ALEX FAST DRY Acrylic Latex Caulk Plus Silicone
Fast drying and specifically formulated to meet the demanding needs of Professional Painters, delivering outstanding paint finish results.
ALEX FAST DRY Acrylic Latex Caulk Plus Silicone is an acrylic latex with silicone sealant from DAP. DAP lists it for window frames, door frames, baseboards. DAP gives the application temperature as 40 to 100 °F, which the product and the surface both have to meet on the day. Cranco carries it, and which counter has it on the day changes, so ask at the counter.
Alex Fast Dry is DAP's acrylic latex caulk with silicone, made for painters. It is tack free in 15 minutes, takes brush or roller paint 20 minutes after it goes on, accepts spray paint immediately, and dries through in 24 hours. DAP's sheet says it exceeds ASTM C834 and carries a 50 year warranty.
It goes on between 40 and 100 °F and holds from -20 to 180 °F once dry. Cranco carries DAP at Concord, Barrie and Mississauga. Call the branch to confirm the colour and size in stock, and the price.
FEATURES AND BENEFITS
- Paint ready in 20 minutes.
- Won't shine through or discolor paint.
- Resists cracking & chalking.
- Exceeds ASTM C834.
- 50 year warranty.
- Cured caulk is mold & mildew resistant.
- Easy water clean-up.
- Low odor.
- Interior/exterior use.
What is DAP Alex Fast Dry used for?
Window frames, door frames, baseboards, molding, trim, corner joints, pipes, vents, siding, and other gaps and cracks, especially the ones going under paint. DAP lists wood painted and unpainted, aluminum, most metals, vinyl, most plastics, glass, drywall, plaster, brick, stone, concrete, mortar, fiber cement and stucco among the substrates it adheres to. Interior and exterior work are both cleared.
How soon can you paint DAP Alex Fast Dry?
DAP gives a paint-ready time of 20 minutes with a brush or roller, or immediately with spray paint. ALEX PLUS takes 30 minutes before painting. ALEX FAST DRY has a 24-hour full dry-through and water-ready time; the earlier paint window does not establish readiness for water exposure.
Is DAP Alex Fast Dry waterproof?
DAP lists a water-ready time of 24 hours. The linked data sheet lists window and door frames, trim, siding and other gaps, but gives no shower or tub application. Confirm a shower-joint product with DAP before using ALEX FAST DRY there. DAP Silicone Plus is a window-and-door silicone; that use alone does not establish suitability for a shower. DAP's 100% silicone
Can you sand DAP Alex Fast Dry?
The linked data sheet says nothing about sanding. What it does give is a 20 minute paint ready time, a 24 hour dry through and a 24 hour return to service. Ask the counter before you plan a sanding step into a paint schedule.
Is DAP Alex Fast Dry flexible?
DAP publishes no movement class for it. The sheet says it meets the extension recovery requirement of ASTM C834 under ASTM C736, and C834 is the acrylic latex specification Alex Fast Dry is tested against. ASTM C920 is the elastomeric specification, and that is the one that carries a movement class. Silicone Plus is rated Class 25 under it.
What joint size does DAP Alex Fast Dry take?
Up to 3/8 inch wide by 3/8 inch deep. Where the depth passes 3/8 inch, DAP calls for backer rod. One 300 mL cartridge runs 55 linear feet at a 3/16 inch bead, and the 162 mL tube runs 30 feet.
How cold can you apply DAP Alex Fast Dry?
Apply between 40 and 100 °F, within DAP’s stated application range. After curing, the service temperature range is -20 to 180 °F. Allow 24 hours before water exposure.
Where can you buy DAP Alex Fast Dry?
At Cranco's counters in Concord, Barrie and Mississauga. DAP makes it in white only, in a 300 mL cartridge and a 162 mL tube. The addresses, phone numbers and hours are further down this page.
Limitations from DAP
DAP: application temperature range is between 40 °F and 100 °F.
DAP: joint size should not exceed 3/8 inch wide by 3/8 inch deep. If joint depth exceeds 3/8 inch, use backer rod material.
Branches
Call the branch to confirm what it has in stock today, and the price.
Data sheet
- DAP Alex Fast Dry data sheet DAP, PDF, 12 May 2025