 100/25
Mixed viscosity @ 25°C, cps 2,500
Pot Life @ 25°C 8-14 min
Cure @ 25°C (days before sailing) 3 days
Color Midnight Blue
Shore Hardness 55-60 D
Tensile Strength PSI 4,000
Ultimate elongation % 200
Tear Strength (Graves), PLI 600
Compressive modules PSI 55,000
Linear Shrinkage over 1 inch .001

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P2 Marine, LLC
306 South Lake Drive
Stevensville, MD 21666