Rapid Joint®Setting Compound

Continental Rapid Joint is a chemically activated setting-type joint compound with time-controlled hardening properties.


Continental Rapid Joint® Drywall Joint Compound is available in four set times (20 to 35 minutes; 30 to 60 minutes; 60 to 120 minutes; and 180 to 300 minutes) to meet the varied needs of the drywall finishing professional, this adaptable and durable joint compound excels in most prefilling, taping, and first- or finish-coat applications.

Physical Characteristics:

Material: May contain calcium carbonate, perlite, mica, clay, synthetic or natural binders, thickeners, and calcium sulfate (gypsum).

Emissions: Asbestos free.

Coverage: Approximately 350 square feet per bag.

Setting time: Hardening times vary with type: Rapid Joint 20 will set in 20 to 35 minutes; Rapid Joint 45, in 30 to 60 minutes; Rapid Joint 90, in 60 to 120 minutes; and Rapid Joint 210, in 180 to 300 minutes. All are thoroughly dry in approximately 24 hours. Setting times will vary with conditions, such as temperature and humidity, but cannot be lengthened by adding water.

IMPORTANT: Maintain a minimum working temperature (air, material, water) of 45 degrees F (7 degrees C).

Storage: Keep dry, avoid extreme temperatures, and close tightly when not in use; the product has an 18-month shelf life if protected from moisture (including humidity).

Available sizes: Bag: 18 pounds/8.7 kilograms net weight.

Standards and Codes: Rapid Joint is manufactured to conform to ASTM C 475.

  • Time-controlled hardening properties make it easy to meet the requirements of any project schedule;
  • Mixes quickly and lump free (in as little as 30 seconds);
  • Spreads smoothly;
  • Feathers beautifully and sands easily to produce a smooth-as-glass finish;
  • Rapid cleanup (just rinse with warm water) and lighter weight make it easy to use;
  • Approximately 30 percent lighter than conventional setting compound;
  • Low shrinkage and exceptionally strong bonding; and
  • Permits same-day joint finishing.

Rapid Joint® can contribute to the U.S. Green Building Council's Leadership in Energy and Environmental Design (LEED) Credit Qualification in several categories to assist in obtaining LEED certification. Visit www.Continentalnorthamerica.com for more details on specific credit contributions and documentation.

Application Instructions

Apply according to Gypsum Association (GA) publications GA-214 and GA-216.

Mixing Directions:
To mix the entire 18-pound bag: Place 1.25 to 1.50 gallons (4.6 to 6.0 liters) of clean, drinkable water in a plastic bucket, add the compound to the water, and mix thoroughly for 30 to 60 seconds. Scrape the sides of the pail frequently to ensure even mixing, and allow the mixture to stand for two to three minutes. Mixing may be done by hand or with a power-drill mixer as long as the compound is not overly mixed. If necessary, mix the compound another 30 seconds to achieve the desired consistency (water may be added in 4-ounce (100-milliliter) increments


Mix only the amount that can be applied within the "working" time (that is, before the earliest possible setting time).
Do not mix the compound with any other product or material.
Dirty water, overmixing, or extreme heat can accelerate set time.
Overdilution can reduce bond strength and will NOT delay hardening.
The mixing container and tools must be thoroughly cleaned between uses. Set time will be accelerated should new batches of material come in contact with the residue of previous batches.

Prefill imperfections, damaged areas, and large recesses where boards meet. Remove excess material. Allow to harden completely.

Finishing Joints and Corners:
Step one: Apply a thin layer of compound to the tapered joint edge. Press the joint tape firmly into the compound (for inside corners, center-crease the tape) and tightly embed it with a finishing knife. Remove excess material. Apply a thin coat over the tape, nail/screw dimples, and corner beads/trim. For corner beads, extend the first coat at least 5 inches (125 millimeters) onto the panel. Let harden.

Step two: Apply a second coat over fasteners, joints, and trim, feathering the edges approximately 2.5 inches (65 millimeters) beyond the taping coat. For inside corners, allow one side to dry before second-coating the opposite side. Let harden completely.

Light sanding (150-grit sandpaper or 220-grit mesh cloth or finer) may be done when the application is completely dry (after approximately 24 hours). Wet sanding is recommended to avoid dust.

Painting and Wallpapering:
Painting should not proceed until the joint compound is thoroughly dry (see GA-236). For best results, a good-quality gypsum-board primer should be applied, in accordance with the primer manufacturer's instructions, before painting or wallpapering.

Rapid Joint® washes off easily with warm water. Tools should be dried thoroughly to prevent rusting.

Product and Safety Precautions:
WARNING: This product contains silica. Prolonged and repeated exposure may cause lung disease.

KEEP OUT OF REACH OF CHILDREN: Not for internal consumption.

Maintain a minimum working temperature (air, material, water) of 45 degrees F (7 degrees C).
Allow the compound to harden adequately between coats.
Keep the container closed between uses.
Avoid prolonged contact with skin; some ingredients can become irritants.
Wear safety glasses at all times to protect eyes. If eye contact occurs, flush thoroughly with water for 10 to 15 minutes.
Wear a NIOSH-approved respirator when sanding or engaging in other dust-producing activities due to the potential for dust to exceed exposure limits. Exhaust ventilation may be required during dust-producing activities in areas with poor ventilation. 

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