How long before caulk can get rained on?
Some exterior sealants are rain-ready in about an hour; others need a day or more, and a few manufacturers only say not to apply if rain is expected. Check your exact product.
Find your product, then start a countdown with your exact application time:
| Product | Rain-safe | Water-ready |
|---|---|---|
| DAP DYNAFLEX ULTRA Advanced Exterior Sealant White & colors · US | 1 hour | 1 hour |
| GE (Henkel) Supreme Silicone Window & Door Sealant Clear / white · US | 8 hours less under stated conditions | Not provided by manufacturer |
| DAP ALEX ULTRA Advanced Latex Sealant White · US | 1 day | 1 day |
| Sashco Big Stretch Elastomeric Caulk All colors · US | 1–3 days | Not provided by manufacturer |
| DAP DYNAFLEX 230 Premium Elastomeric Sealant White & colors · US | Not provided by manufacturer | 1 day |
| DAP DYNAFLEX 230 Premium Indoor/Outdoor Sealant Clear (Canadian data sheet) · CA | Not provided by manufacturer | 1 day |
Times are the manufacturer’s stated figures under the manufacturer’s conditions. Your product may differ by formula or region. Products are sorted by the first stated time; nothing on this page is sponsored.
Bathroom caulk water-ready times compared →
Paintable caulk paint-ready times compared →
Planning information only. Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.